JPH0824041B2 - Nickel plate manufacturing method - Google Patents
Nickel plate manufacturing methodInfo
- Publication number
- JPH0824041B2 JPH0824041B2 JP2130802A JP13080290A JPH0824041B2 JP H0824041 B2 JPH0824041 B2 JP H0824041B2 JP 2130802 A JP2130802 A JP 2130802A JP 13080290 A JP13080290 A JP 13080290A JP H0824041 B2 JPH0824041 B2 JP H0824041B2
- Authority
- JP
- Japan
- Prior art keywords
- nickel
- electrode plate
- active material
- nickel electrode
- cobalt
- 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
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 title description 44
- 229910052759 nickel Inorganic materials 0.000 title description 22
- 238000004519 manufacturing process Methods 0.000 title description 6
- 239000011149 active material Substances 0.000 description 11
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 238000006243 chemical reaction Methods 0.000 description 6
- BFDHFSHZJLFAMC-UHFFFAOYSA-L nickel(ii) hydroxide Chemical compound [OH-].[OH-].[Ni+2] BFDHFSHZJLFAMC-UHFFFAOYSA-L 0.000 description 5
- 239000007800 oxidant agent Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 239000007864 aqueous solution Substances 0.000 description 4
- IVMYJDGYRUAWML-UHFFFAOYSA-N cobalt(II) oxide Inorganic materials [Co]=O IVMYJDGYRUAWML-UHFFFAOYSA-N 0.000 description 4
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 3
- 150000001869 cobalt compounds Chemical class 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- PLLZRTNVEXYBNA-UHFFFAOYSA-L cadmium hydroxide Chemical compound [OH-].[OH-].[Cd+2] PLLZRTNVEXYBNA-UHFFFAOYSA-L 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 2
- 239000008112 carboxymethyl-cellulose Substances 0.000 description 2
- 229910017052 cobalt Inorganic materials 0.000 description 2
- 239000010941 cobalt Substances 0.000 description 2
- GUTLYIVDDKVIGB-UHFFFAOYSA-N cobalt atom Chemical compound [Co] GUTLYIVDDKVIGB-UHFFFAOYSA-N 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000008151 electrolyte solution Substances 0.000 description 2
- 238000005755 formation reaction Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 229920000609 methyl cellulose Polymers 0.000 description 2
- 239000001923 methylcellulose Substances 0.000 description 2
- 235000010981 methylcellulose Nutrition 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- -1 cobalt oxyhydroxide Chemical compound 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001882 dioxygen Inorganic materials 0.000 description 1
- 238000004090 dissolution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000004745 nonwoven fabric Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001226 reprecipitation Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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 本発明はアルカリ蓄電池に用いるニッケル極板の製造
法に関するものである。TECHNICAL FIELD The present invention relates to a method for producing a nickel electrode plate used in an alkaline storage battery.
従来技術とその問題点 従来、ペースト式ニッケル極板は、水酸化ニッケルに
１〜30wt％の一酸化コバルト（以下CoO）を混合し、メ
チルセルロース（MC）、カルボキシメチルセルロース
（CMC）等の水溶液でペーストとし、これをニッケル繊
維多孔体に充填していた。このニッケル極板はCoOを電
解液中で溶解させ、β−Co（OH）２としてニッケル繊維
集電体及びニッケル活物質の周囲に再析出させる。この
ために、通常１〜３日程度の注液後静置するエージング
工程が必要であった。その後充電によりβ−CoOOHの導
電性ネットワークを形成し、放電性能の優れたニッケル
極板とするものであった。エージング工程がないと、Co
Oの溶解反応（ａ）や、β−Co（OH）２の析出反応
（ｂ）が殆どできなくなり、導電性ネットワークの形成
反応（ｃ）、（ｄ）が困難となり、活物質の利用率が低
下する。Prior art and problems related art, a paste-type nickel electrode plate, an aqueous solution such as a mixture of 1-30 wt% of cobalt monoxide in a nickel hydroxide (hereinafter C o O), methyl cellulose (MC), carboxymethyl cellulose (CMC) To form a paste, which was filled in a nickel fiber porous body. The nickel plate is dissolved C o O in an electrolytic solution, β-C o (OH) 2 as reprecipitation around the nickel fiber current collector and the nickel active material. For this reason, an aging step of injecting the solution for about 1 to 3 days and then allowing it to stand is usually required. Then forming a conductive network of β-C o OOH by the charging was achieved, thereby an excellent nickel plate of discharge performance. Without aging process, C o
The dissolution reaction of O (a) and the precipitation reaction of β-C o (OH) 2 (b) are almost impossible, and the formation reactions (c) and (d) of the conductive network become difficult, resulting in the utilization rate of the active material. Is reduced.
CoO＋OH-→HCoO2 - ……（ａ） HCoO2 -＋2H2O→β−Co（OH）２＋OH- ……（ｂ） HCoO2 -→CoOOH＋e- ……（ｃ） β−Co（OH）２→β−CoOOH＋H2O＋e- ……（ｄ） そのためにエージング時間を十分とり、その後充電に
より化成する必要がある。しかしコバルトの溶解度が低
く、電解液量も少ないので十分な溶解をすることができ
ない。そのために完全なコバルトの導電性ネットワーク
の形成には、数サイクルの充放電を繰返す必要があり、
生産性が悪かった。 C o O + OH - → HC o O 2 - ...... (a) HC o O 2 - + 2H 2 O → β-C o (OH) 2 + OH - ...... (b) HC o O 2 - → C o OOH + e - ... ... (c) β-C o (OH) 2 → β-C o OOH + H 2 O + e - ...... (d) enough to take the aging time for that, it is necessary to conversion by the subsequent charging. However, since the solubility of cobalt is low and the amount of electrolytic solution is small, it cannot be sufficiently dissolved. Therefore, to form a complete cobalt conductive network, it is necessary to repeat charging and discharging for several cycles.
Productivity was bad.
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、 活物質利用率の優れた、生産効率の高い、 化成が不要である安価なニッケル極板を提供すること
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 conventional problems, and an object of the present invention is to provide an inexpensive nickel electrode plate having excellent utilization ratio of active material, high production efficiency, and no need for chemical conversion. It is a thing.
発明の構成 本発明は上記目的を達成するべく、 水酸化ニッケルにコバルト化合物をアルカリ水溶液中
で混合し、水酸化ニッケル表面上にコバルト化合物を被
覆させる。In order to achieve the above object, the present invention mixes nickel hydroxide with a cobalt compound in an alkaline aqueous solution to coat the nickel hydroxide surface with the cobalt compound.
次にこの活物質を酸化剤により酸化し、オキシ水酸化
コバルトを被覆したニッケル活物質とし、これを用いた
ことを特徴とするニッケル極板の製造法である。Then, the active material is oxidized with an oxidizing agent to form a nickel active material coated with cobalt oxyhydroxide, and the nickel active material is used.
尚、コバルト化合物が一酸化コバルトである前記ニッ
ケル極板の製造法である。In addition, it is a method for producing the nickel electrode plate in which the cobalt compound is cobalt monoxide.
尚、酸化剤がK2S2O8である前記ニッケル極板の製造法
である。The method for producing the nickel electrode plate is that the oxidizing agent is K 2 S 2 O 8 .
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CoOを重量比95:5の
割合で混合した。この混合活物質を比重1.25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。Cadmium hydroxide spherical nickel hydroxide containing 5 wt%, a particle size 1 [mu] m, surface area 70m 2 / g of C o O weight ratio of 95 were mixed at a ratio of 5. This mixed active material was put in an aqueous solution mainly containing a specific gravity of 1.25 potassium hydroxide and sufficiently stirred.
次にK2S2O8をCoOのモル数以上で且つ酸素ガスが発生
するまで加えた。混合活物質を過し、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ニッケル
極板とした。ペースト式カドミウム極板からなる負極板
とポリアミド系不織布と前記ニッケル極板とを組合せ
て、比重1.25の水酸化カリウム水溶液を注液し、公称容
量2.0Ahの電池を得た。Next, K 2 S 2 O 8 was added until the number of moles of Co 2 O 3 was exceeded and oxygen gas was generated. The mixed active material was passed, washed with water 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, and the surface was coated with Teflon to obtain a nickel electrode plate. A negative electrode plate made of a paste-type cadmium electrode plate, a polyamide-based nonwoven fabric, and the nickel electrode plate were combined, and a potassium hydroxide aqueous solution having a specific gravity of 1.25 was injected to obtain a battery having a nominal capacity of 2.0 Ah.
比較のために、水酸化カドミウムを5wt％含有する球
状水酸化ニッケルをCMC溶液でペースト状として同様の
ニッケル極板を得た。（酸化していない活物質）この未
化成のニッケル極板と前記のペースト式カドミウム極板
を用いて、組込み注液後エージングし、化成充電し従来
品の電池を得た。For comparison, spherical nickel hydroxide containing 5 wt% of cadmium hydroxide was made into a paste with a CMC solution to obtain a similar nickel electrode plate. (Non-oxidized active material) Using this unformed nickel electrode plate and the above-mentioned paste-type cadmium electrode plate, injection was carried out after assembly, aging, and formation charging was carried out to obtain a conventional battery.
本発明のニッケル極板を用いた電池（本発明）と従来
のニッケル極板を用いた電池（従来品）を用いて、 の放電特性を調べ、その結果を第１図に示した。Using a battery using the nickel electrode plate of the present invention (the present invention) and a battery using the conventional nickel electrode plate (conventional product), The discharge characteristics were investigated and the results are shown in FIG.
尚、充電々流0.1CAで11時間充電し、放電々流0.2CAで
放電した。It should be noted that the charging was carried out at a charging current of 0.1 CA for 11 hours, and the discharging current was discharged at 0.2 CA.
本発明では、 から放電容量が一定であり、放電時間に優れている。In the present invention, Therefore, the discharge capacity is constant and the discharge time is excellent.
一方、従来品では放電容量の安定化に を要した。これは従来品では、CoOが電気的に充電した
ときに初期において完全にCoOOHにならず、導電効率が
低いため充放電反応が充分できない。これに対して、本
発明ではニッケル極活物質が酸化剤によりCoOをすべてC
oOOHに変化させ、完全な導電性ネットワークが形成され
るためである。On the other hand, the conventional product has a stable discharge capacity. Needed. This is the conventional product, C o O does not become completely C o OOH in the initial when charged electrically, charge and discharge reaction can not be sufficiently due to the low collection efficiency guide. In contrast, all of the C o O a nickel electrode active material is an oxidizing agent in the present invention C
This is because a completely conductive network is formed by changing to oOH.
尚、上記実施例に於て酸化剤としてK2S2O8を用いた
が、同等の酸化力を持つ酸化剤例えばNa2S2O8,（NH4）2
S2O8等であれば同様な効果が得られる。K2S2O8は酸化力
に優れ、安全で取扱いが容易で安価であり最もよい。Although K 2 S 2 O 8 was used as the oxidizing agent in the above-mentioned examples, an oxidizing agent having an equivalent oxidizing power such as Na 2 S 2 O 8 , (NH 4 ) 2
Similar effects can be obtained with S 2 O 8 or the like. K 2 S 2 O 8 is the best because it has excellent oxidizing power, is safe, is easy to handle, and is inexpensive.
発明の効果 上述した如く、本発明は活物質利用率の優れた、生産
効率の高い、化成が不要である安価なニッケル極板を提
供することが出来るので、その工業的価値は大である。EFFECTS OF THE INVENTION As described above, the present invention can provide an inexpensive nickel electrode plate having an excellent utilization rate of an active material, a high production efficiency, and no need for chemical conversion, so that its industrial value is great.
第１図は本発明の電池と従来品の電池の放電特性の比較
図である。FIG. 1 is a comparison diagram of the discharge characteristics of the battery of the present invention and a conventional battery.
Claims (3)
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用いたことを特徴と
するニッケル極板の製造法。1. A method for producing a nickel electrode plate, characterized in that a nickel hydroxide active material coated with cobalt oxyhydroxide is used by oxidizing an active material obtained by mixing a cobalt compound with nickel hydroxide with an oxidizing agent.
求項１記載のニッケル極板のの製造法。2. The method for producing a nickel electrode plate according to claim 1, wherein the cobalt compound is cobalt monoxide.
ケル極板の製造法。3. The method for producing a nickel electrode plate according to claim 1, wherein the oxidizing agent is K 2 S 2 O 8 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2130802A JPH0824041B2 (en) | 1990-05-21 | 1990-05-21 | Nickel plate manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2130802A JPH0824041B2 (en) | 1990-05-21 | 1990-05-21 | Nickel plate manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0426058A JPH0426058A (en) | 1992-01-29 |
| JPH0824041B2 true JPH0824041B2 (en) | 1996-03-06 |
Family
ID=15043053
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2130802A Expired - Lifetime JPH0824041B2 (en) | 1990-05-21 | 1990-05-21 | Nickel plate manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0824041B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE69232392T2 (en) * | 1991-10-21 | 2002-08-29 | Yuasa Corp., Takatsuki | METHOD FOR PRODUCING A NICKEL PLATE AND AN ALKALINE BATTERY |
| JP3429741B2 (en) | 2000-03-24 | 2003-07-22 | 松下電器産業株式会社 | Paste positive electrode for alkaline storage batteries and nickel-metal hydride storage batteries |
| JP3558590B2 (en) | 2000-07-14 | 2004-08-25 | 松下電器産業株式会社 | Method for producing positive electrode active material for alkaline storage battery |
-
1990
- 1990-05-21 JP JP2130802A patent/JPH0824041B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0426058A (en) | 1992-01-29 |
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