JPH0824042B2 - Nickel-metal hydride storage battery manufacturing method - Google Patents
Nickel-metal hydride storage battery manufacturing methodInfo
- Publication number
- JPH0824042B2 JPH0824042B2 JP2253371A JP25337190A JPH0824042B2 JP H0824042 B2 JPH0824042 B2 JP H0824042B2 JP 2253371 A JP2253371 A JP 2253371A JP 25337190 A JP25337190 A JP 25337190A JP H0824042 B2 JPH0824042 B2 JP H0824042B2
- Authority
- JP
- Japan
- Prior art keywords
- nickel
- active material
- storage battery
- electrode plate
- hydrogen storage
- 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.)
- Expired - Lifetime
Links
Classifications
-
- 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
- Battery Electrode And Active Subsutance (AREA)
Description
【発明の詳細な説明】 産業上の利用分野 本発明はニッケル水素蓄電池の製造法に関するもので
ある。TECHNICAL FIELD The present invention relates to a method for manufacturing a nickel-hydrogen storage battery.
近年、ポータブルエレクトロニクス機器などの軽量化
が急速に進む中でその電源としてニッケル水素蓄電池が
注目され、この電池の高エネルギー密度化が要望されて
いる。In recent years, as the weight of portable electronic devices and the like has been rapidly reduced, nickel-hydrogen storage batteries have been attracting attention as a power source thereof, and higher energy density of these batteries has been demanded.
この電池のニッケル極は従来焼結式極板と称される、
ニッケル粉末を穿孔鋼板等に焼結した多孔性基板に水酸
化ニッケルを主成分とした活物質を充填したものが用い
られてきた。この方式の極板は、活物質充填工程が非常
に煩雑であり、生産コストが高くなる。The nickel electrode of this battery is conventionally called a sintered electrode plate,
A porous substrate obtained by sintering nickel powder on a perforated steel plate or the like and filled with an active material containing nickel hydroxide as a main component has been used. In this type of electrode plate, the active material filling process is very complicated and the production cost is high.
しかも多孔性基板の多孔度が80％程度に限定されるた
め、活物質の充填密度が低くエネルギー密度400mAh/cc
程度の極板しか得られない。このためニッケル水素蓄電
池の特徴である高エネルギー密度をさらに高めるには不
適であった。Moreover, since the porosity of the porous substrate is limited to about 80%, the packing density of the active material is low and the energy density is 400 mAh / cc.
You can only get a certain degree of plate. Therefore, it was unsuitable for further increasing the high energy density, which is a feature of nickel-hydrogen storage batteries.
この電池のニッケル極には、この他に耐アルカリ性高
多孔度基体に活物質である水酸化ニッケル粉末と金属コ
バルトあるいは酸化コバルト粉末を混合し、CMC溶液で
ペースト状とし、前記基体に充填するペースト式極板が
ある。ペースト式ニッケル極は未化成のまま組込み、注
液後24時間以上のエージング工程を経て、コバルト添加
剤をHCoC2 -→β−Co（OH）２の反応により溶解−再析出
させた。その後初充電によりβ−Co（OH）２→βCoOOH
の反応により導電率の高いオキシ水酸化コバルトに変化
させる。これによって集電体と水酸化ニッケル粒子間の
電子の流れをスムーズにし、活物質利用率を増大させる
ものである。しかしこの方法ではエージングに時間を要
し、生産性が悪い。又、添加物のCoOは空気中で放置す
ると酸化によりCo3O4となり安定した電池性能が得られ
ないという問題がある。In addition to the above, the nickel electrode of this battery is a paste to be mixed with an alkali-resistant high-porosity substrate and nickel hydroxide powder as an active material and metallic cobalt or cobalt oxide powder to form a paste with a CMC solution, and to fill the substrate. There is a formula electrode plate. Paste-type nickel electrode is via the left built, liquid injection after 24 hours of aging step unformed, the cobalt additive HCoC 2 - reprecipitated - → β-Co (OH) dissolved by 2 reactions. After that, by first charging β-Co (OH) 2 → βCoOOH
Is converted into cobalt oxyhydroxide having a high conductivity by the reaction of. This makes the flow of electrons between the current collector and the nickel hydroxide particles smooth and increases the utilization rate of the active material. However, this method requires a long time for aging and has poor productivity. Further, there is a problem that when the additive CoO is left in the air, it becomes Co 3 O 4 by oxidation and stable battery performance cannot be obtained.
発明の目的 本発明は上記従来の問題点に鑑みなされたものであ
り、高性能で且つ生産性の高いニッケル水素蓄電池を提
供することを目的とするものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to provide a nickel-hydrogen storage battery having high performance and high productivity.
発明の構成 本発明は上記目的を達成するべく、 水酸化ニッケルを主成分とする活物質に一酸化コバル
トをアルカリ電解液中で混合し水酸化ニッケル上にコバ
ルト化合物を被覆させた後、活物質を酸化剤により酸化
し、オキシ水酸化コバルトが被覆した水酸化ニッケル活
物質を充填したニッケル極板を形成し、水素極と組込ん
だことを特徴とするニッケル水素蓄電池の製造法であ
る。According to the present invention, in order to achieve the above object, an active material containing nickel hydroxide as a main component is mixed with cobalt monoxide in an alkaline electrolyte to coat nickel hydroxide with a cobalt compound. Is oxidized by an oxidizing agent to form a nickel electrode plate filled with a nickel hydroxide active material coated with cobalt oxyhydroxide, and the nickel electrode plate is incorporated with a hydrogen electrode.
尚、酸化剤がK2S2O8、Na2S2O8、（NH4）2S2O8、H2O2
である前記のニッケル水素蓄電池の製造法である。The oxidizing agents are K 2 S 2 O 8 , Na 2 S 2 O 8 , (NH 4 ) 2 S 2 O 8 and H 2 O 2.
Which is the method for producing the nickel-hydrogen storage battery.
実施例 以下、本発明の詳細について一実施例により説明す
る。Examples Hereinafter, details of the present invention will be described by way of examples.
水酸化カドミウムを5wt％含有する球状水酸化ニッケ
ルに粒径１μｍ、表面積70m2/gの一酸化コバルトを重量
比95:5の割合で混合した。この混合活物質を比重1.35の
水酸化カリウムを主体とする水溶液に入れ充分に撹拌し
た。Spherical nickel hydroxide containing 5 wt% of cadmium hydroxide was mixed with cobalt monoxide having a particle size of 1 μm and a surface area of 70 m 2 / g at a weight ratio of 95: 5. This mixed active material was put into an aqueous solution containing potassium hydroxide having a specific gravity of 1.35 as a main component and sufficiently stirred.
次にK2S2O8を一酸化コバルトのモル数以上で且つ酸素
ガスが発生するまで加えた。この混合活物質を濾過し、
水洗・乾燥した。この活物質をCMC溶液でペースト状と
し、ニッケル繊維多孔体に充填した。その後80℃で１時
間乾燥した後プレスし、表面にテフロンコーティングを
行い本発明に用いるニッケル極板を得た。Next, K 2 S 2 O 8 was added until the number of moles of cobalt monoxide was not less than and oxygen gas was generated. The mixed active material is filtered,
Washed and dried. This active material was made into a paste with a CMC solution and filled in a nickel fiber porous body. After that, it was dried at 80 ° C. for 1 hour and then pressed to coat the surface with Teflon to obtain a nickel electrode plate used in the present invention.
このニッケル極板とMm Ni4.2Al0.3Co0.5（Mm:ミッシ
ュメタル：希土類元素の混合物）の水素吸蔵合金からな
るペースト式の水素吸蔵極板、ポリプロピレン不織布セ
パレータで発電要素を構成し、比重1.26の水酸化カリウ
ムを主体とする電解液を注入し、本発明の電池を得た。This nickel electrode plate and a hydrogen storage alloy paste of Mm Ni 4.2 Al 0.3 Co 0.5 (Mm: Misch metal: mixture of rare earth elements) made of a hydrogen storage alloy, and a polypropylene non-woven separator make up a power generation element with a specific gravity of 1.26. An electrolytic solution containing potassium hydroxide as a main component was injected to obtain a battery of the present invention.
比較のために、水酸化カドミウムを5wt％含有する球
状水酸化ニッケルに粒径１μｍ、表面積70m2/gの一酸化
コバルトを重量比95:5の割合で混合し、CMC溶液でペー
スト状として、従来のニッケル極板を得た。（酸化剤で
酸化しない活物質）この従来のニッケル極板を用いて、
未化成状態で前記と同様のニッケル水素蓄電池を組立て
た。For comparison, spherical nickel hydroxide containing 5 wt% of cadmium hydroxide was mixed with a particle size of 1 μm and a surface area of 70 m 2 / g of cobalt monoxide at a weight ratio of 95: 5, and made into a paste with a CMC solution. A conventional nickel electrode plate was obtained. (Active material that does not oxidize with an oxidizing agent) Using this conventional nickel electrode plate,
A nickel hydride storage battery similar to the above was assembled in an unformed state.
これらの電池を用いて、充電々流300mAで10.5時間充
電し、放電々流600mAで終止電圧1.00Vまで放電した。充
放電サイクルを繰返した時の活物質利用率との関係を第
１図に示した。Using these batteries, charging was performed at a flowing current of 300 mA for 10.5 hours, and discharging was performed at a discharging current of 600 mA to a final voltage of 1.00 V. The relationship with the active material utilization rate when the charge / discharge cycle was repeated is shown in FIG.
本発明の電池はサイクル初期から活物質利用率が高く
その効果が顕著である。本発明の活物質は酸化処理によ
りCoOがニッケル活物質表面にβ−CoOOHが形成され完全
な導電性ネットワークが形成されるためである。The battery of the present invention has a high utilization rate of the active material from the beginning of the cycle, and its effect is remarkable. This is because in the active material of the present invention, CoO is formed by β-CoOOH on the surface of the nickel active material by the oxidation treatment to form a complete conductive network.
上記実施例において、K2S2O8の酸化剤について記した
が、Na2S2O8、（NH4）2S2O8、H2O2であっても同様の効
果が得られた。In the above examples, the oxidizing agent for K 2 S 2 O 8 was described, but the same effect can be obtained with Na 2 S 2 O 8 , (NH 4 ) 2 S 2 O 8 and H 2 O 2. It was
又、この活物質を空気中に保存した後、使用した電池
も前記と同様の効果を得た。Also, after storing this active material in the air, the battery used also obtained the same effect as described above.
前記実施例においては、集電体としてニッケル繊維多
孔体を用いたが、穿孔鋼板を加工したポケット式極板あ
るいは、活物質をプレス成型して用いるプレス式極板に
用いた場合、従来品の活物質では活物質利用率が50〜60
％であるが、本発明の活物質を用いた場合、活物質利用
率が90％であった。In the above-mentioned examples, the nickel fiber porous body was used as the current collector, but when used for a pocket type electrode plate processed by a perforated steel plate or a press type electrode plate used by press molding an active material, Active material utilization rate is 50-60
%, The active material utilization rate was 90% when the active material of the present invention was used.
発明の効果 上述した如く、本発明は高性能で且つ生産性の高いニ
ッケル水素蓄電池を提供することが出来るので、その工
業的価値は極めて大である。EFFECTS OF THE INVENTION As described above, the present invention can provide a nickel-metal hydride storage battery with high performance and high productivity, so that its industrial value is extremely large.
第１図は本発明の電池と従来品の電池の活物質利用率の
比較を示した図である。FIG. 1 is a diagram showing a comparison of active material utilization rates of a battery of the present invention and a conventional battery.
Claims (2)
酸化コバルトを混合した活物質を酸化剤により酸化し、
オキシ水酸化コバルトが被覆した水酸化ニッケル活物質
を充填したニッケル極板を形成し、水素極と組込んだこ
とを特徴とするニッケル水素蓄電池の製造法。1. An active material obtained by mixing cobalt monoxide with an active material containing nickel hydroxide as a main component is oxidized by an oxidizing agent,
A method for producing a nickel-hydrogen storage battery, comprising forming a nickel electrode plate filled with a nickel hydroxide active material coated with cobalt oxyhydroxide and incorporating the nickel electrode plate with a hydrogen electrode.
2O8、H2O2である請求項１記載のニッケル水素蓄電池の
製造法。2. An oxidizing agent is K 2 S 2 O 8 , Na 2 S 2 O 8 or (NH 4 ) 2 S.
The method for producing a nickel-hydrogen storage battery according to claim 1, wherein the nickel-hydrogen storage battery is 2 O 8 or H 2 O 2 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2253371A JPH0824042B2 (en) | 1990-09-19 | 1990-09-19 | Nickel-metal hydride storage battery manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2253371A JPH0824042B2 (en) | 1990-09-19 | 1990-09-19 | Nickel-metal hydride storage battery manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04129171A JPH04129171A (en) | 1992-04-30 |
| JPH0824042B2 true JPH0824042B2 (en) | 1996-03-06 |
Family
ID=17250425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2253371A Expired - Lifetime JPH0824042B2 (en) | 1990-09-19 | 1990-09-19 | Nickel-metal hydride storage battery manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0824042B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69232392T2 (en) * | 1991-10-21 | 2002-08-29 | Yuasa Battery Co Ltd | METHOD FOR PRODUCING A NICKEL PLATE AND AN ALKALINE BATTERY |
-
1990
- 1990-09-19 JP JP2253371A patent/JPH0824042B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04129171A (en) | 1992-04-30 |
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