JPS6164075A - atomized zinc particles - Google Patents
atomized zinc particlesInfo
- Publication number
- JPS6164075A JPS6164075A JP59185415A JP18541584A JPS6164075A JP S6164075 A JPS6164075 A JP S6164075A JP 59185415 A JP59185415 A JP 59185415A JP 18541584 A JP18541584 A JP 18541584A JP S6164075 A JPS6164075 A JP S6164075A
- Authority
- JP
- Japan
- Prior art keywords
- zinc
- particles
- zinc particles
- prepared
- flat
- 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
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
- H01M4/06—Electrodes for primary cells
- H01M4/08—Processes of manufacture
- H01M4/12—Processes of manufacture of consumable metal or alloy electrodes
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
Description
【発明の詳細な説明】
［発明の技術分野］
本発明はアルカリ電池の負極に用いて有用な噴霧亜鉛粒
に関し、更に詳しくは、電池の放電特性を改善する形状
の噴霧亜鉛粒に関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to atomized zinc particles useful in negative electrodes of alkaline batteries, and more particularly to atomized zinc particles having a shape that improves the discharge characteristics of the battery.
［発明の技術的背景とその問題点］
従来、アルカリ電池の負極合剤には溶融塵、鉛を大気中
で噴霧して製造しな噴霧亜鉛粒が用いられている。すな
わち、粒径が約０．３１１ＩＩ１１程度の球又はアーモ
ンド形状の噴霧亜鉛粒を、苛性カリのような電解質やポ
リアクリル酸塩のような増粘剤と混練して該噴霧亜鉛粒
を分散せしめたゲル状亜鉛負極合剤である。[Technical background of the invention and its problems] Conventionally, atomized zinc particles, which are not produced by spraying molten dust and lead in the atmosphere, have been used as a negative electrode mixture for alkaline batteries. That is, a gel in which spherical or almond-shaped sprayed zinc particles with a particle size of about 0.311II11 are kneaded with an electrolyte such as caustic potash or a thickener such as polyacrylate to disperse the sprayed zinc particles. This is a zinc negative electrode mixture.
このゲル状合剤において、亜鉛の放電反応時の電子の流
れは噴霧亜鉛粒それぞれの相互接触点のネットワークに
依存する。上記した形状の噴霧亜鉛粒の場合、合剤中に
おける相互の接触は点接触となる。したがって、電池の
負極放電時、とりわけ高負荷放電時にあっては、これら
噴霧亜鉛Ｆｉ間の接触抵抗が大きくなり電池の作動電圧
が全体として低下する、総じて放電特性の低下を招く。In this gel mixture, the flow of electrons during the discharge reaction of zinc depends on the network of mutual contact points of each atomized zinc particle. In the case of the atomized zinc particles having the above-mentioned shape, mutual contact in the mixture is point contact. Therefore, during negative electrode discharge of the battery, particularly during high load discharge, the contact resistance between these atomized zinc Fi increases and the operating voltage of the battery as a whole decreases, leading to a decrease in the discharge characteristics as a whole.
［発明の目的］
本発明は、上記した問題を解消して電池の放電特性を向
上させることができる噴霧亜鉛粒の提供を目的とする。[Object of the Invention] An object of the present invention is to provide atomized zinc particles that can solve the above-mentioned problems and improve the discharge characteristics of a battery.
［発明の概要］
本発明者らは上記目的を達成すべく鋭意研究を重ねる過
程で、従来用いられている噴霧亜鉛粒は、その形状がマ
クロには球状又はアーモンド状であるため相互の接触は
点接触にならざるを得ないという事実に着目した。した
がって、相互の接触機会を高めるために面接触が可能な
形状に改変することを着想し本発明形状の噴霧亜鉛粒を
開発するに至った。[Summary of the Invention] In the course of intensive research to achieve the above object, the present inventors discovered that the sprayed zinc particles conventionally used have a macroscopically spherical or almond-like shape, so that they do not come into contact with each other. We focused on the fact that point contact is inevitable. Therefore, in order to increase the chances of mutual contact, the inventors came up with the idea of modifying the shape to allow surface contact, and developed the atomized zinc particles having the shape of the present invention.
すなわち、本発明の噴霧亜鉛粒は、表面の少なくとも一
部が偏平形状をしていることを特徴とする。That is, the atomized zinc particles of the present invention are characterized in that at least a portion of the surface has a flat shape.
本発明の亜鉛粒は、表面の一部が一直線に切除されて偏
平な面が露出した形状のものである０例えば、その形状
を模式図として第１図、第２図に示した。第１図は、溶
融噴霧法で製造されたアーモンド形状の亜鉛粒ｌの一部
１ａが偏平になっているものであり、第２図は、球状の
亜鉛粒２の上方２２１．下方２ｂがそれぞれ偏平形状を
なしているものである。The zinc grains of the present invention have a shape in which a part of the surface is cut off in a straight line to expose a flat surface.For example, the shape is shown schematically in FIGS. 1 and 2. FIG. 1 shows almond-shaped zinc grains 1 manufactured by the melt spraying method, in which a portion 1a is flattened, and FIG. 2 shows an upper portion 221. of spherical zinc grains 2. The lower portions 2b each have a flat shape.
本発明の亜鉛粒は以上のような形状をしているので、負
極合剤に分散せしめたとき、これら偏平部分が相互に面
接触して粒間の接触面積が全体として広くなり、したが
って粒間の電子導電性が高まって電池の放電特性の向上
に資するものと考えられる。Since the zinc particles of the present invention have the above-mentioned shape, when they are dispersed in a negative electrode mixture, these flat portions come into surface contact with each other, increasing the contact area between the particles as a whole. It is thought that this increases the electronic conductivity of the battery and contributes to improving the discharge characteristics of the battery.
亜鉛粒の表面にどの程度の量の偏平部分を形成するかと
いう問題は、目的とする電池の特性などによって規定さ
れるので一義的には決められない。通常は、粒の全表面
積に対し２０〜８０％程度でよい。The question of how much flattened portions should be formed on the surface of the zinc grains cannot be determined uniquely because it is determined by the characteristics of the intended battery. Usually, it may be about 20 to 80% of the total surface area of the grains.
このような亜鉛粒は、次のようにして製造することがで
きる。すなわち、常用の溶融噴霧法によって所定粒径の
噴霧亜鉛粒を調製する。このときの全体形状は通常、球
又はアーモンド状である。ついで、得られた噴霧亜鉛粒
を、ローラ間が一定間隔に保持されたローラプレス機に
通す、亜鉛粒はローラによって圧延されてローラとの接
触面が、第１図、第２図に例示したような偏平形状に変
化する。また、ローラプレスで亜鉛の平板をつくり、こ
れを破砕して小片にしてもよい。Such zinc particles can be manufactured as follows. That is, atomized zinc particles having a predetermined particle size are prepared by a commonly used melt spraying method. The overall shape at this time is usually spherical or almond-shaped. Next, the obtained atomized zinc particles are passed through a roller press machine in which the rollers are maintained at a constant interval.The zinc particles are rolled by the rollers so that the contact surface with the rollers is as shown in FIGS. 1 and 2. It changes into a flat shape like this. Alternatively, a flat plate of zinc may be made using a roller press and then crushed into small pieces.
なお、溶融噴霧時に、溶融滴を、例えば平滑な板面に噴
きつければ、板面と接触した部分を偏平形状にすること
もできる。In addition, if the molten droplets are sprayed onto a smooth plate surface at the time of melt spraying, the portion in contact with the plate surface can be made into a flat shape.
［発明の実施例］
（１）噴霧亜鉛粒の調製
高純度黒鉛製るつぼの中に亜鉛を入れて溶融した。得ら
れた融液を大気中で噴霧し、平均粒径０．３ ｒａ嘗の
球状亜鉛粒を得た。[Examples of the Invention] (1) Preparation of sprayed zinc particles Zinc was placed in a crucible made of high purity graphite and melted. The obtained melt was sprayed in the air to obtain spherical zinc particles with an average particle size of 0.3 ra.
得られた亜鉛粒を、ローラ間隔０．１層層に調節したロ
ーラプレス機に通した。概ね第２図に示した形状の亜鉛
粒（偏平部分の面積的３０％）が約７０％得られた。The obtained zinc particles were passed through a roller press machine whose roller spacing was adjusted to 0.1 layer. Approximately 70% of the zinc grains having the shape shown in FIG. 2 (30% in area of the flat portion) were obtained.
（２）電池の短絡電流の測定
（１）で得られた噴霧亜鉛粒を負極として、常法にした
がって、ＬＲＢ型アシアルカリマンガン電池０個製作し
た。(2) Measurement of short-circuit current of batteries Using the atomized zinc particles obtained in (1) as a negative electrode, zero LRB-type acyal-alkaline manganese batteries were manufactured according to a conventional method.
これら電池につき、−２０℃で短絡電流を測定しその結
果を表に示した。なお、比較のために、ローラプレスを
施さなかった亜鉛粒を負極とするＬＲＢ型アシアルカリ
マンガン電池果も併記した。The short circuit current of these batteries was measured at -20°C and the results are shown in the table. For comparison, an LRB type acyalkaline manganese battery using zinc grains as a negative electrode that was not subjected to roller pressing is also shown.
〔発明の効果］
以上の説明で明らかなように、本発明の噴霧亜鉛粒はア
ルカリ電池の負極として用いたとき、粒間接触を高める
ため電池の放電特性を向上させて有用である。[Effects of the Invention] As is clear from the above description, when the sprayed zinc particles of the present invention are used as the negative electrode of an alkaline battery, they are useful because they increase interparticle contact and improve the discharge characteristics of the battery.
第１図、第２図はいずれも、本発明の噴霧亜鉛粒の形状
を例示する模式図である。
１．２・・・亜鉛粒FIG. 1 and FIG. 2 are both schematic diagrams illustrating the shape of the atomized zinc particles of the present invention. 1.2...Zinc grains
Claims (1)
とする噴霧亜鉛粒。Sprayed zinc particles characterized in that at least a part of the surface has a flat shape.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59185415A JPS6164075A (en) | 1984-09-06 | 1984-09-06 | atomized zinc particles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59185415A JPS6164075A (en) | 1984-09-06 | 1984-09-06 | atomized zinc particles |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6164075A true JPS6164075A (en) | 1986-04-02 |
Family
ID=16170385
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59185415A Pending JPS6164075A (en) | 1984-09-06 | 1984-09-06 | atomized zinc particles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6164075A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123782U (en) * | 1991-04-23 | 1992-11-10 | ダイハツ工業株式会社 | Automobile rear body structure |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5048427A (en) * | 1973-09-03 | 1975-04-30 |
-
1984
- 1984-09-06 JP JP59185415A patent/JPS6164075A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5048427A (en) * | 1973-09-03 | 1975-04-30 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04123782U (en) * | 1991-04-23 | 1992-11-10 | ダイハツ工業株式会社 | Automobile rear body structure |
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