JPH11265709A5 - - Google Patents
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- Publication number
- JPH11265709A5 JPH11265709A5 JP1998067280A JP6728098A JPH11265709A5 JP H11265709 A5 JPH11265709 A5 JP H11265709A5 JP 1998067280 A JP1998067280 A JP 1998067280A JP 6728098 A JP6728098 A JP 6728098A JP H11265709 A5 JPH11265709 A5 JP H11265709A5
- Authority
- JP
- Japan
- Prior art keywords
- electron
- positive electrode
- conducting
- paste composition
- binder
- 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
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Description
【発明の名称】正極用ペ―スト組成物の製造方法およびリチウム二次電池の製造方法ならびにリチウム二次電池[Title of Invention] Manufacturing method of paste composition for positive electrode, manufacturing method of lithium secondary battery, and lithium secondary battery
【０００１】
【発明の属する技術分野】
本発明は、正極用ペ―スト組成物の製造方法、およびこの方法で製造したペースト組成物を用いるリチウム二次電池の製造方法、ならびにその製造方法により製造されるリチウム二次電池に関する。[0001]
[Technical Field to which the Invention Belongs]
The present invention relates to a method for producing a paste composition for a positive electrode , a method for producing a lithium secondary battery using the paste composition produced by this method, and a lithium secondary battery produced by this method .
【０００７】
すなわち、本発明は、正極活物質、バインダ、電子伝導助剤および溶剤を含む正極用ペ―スト組成物の製造方法において、バインダと電子伝導助剤とを溶剤と混合して電子伝導性ペ―スト状物を得る第一段の工程と、この電子伝導性ペ―スト状物に正極活物質を混合する第二段の工程とを備えていることを特徴とする正極用ペ―スト組成物の製造方法（請求項１）に係るものである。また、本発明は、上記方法で製造した正極用ペースト組成物を導電性基体上に塗布し、乾燥して、正極活物質、バインダおよび電子伝導助剤を含む塗膜を設けた正極とし、これを用いてリチウム二次電池を製造することを特徴とするリチウム二次電池の製造方法（請求項９）に係るものである。さらに本発明は、上記方法で製造した正極用ペースト組成物を導電性基体上に塗布し、乾燥して、正極活物質、バインダおよび電子伝導助剤を含む塗膜を設けた正極とし、この正極と負極とをセパレータを介して対向させ、これを有機電解液とともに電池ケース内に封入してなることを特徴とするリチウム電池（請求項１０）に係るものである。[0007]
Specifically, the present invention relates to a method for producing a paste composition for a positive electrode, comprising a positive electrode active material, a binder, an electron-conductive additive, and a solvent, the method comprising a first step of mixing the binder and the electron-conductive additive with a solvent to obtain an electron-conductive paste, and a second step of mixing the cathode active material with the electron-conductive paste. The present invention also relates to a method for producing a lithium secondary battery, comprising applying the cathode paste composition produced by the above method to a conductive substrate and drying the resulting cathode to form a coating containing the cathode active material, the binder, and the electron-conductive additive , and using the resulting cathode to produce a lithium secondary battery. The present invention also relates to a lithium battery, comprising applying the cathode paste composition produced by the above method to a conductive substrate and drying the resulting cathode to form a coating containing the cathode active material, the binder, and the electron-conductive additive, and then opposing the cathode and a negative electrode with a separator interposed therebetween, and sealing the resulting cathode and a negative electrode together with an organic electrolyte in a battery case .
【０００９】
本発明において、正極活物質のバインダとしては、ポリフッ化ビニリデン、エチレン−プロピレン−ジエンタ−ポリマ―、ポリテトラフルオロエチレンなどの従来公知のものが広く使用可能である。また、これらのほかに、ポリアニリンやその誘導体、ポリチオフエンやその誘導体、ポリピロ―ルやその誘導体などの電子伝導性ポリマ―（イオンによるド―プ、脱ド―プ反応により電気抵抗が変化する性質を持つポリマ―）を使用することもできる。これらバインダの使用量は、良好な塗膜強度や電池特性を得るため、塗膜中（ペ―スト組成物の固形分中）、通常０．５〜２０重量％であるのが望ましく、０．５〜４重量％とすることができる。 [0009]
In the present invention, a wide variety of conventional binders, such as polyvinylidene fluoride , ethylene-propylene-diene terpolymer, and polytetrafluoroethylene, can be used as the binder for the positive electrode active material. In addition to these, electronically conductive polymers (polymers whose electrical resistance changes upon ion doping and undoping) such as polyaniline and its derivatives, polythiophene and its derivatives, and polypyrrole and its derivatives can also be used. The amount of these binders used in the coating (solid content of the paste composition) is typically desirably 0.5 to 20 wt % and can be 0.5 to 4 wt % in order to obtain good coating strength and battery characteristics.
【００１０】
本発明において、電子伝導助剤としては、カ―ボンブラツク、フアイバ―状カ―ボン、鱗片状黒鉛などが用いられる。その使用量は、良好な電子伝導性および電池特性を得るため、塗膜中（ペ―スト組成物の固形分中）、通常０．２〜５０重量％であるのがよく、０．２〜６重量％とすることができる。また、溶剤としては、バインダを溶解しうる有機溶剤であればよく、たとえば、Ｎ−メチルピロリドン、テトラヒドロフランなどを単独でまたは２種以上混合して用いることができる。[0010]
In the present invention, carbon black, fibrous carbon, flake graphite, etc. are used as the electron conduction aid. The amount of the additive used is usually 0.2 to 50 wt % in the coating film (solid content of the paste composition) to obtain good electron conductivity and battery characteristics, and can be 0.2 to 6 wt %. Furthermore, any organic solvent capable of dissolving the binder can be used as the solvent, and examples thereof include N-methylpyrrolidone and tetrahydrofuran, which can be used alone or in combination.
【００１３】
本発明のリチウム二次電池は、その製造において上記の正極を使用することに特徴を有する。また、本発明のリチウム二次電池は、上記正極と負極とをセパレ―タを介して対向させ、これを有機電解液とともに電池ケ―ス内に封入してなるものである。具体的には、上記の正極と負極とを両者間にセパレ―タを介在させて渦巻状に捲回した渦巻状電極体を、ニツケルめつきを施した鉄やステンレス鋼製の電池ケ―ス内に挿入し、これに電解液を注入し、封口することにより、作製される。このようなリチウム二次電池には，通常、電池内部に発生したガスをある一定圧力まで上昇した段階で電池外部に排出し、電池の高圧下での破裂を防止するための防爆機構が組み込まれる。[0013]
The lithium secondary battery of the present invention is characterized by the use of the above-described positive electrode in its manufacture. The lithium secondary battery of the present invention is also constructed by placing the above-described positive electrode and negative electrode facing each other with a separator interposed therebetween and sealing them together with an organic electrolyte in a battery case. Specifically, the battery is constructed by inserting the above-described positive electrode and negative electrode, which are spirally wound with the separator interposed between them, into a nickel-plated iron or stainless steel battery case, injecting the electrolyte into the battery, and sealing the case. Such lithium secondary batteries typically incorporate an explosion-proof mechanism that vents gas generated inside the battery to the outside when the pressure reaches a certain level, thereby preventing the battery from exploding under high pressure.
【００２０】
（II）塗膜の形成
第一段の工程として、バインダであるポリフツ化ビニリデン４部、カ―ボンブラツク６部およびＮ−メチルピロリドン２３部を、ニ―ダにより１時間混合して、電子伝導性ペ―スト状物を得た。つぎに、第二段の工程として、上記の電子伝導性ペ―スト状物に、正極活物質であるリチウムニツケル酸化物９０部および追加の溶剤としてＮ−メチルピロリドン１７部を加え、これらをプラネタリミキサにより２時間混合して、正極用ペ―スト組成物を調製した。ペースト組成物の固形分中、バインダの含有量は４重量％であり、電子伝導助剤の含有量は６重量％であった。 [0020]
(II) Coating Formation: In the first step, 4 parts of polyvinylidene fluoride (a binder), 6 parts of carbon black, and 23 parts of N-methylpyrrolidone were mixed in a kneader for 1 hour to obtain an electronically conductive paste. In the second step, 90 parts of lithium nickel oxide (a positive electrode active material) and 17 parts of N-methylpyrrolidone (an additional solvent) were added to the electronically conductive paste, and the mixture was mixed in a planetary mixer for 2 hours to prepare a paste composition for a positive electrode. The binder content of the paste composition was 4 wt %, and the electronically conductive additive content was 6 wt % of the solid content.
Claims (17)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10067280A JPH11265709A (en) | 1998-03-17 | 1998-03-17 | Method for producing paste composition for positive electrode, method for producing positive electrode, and lithium secondary battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10067280A JPH11265709A (en) | 1998-03-17 | 1998-03-17 | Method for producing paste composition for positive electrode, method for producing positive electrode, and lithium secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11265709A JPH11265709A (en) | 1999-09-28 |
| JPH11265709A5 true JPH11265709A5 (en) | 2004-12-24 |
Family
ID=13340413
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10067280A Pending JPH11265709A (en) | 1998-03-17 | 1998-03-17 | Method for producing paste composition for positive electrode, method for producing positive electrode, and lithium secondary battery |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH11265709A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4883894B2 (en) * | 2004-09-30 | 2012-02-22 | 三洋電機株式会社 | Negative electrode for lithium secondary battery and method for producing the same |
| JP2008311217A (en) * | 2007-05-16 | 2008-12-25 | Hitachi Chem Co Ltd | Binder resin composition for nonaqueous electrolyte energy device electrode, nonaqueous electrolyte energy device electrode using the composition, and nonaqueous electrolyte energy device |
| JP6720488B2 (en) * | 2015-09-08 | 2020-07-08 | 株式会社豊田自動織機 | Method for producing a composition containing a plurality of positive electrode active materials, a conductive auxiliary agent, a binder and a solvent |
-
1998
- 1998-03-17 JP JP10067280A patent/JPH11265709A/en active Pending
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