WO2025040586A1 - Matériau actif de cathode revêtu pour batteries au lithium-ion - Google Patents

Matériau actif de cathode revêtu pour batteries au lithium-ion Download PDF

Info

Publication number
WO2025040586A1
WO2025040586A1 PCT/EP2024/073101 EP2024073101W WO2025040586A1 WO 2025040586 A1 WO2025040586 A1 WO 2025040586A1 EP 2024073101 W EP2024073101 W EP 2024073101W WO 2025040586 A1 WO2025040586 A1 WO 2025040586A1
Authority
WO
WIPO (PCT)
Prior art keywords
cam
coating
lfmp
conductive carbon
composite particle
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/EP2024/073101
Other languages
English (en)
Inventor
Prasad MANGESH KORDE
Parth Omprakash DAYAMA
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Northvolt AB
Original Assignee
Northvolt AB
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Northvolt AB filed Critical Northvolt AB
Publication of WO2025040586A1 publication Critical patent/WO2025040586A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/131—Electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
    • H01M4/139—Processes of manufacture
    • H01M4/1397—Processes of manufacture of electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/362—Composites
    • H01M4/366—Composites as layered products
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
    • H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
    • H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
    • H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/36—Selection of substances as active materials, active masses, active liquids
    • H01M4/58—Selection of substances as active materials, active masses, active liquids of inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy; of polyanionic structures, e.g. phosphates, silicates or borates
    • H01M4/5825—Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M4/00—Electrodes
    • H01M4/02—Electrodes composed of, or comprising, active material
    • H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
    • H01M4/624—Electric conductive fillers
    • H01M4/625—Carbon or graphite
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present description relates to coated cathode materials for lithium-ion batteries.
  • Rechargeable or 'secondary' batteries find widespread use as electrical power supplies and energy storage systems.
  • battery packs formed of a plurality of battery modules, wherein each battery module includes a plurality of electrochemical cells are provided as a means of effective storage and utilization of electric power.
  • Secondary cells such a lithium-ion cells comprise a positive and a negative electrode, the cathode and the anode, respectively.
  • Each electrode typically includes three components: active material, conductive additives, and polymeric binders.
  • the active material is the major component of the electrode.
  • exemplary cathode active materials include the layered lithium metal oxide (LiMO?) cathode materials.
  • active cathode materials such as lithium nickel manganese cobalt oxide (NMC) and lithium nickel cobalt aluminium oxide (NCA) are two possible active cathode materials for high-energy Li-ion batteries.
  • NMC lithium nickel manganese cobalt oxide
  • NCA lithium nickel cobalt aluminium oxide
  • the CAM are further functionalized to improve different properties.
  • coatings are often applied to protect the surface of the CAM. However, these coatings often form an inactive phase on the surface of the active cathode materials which may impede the charging and discharging.
  • the remaining components of the cell are not able to reversibly bind Li-ions and hence they do not improve the capacity of the cell.
  • the conductive additive increases the conductivity inside the electrodes for rapid charging and discharging, while the polymer binder adhesively connects all the electrode materials for long-term charge/discharge cycling.
  • these components add mass to the cell without increasing the capacity of the cell, the overall energy density will drop as the amount of these components increases.
  • This disclosure relates to a novel composite particle for the positive electrode of an energy storage device comprising a core of CAM and a coating of lithium iron manganese phosphate (LFMP) and conductive carbon, and a method of forming the compositive particle.
  • LFMP lithium iron manganese phosphate
  • the use of the novel composite particle allows for reduced use of conductive additives which results in increased energy density.
  • the object of the present disclosure is to provide a coated CAM and a method for fabricating said coated CAM.
  • the resultant coated cathode active material has increased conductivity and better thermal stability. Specifically, the increased conductivity of the CAM allows for the production of a battery with increased energy density, since the addition of conductive additives in the electrode can be decreased.
  • a composite particle for the positive electrode of an energy storage device comprising: a core comprising a cathode active material (CAM); a coating comprising lithium iron manganese phosphate (LFMP) and conductive carbon.
  • CAM cathode active material
  • LFMP lithium iron manganese phosphate
  • a process for coating the surface of a CAM comprising combining the CAM, LFMP, and conductive carbon to provide a composite particle having a core of CAM surrounded by LFMP and conductive carbon.
  • a coated CAM obtained by the process for coating a CAM with LFMP and conductive carbon.
  • FIG. 1 Figure la/lb/lc schematically show the various forms of the coated composite particle of the invention.
  • the sizes and relative thicknesses of layers and regions may be exaggerated, and the same reference numerals denote the same elements throughout the present invention.
  • the disclosure relates to a coated cathode active material and a method of producing said coated cathode active material.
  • the obtained coated cathode active material is a composite particle comprising a core comprising a cathode active material (CAM), and a coating comprising lithium iron manganese phosphate (LFMP) and conductive carbon.
  • Figures la, lb, and lc show various embodiments of a coated composite particle.
  • the disclosure relates to a coated cathode active material and a method of producing said coated cathode active material.
  • cathode active material refers to any material that is suitable for use as the electrochemically active material in a cathode, and suitable for use in a cell.
  • the role of the CAM is to reversibly intercalate ions (such as lithium ions) during cell charge and discharge cycles.
  • the cathode active material of the disclosure is an intercalation material, wherein the intercalation metal is lithium.
  • the cathode active material is a transition metal complex such as layered lithium metal oxide (UMO2) cathode materials.
  • UAO2 layered lithium metal oxide
  • the cathode active material is a lithium nickel manganese cobalt oxide (NMC) and/or a lithium nickel cobalt aluminium oxide (NCA).
  • the cathode active material comprises lithium nickel cobalt manganese oxides (NMC) (LiNii x-yCoxMnyO? (0 ⁇ x+y ⁇ l)).
  • NMC lithium nickel cobalt manganese oxides
  • the cathode active material comprises lithium nickel cobalt aluminium oxides (NCA) (LiNii-x-yCoxAlyCh (0 ⁇ x+y ⁇ l)).
  • NCA lithium nickel cobalt aluminium oxides
  • the layered lithium metal oxide (L1MO2) cathode materials are high in nickel.
  • the high-nickel active cathode material may include one or more of the NCA or the NCM.
  • a ratio of the components of the high-nickel active cathode material may range from 1: 1: 1 to 8: 1 : 1.
  • a ratio of the NCA (e.g. nickel: cobalt: aluminium) or the NCM (e.g. nickel:manganese:cobalt) may be 8: 1: 1.
  • the ratio may be 6:2:2.
  • the ratio additionally or alternatively, the ratio may be 5:3:2.
  • the NCM or the NCA may comprise a ratio of about 1: 1: 1.
  • the cathode active material comprises lithium nickel cobalt manganese oxides (NMC) (LibNii-x-yCoxMn y AzO2 (0 ⁇ x+y ⁇ l)), where A is an element other than Li, Ni, Co, Mn or O and wherein 0>z>0.05, preferably 0>z>0.03, and wherein 0.9>b> l.l.
  • NMC lithium nickel cobalt manganese oxides
  • the NMC cathode materials are high in nickel.
  • the cathode active material typically comprises lithium nickel cobalt manganese oxides (NMC) represented by the formula LibNii x-yCoxMn y AzO2, wherein 0 ⁇ x+y ⁇ 0.4, preferably 0 ⁇ x+y ⁇ 0.25, and wherein 0>z>0.05, preferably 0>z>0.03, and wherein 0.9>b> l. l.
  • NMC lithium nickel cobalt manganese oxides
  • the ratio of the nickel of the high-nickel NMC material may range from 33 mol% to 98 mol %. Preferably, the ratio may range from 60 mol% to 95 mol%. Even more preferably, the ratio may range from 80 mol% to 95 mol%.
  • the NMC cathode materials is defined as LibNii x-yCoxMn y AzO2, wherein 0 ⁇ x+y ⁇ 0.4, preferably 0 ⁇ x+y ⁇ 0.25, and wherein 0>z>0.05, preferably 0.002>z>0.03, and wherein 0.9>b> l.l.
  • A is one or more chosen from the group Al, B, Zr, Ba, Ca, Ti, Mg, Ta, Nb, V, Fe, Ru, Re, Pt and Mo. In some embodiments, preferably z is 0.
  • the CAM may be present in an amount of from about 75 wt% to about 99 wt%, for example from 80 wt% to about 98 wt%, such as from about 86 wt% to about 98 wt%, preferably from about 91 wt% to 98 wt%, based on the total weight of the composite particle.
  • An exemplary coating material includes lithium iron manganese phosphate (LFMP), which may be represented by the formula LiFei-xMnxPCk (0 ⁇ x ⁇ l).
  • LFMP lithium iron manganese phosphate
  • LFMP is used as coating material to provide the a number of benefits. Firstly, its redox potential is compatible with NCM and NCA, resulting in efficient charge/discharge processes. This means that the cycle life performance is improved. Secondly, it provides a protective layer (i.e. a layer that reduces unwanted interactions between the CAM and electrolyte), which results in increased thermal stability.
  • the LFMP may be present in an amount of from about 0.8 wt% to about 24 wt%, for example from 1 wt% to about 19 wt%, such as from about 1.5 wt% to about 13 wt%, preferably from about 1.8 wt% to 8.5 wt%, based on the total weight of the composite particle.
  • the LFMP material may comprise nanoscale LFMP-particles.
  • the disclosure relates to composite particles of cathode active material comprising a surface coating of LFMP and conductive carbon and a method of producing said coated cathode active material.
  • conductive carbon refers to any material that has electronically conductive properties, while having carbon as a major constituent.
  • the carbon content of the conductive carbon is at least about 90 wt%, such as above 92 wt%, or above 94 wt%.
  • the carbon content is above 95 wt%. More preferably, the carbon content is above 98 wt%.
  • the conductive carbon is selected from the group of graphene, carbon black, acetylene black, carbon nanotubes, or a combination thereof. More preferably, the conductive carbons are selected from the group of carbon black, graphene, or a combination thereof.
  • the role of the conductive carbon is to improve the electronic properties of the cathode active material.
  • the conductive carbon would be added in the slurry used for preparing the cathode.
  • often more than 1 wt% of conductive additive is required to ensure sufficient levels of conductivity in the resultant electrode.
  • the conductive carbon may be present in the coating in an amount of from about 0.01 wt% to about 1 wt%, for example from about 0.02 wt% to about 0.9 wt%, such as from about 0.04 wt% to about 0.8 wt%, for example from about 0.03 to about 0.7, such as from about 0.05 to 0.5 wt%, for example from 0.1 to 0.4, based on the total weight of the composite particle.
  • the cathode active material of the disclosure is coated with LFMP and conductive carbon to provide a composite particle comprising a core of CAM and a coating of LFMP and conductive carbon.
  • coating or “coated” refers to a cathode active material wherein the cathode active material particle surface comprises LFMP and conductive carbon.
  • composite particle refers to a particle comprising a core and a surface.
  • the core comprises CAM
  • the surface comprises LFMP and conductive carbon.
  • composite particle and “coated particle” are used interchangeably.
  • Benefits of providing a cathode active material coated with LFMP and conductive carbon include improved electronic properties such as ion conduction, improved thermal stability and thus improved battery performance.
  • the LFMP and conductive carbon coating also protects the cathode active material from side-reactions with the electrolyte and therefore provides improved capacity retention thus prolonging cell lifetime.
  • the particles of cathode active material of the disclosure comprise a thin coating.
  • thin refers to a surface coating comprising LFMP and conductive carbon which may be 2 microns or less, for instance 1 micron or less, preferably 0.8 microns or less. Additionally, the thickness of the coating may be 0.01 microns or more, such as 0.05 microns or more.
  • the resulting composite particle consists of or comprises 75-99 wt% CAM, 0.8-24 wt% LFMP, and 0.01-1 wt% conductive carbon based on the total weight of the composite particle.
  • 86-98 wt% CAM, 1.5-13 wt% LFMP, and 0.02-0.9 wt% conductive carbon such as 91-98 wt% CAM, 1.8-8.5 wt% LFMP, and 0.04-0.8 wt% conductive carbon, for example 91-98 wt% CAM, 1.8-8.5 wt% LFMP, and 0.05-0.5 wt% conductive carbon based on the total weight of the composite particle.
  • One embodiment of the disclosure is a composite particle as depicted on Figure la (100), wherein the core comprises CAM (101). The core is surrounded by a thin coating of conductive carbon (102), while the outermost coating is based on LFMP (103).
  • Another embodiment of the disclosure is a composite particle as depicted on Figure lc (110), wherein the core comprises CAM (101). The core is surrounded by a coating of LFMP (103), while the outermost coating is based on conductive carbon (102).
  • a further embodiment of the disclosure is a composite particle as depicted on Figure lb (105), wherein the core comprises CAM (101).
  • the core is surrounded by a layer comprising a mixture of conductive carbon and LFMP, such as a layer formed by conductive carbon coated LFMP particles (104).
  • the coated particle depicted in Figure lb may be formed by co-depositing or sequentially depositing the LFMP and conductive carbon on a CAM particle.
  • LFMP may be coated on the CAM in a first step to provide a non-uniform coating.
  • These non-uniformities may comprise small cavities/pores which the subsequently added conductive carbon (102) may occupy during the second coating step. This results in a particle in which the conductive carbon (102) is then envisaged to permeate into the LFMP coating (103). In this way, the conductive carbon coating (102) may enter the cavities of the LFMP coating (103) and/or cover the surface outside the cavities.
  • the coating may be continuous such that the surface upon coating is smooth and not porous.
  • Each coating may cover at least a portion of the surface.
  • the coating may cover a majority, up to 100%, of the surface. For example, up to 95% or up to 90%.
  • the range of coverage may be proportional to the concentration of the coating.
  • the weight percentage of LFMP (103) is higher than that of the conductive carbon (102). Therefore, it is envisaged that the LFMP (103) coating will cover a bigger proportion of the surface, or in the case of dual-layer coatings (as depicted in Figures la and lc) may represent the thicker of the two coating layers.
  • the coated CAM of the disclosure may be formed by combining the CAM, LFMP, and conductive carbon to provide a composite particle having a core of CAM surrounded by a coating (or shell) of LFMP and conductive carbon.
  • the disclosure relates to a method of forming the composite particle comprising the steps of: combining CAM particles, LFMP and conductive carbon to form a composite particle having a core of CAM and a coating of LFMP and conductive carbon.
  • the method may comprise two steps: forming a first layer on said CAM particle to provide a coated CAM particle; forming a second layer on said coated CAM particle to form said composite particle
  • the first layer may be LFMP
  • the second layer may be conductive carbon
  • the first layer may be conductive carbon
  • the second layer may be LFMP
  • the LFMP and conductive carbon may be co-deposited, for instance in a method comprising the steps of: providing a CAM particle; co-depositing LFMP and conductive carbon to form said composite particle.
  • the co-depositing may be simultaneous as separate entities.
  • the co-depositing is in the form of a composite material comprising LFMP and conductive carbon which is deposited on the CAM.
  • the composite material may be formed by a process comprising the steps of: providing LFMP particles; coating said LFMP particles with conductive carbon.
  • the coating processes may occur at temperatures between from about 20°C to about 100°C.
  • Any of the above coating processes may occur via a wet or dry process.
  • the coating processes optionally occurs in the presence of a solvent resulting in a wet process.
  • the optionally present solvent comprises low-boiling solvents such as ethanol, heptane, iso-propanol, and combinations thereof. When present, the solvent may be added at any time during mixing.
  • An exemplary wet process of the disclosure comprises the following steps: dispersing the particles to be coated and the coating material in a low-boiling solvent; mixing the formed dispersion, typically for at least 1 minute (preferably at least one hour), at ambient temperature; heating the resulting dispersion to a temperature from about 50 °C to about 120 °C to remove solvent and yield the coated particles.
  • the mixing is conducted at temperatures up to about 100°C.
  • the choice of temperature may depend on the optionally present solvent.
  • vacuum is applied during solvent removal.
  • Said wet process comprises various procedures for mixing such as stirring, blending, and ultra-sonification.
  • Suitable low-boiling solvents for said wet process include ethanol, heptane, iso-propanol, and combinations thereof.
  • the conductive carbon is provided as a dispersion to aid in its processing. Therefore, preferably the coating step which involves adding a layer of conductive carbon proceeds as a wet process.
  • An exemplary dry process of the disclosure comprises the following steps: providing the particles to be coated and the coating material; mixing said particles with said material at ambient temperature for at least one minute (typically for at least one hour) to yield the coated particles.
  • the mixing is conducted at temperatures up about 100°C.
  • Said dry process comprises various procedures for mixing such as stirring and mechanical blending.
  • dry methods such as atomic layer deposition (ALD) may be used.
  • the formation of the composite particle of the disclosure comprises two steps.
  • Said two steps involve: a. coating a layer of conductive carbon on particles having a core of LFMP or CAM and; b. coating a layer of particles having a core of LFMP on particles having a core of CAM; wherein the two steps can be performed in any order.
  • Each of the steps a. and b. can proceed as either dry or wet processes.
  • the optional heating to remove solvent may be redundant in between the two steps.
  • One embodiment of the invention discloses a method, wherein the first step comprises coating of conductive carbon (102) on CAM (101), and wherein the second step comprises coating of LFMP (103) on the coated CAM to produce a coated particle (100) as seen in figure la.
  • the first step is conducted using a wet coating procedure.
  • the second step functions well for both wet and dry coating procedures. If a wet coating procedure is used for the second step, preferably a different solvent or solvent mixture is used for the second step.
  • An additional embodiment of the invention discloses a method, wherein the first step comprises coating of conductive carbon (102) on LFMP (103), and wherein the second step comprises coating of the coated LFMP (104) on the CAM (101) to produce a coated particle (105) as seen in figure lb.
  • This method allows for co-deposition of LFMP and conductive carbon on the CAM.
  • the second step functions well for both wet and dry coating procedures. If a wet coating procedure is used for the second step, preferably a different solvent or solvent mixture is used for the second step.
  • Another embodiment of the invention discloses a method, wherein the first step comprises coating of LFMP (103) on the CAM (101), and wherein the second step comprises coating of conductive carbon (102) on the coated CAM to produce a coated particle (110) as seen in figure lc.
  • the second step is conducted using a wet coating procedure.
  • the second step uses a different solvent system than that of the first step to minimise the risk of redissolving the LFMP coating of the first step.
  • the composite particles according to the disclosure allows for reduced use of conductive additives which results in increased energy density when used as CAM in a lithium-ion battery.
  • a slurry with all the necessary components is formed.
  • the slurry comprises the composite particles of the disclosure, a binder, and a solvent.
  • the binder adhesively connects all the electrode materials for longterm charge/discharge cycling.
  • the addition of solvent allows for easy preparation of the electrode.
  • no conductive additives are added to prepare the slurry.
  • conductive additives in this context is meant conductive carbon as defined above which is added as a component separate to the coated cathode active material of the disclosure.
  • the slurry composition is formulated to a suitable viscosity to allow it to be processed into a cathode, for example by slot-die coating.
  • the binder is present in a small amount such as below 8 wt%, for example below 5 wt%, such as below 3 wt%, for example below 1 wt% based on the weight of the solids.
  • the remainder of the solids are constituted of the composite particles of the disclosure.
  • the disclosure also relates to a positive electrode such as those formed from the slurry composition of the disclosure.
  • the positive electrode of the disclosure comprises (or consists of) the coated CAM of the disclosure; a binder; and optionally a conductive additive.
  • the positive electrode of the disclosure may comprise up to 0.8 wt% conductive additive, such as from 0 to 0.5 wt% conductive additive, or from 0 to 0.3 wt% conductive additive, such as from 0 to 0.2 wt% conductive additive, or from 0 to 0.1 wt% conductive additive, based on the weight of the positive electrode.
  • the positive electrode of the disclosure may be free of conductive additives, beyond the conductive carbon in the coated CAM.
  • the term “comprises” will take its usual meaning in the art, namely indicating that the component includes but is not limited to the relevant features (i.e. including, among other things). As such, the term “comprises” will include references to the component consisting essentially of the relevant substance(s).

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Composite Materials (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Battery Electrode And Active Subsutance (AREA)

Abstract

L'invention concerne un matériau actif de cathode à intercalation de lithium revêtu pour une batterie lithium-ion et un procédé de formation dudit matériau actif de cathode revêtu. En particulier, le matériau actif de cathode revêtu comprend un revêtement de phosphate de lithium-fer-manganèse (LFMP) et de carbone conducteur. Dans certains exemples, le matériau de cathode comprend de l'oxyde de lithium-nickel-manganèse-cobalt (NMC) ou de l'oxyde de lithium-nickel-cobalt-aluminium (NCA). Le matériau actif de cathode revêtu de l'invention est approprié pour être utilisé dans des électrodes conduisant à des électrodes ayant une densité d'énergie élevée.
PCT/EP2024/073101 2023-08-18 2024-08-16 Matériau actif de cathode revêtu pour batteries au lithium-ion Pending WO2025040586A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE2350984 2023-08-18
SE2350984-7 2023-08-18

Publications (1)

Publication Number Publication Date
WO2025040586A1 true WO2025040586A1 (fr) 2025-02-27

Family

ID=92542917

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2024/073101 Pending WO2025040586A1 (fr) 2023-08-18 2024-08-16 Matériau actif de cathode revêtu pour batteries au lithium-ion

Country Status (1)

Country Link
WO (1) WO2025040586A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107895781A (zh) * 2017-10-27 2018-04-10 深圳市沃特玛电池有限公司 一种锂离子电池的复合正极材料及其制备方法
CN110459749A (zh) * 2019-08-21 2019-11-15 中国科学院宁波材料技术与工程研究所 一种复合正极材料及其制备方法
CN114512655A (zh) * 2022-03-08 2022-05-17 湖南电将军新能源有限公司 一种锂离子电池正极复合材料及其制备方法和应用
CN114512649A (zh) * 2022-02-08 2022-05-17 江苏中兴派能电池有限公司 一种复合磷酸锰铁锂正极材料、制备方法及其应用
CN115036466A (zh) * 2022-06-02 2022-09-09 深圳市德方纳米科技股份有限公司 多元磷酸盐正极材料及其制备方法、二次电池

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107895781A (zh) * 2017-10-27 2018-04-10 深圳市沃特玛电池有限公司 一种锂离子电池的复合正极材料及其制备方法
CN110459749A (zh) * 2019-08-21 2019-11-15 中国科学院宁波材料技术与工程研究所 一种复合正极材料及其制备方法
CN114512649A (zh) * 2022-02-08 2022-05-17 江苏中兴派能电池有限公司 一种复合磷酸锰铁锂正极材料、制备方法及其应用
CN114512655A (zh) * 2022-03-08 2022-05-17 湖南电将军新能源有限公司 一种锂离子电池正极复合材料及其制备方法和应用
CN115036466A (zh) * 2022-06-02 2022-09-09 深圳市德方纳米科技股份有限公司 多元磷酸盐正极材料及其制备方法、二次电池

Similar Documents

Publication Publication Date Title
US9911976B2 (en) Negative electrode active material for secondary battery, conductive composition for secondary battery, negative electrode material comprising same, negative electrode structure and secondary battery comprising same, and method for manufacturing same
EP2847813B1 (fr) Batterie rechargeable au lithium-ion et son procédé de production
KR101396521B1 (ko) 리튬 이차 전지용 음극 활물질, 이의 제조 방법, 그리고 이를 포함하는 음극 및 리튬 이차 전지
US12107261B2 (en) Negative electrode active material for lithium secondary battery and method for preparing the same
CN109904404B (zh) 锂二次电池负极活性材料、其制备方法及含其锂二次电池
WO2013049939A1 (fr) Matériaux pour électrodes positives, procédé pour leur préparation et leur utilisation dans des batteries secondaires au lithium
CN104247105A (zh) 包含多孔硅氧化物-碳材料复合物的负极活性材料及其制备方法
EP4394923A1 (fr) Matériau actif d'électrode négative et son procédé de préparation, batterie secondaire comprenant un matériau actif d'électrode négative, et dispositif électrique
EP4564509A1 (fr) Électrolyte à l'état solide, son procédé de préparation, batterie secondaire, module de batterie, bloc-batterie et appareil électrique
Gholami et al. Physical vapor deposition of TiO2 nanoparticles on artificial graphite: an excellent anode for high rate and long cycle life lithium-ion batteries
CN117223120A (zh) 一种负极片及其应用
CN116097463A (zh) 负极和包含所述负极的二次电池
Fu et al. High reversible silicon/graphene nanocomposite anode for lithium-ion batteries
EP4040526B1 (fr) Électrode positive pour pile au lithium-soufre et son procédé de fabrication
Mae et al. A stable full cell having high energy density realized by using a three-dimensional current collector of carbon nanotubes and partial prelithiation of silicon monoxide
US20200403224A1 (en) Lithium molybdate anode material
CN113782821A (zh) 具有高能量密度和稳定运行能力的全固态电池
Shan et al. Promoting Si-graphite composite anodes with SWCNT additives for half and NCM811 full lithium ion batteries and assessment criteria from an industrial perspective
JP7827266B2 (ja) 二次電池用負極、二次電池、および二次電池用負極の製造方法
WO2025040586A1 (fr) Matériau actif de cathode revêtu pour batteries au lithium-ion
JP2024512901A (ja) 単一壁炭素ナノチューブが適用された負極およびそれを含む二次電池
CN115719812A (zh) 复合集流体、正极片及制备方法、电池及用电设备
US20200220166A1 (en) Nanoporous Carbon as Host Material for Sodium
US10784511B1 (en) Nanoporous carbon as an anode material for Li-ion batteries
US20220352504A1 (en) Layered electrode with high rate top layer

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 24761571

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE