JPH0569264B2 - - Google Patents
Info
- Publication number
- JPH0569264B2 JPH0569264B2 JP63299067A JP29906788A JPH0569264B2 JP H0569264 B2 JPH0569264 B2 JP H0569264B2 JP 63299067 A JP63299067 A JP 63299067A JP 29906788 A JP29906788 A JP 29906788A JP H0569264 B2 JPH0569264 B2 JP H0569264B2
- Authority
- JP
- Japan
- Prior art keywords
- powder
- metal
- amount
- electrode
- cadmium
- 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
-
- 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
-
- 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
- H01M4/24—Electrodes for alkaline accumulators
- H01M4/32—Nickel oxide or hydroxide 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
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- 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、アルカリ蓄電池用ニツケル電極とこ
れを用いたアルカリ蓄電池に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a nickel electrode for an alkaline storage battery and an alkaline storage battery using the same.
従来の技術
アルカリ蓄電池に用いられるニツケル電極とし
て、耐アルカリ性金属繊維多孔体に、水酸化ニツ
ケル活物質をスラリー状として充填するペースト
式極板がある。BACKGROUND ART As a nickel electrode used in an alkaline storage battery, there is a paste-type electrode plate in which an alkali-resistant metal fiber porous body is filled with a nickel hydroxide active material in the form of a slurry.
しかしこれらペースト式極板に於いては、活物
質の利用率向上のために、CoO、β−Co（OH）2
α−Co（OH）2等の二価Co化合物粉末の添加が行
なわれている。 However, in these paste-type electrode plates, in order to improve the utilization rate of active materials, CoO, β-Co(OH) 2
Addition of divalent Co compound powder such as α-Co(OH) 2 is being carried out.
発明が解決しようとする課題
二価Co化合物は、アルカリ電解液中で溶解し、
二価のblue complex ionを生成する。それらは、
貴な電位に於いて三価のCoOOH化合物に変化
し、活物質表面に導電性ネツトワークを形成す
る。これら電極を用いて電池を構成した場合、対
極であるカドミウム負極では、ニツケル正極での
コバルト化合物の酸化量に相当する水酸化カドミ
ウムの金属カドミウムへの還元を生じる。酸化生
成したCoOOHは、電気化学的に不可逆であるた
め、カドミウム負極には正極でのコバルト化合物
の酸化量に相当する金属カドミウムが残存するこ
ととなり、これが放電リザーブとして利用され
る。しかしこのようにして得られる放電リザーブ
量は、その量が限られるため、高温用電池の如
く、多くの放電リザーブ量を必要とする場合には
十分でない。Problem to be solved by the invention A divalent Co compound dissolves in an alkaline electrolyte,
Generates bivalent blue complex ions. They are,
At a higher potential, it transforms into a trivalent CoOOH compound, forming a conductive network on the surface of the active material. When a battery is constructed using these electrodes, at the cadmium negative electrode that is the counter electrode, cadmium hydroxide is reduced to metallic cadmium in an amount equivalent to the amount of cobalt compound oxidized at the nickel positive electrode. Since the oxidized CoOOH is electrochemically irreversible, metallic cadmium equivalent to the amount of oxidized cobalt compound at the positive electrode remains at the cadmium negative electrode, and this is used as a discharge reserve. However, the amount of discharge reserve obtained in this way is limited and is not sufficient in cases where a large amount of discharge reserve is required, such as in high-temperature batteries.
従来、放電リザーブ量を多く必要とする場合に
は、電池の組立て前にカドミウム負極を部分充電
するか、金属カドミウム粉末を添加する等により
放電リザーブを形成する方法が取られている。し
かし、部分充電法はその製造工程が煩雑であり、
またバラツキも大きいという欠点を有する。Conventionally, when a large amount of discharge reserve is required, a method of forming the discharge reserve by partially charging the cadmium negative electrode or adding metal cadmium powder before assembling the battery has been adopted. However, the manufacturing process of the partial charging method is complicated;
It also has the disadvantage of large variations.
一方、金属カドミウム粉末は取り扱いや価格の
点で問題がある。 On the other hand, metal cadmium powder has problems in terms of handling and price.
本発明は活物質利用率の向上した高性能で、生
産性の高いニツケル電極とこれを用いたカドミウ
ム負極の放電リザーブ量を調節することができる
アルカリ蓄電池を提供することを目的とする。 An object of the present invention is to provide a high-performance, highly productive nickel electrode with improved active material utilization and an alkaline storage battery using the same that can adjust the discharge reserve of a cadmium negative electrode.
課題を解決するための手段
本発明は上記目的を達成するべく、耐アルカリ
性繊維多孔体に、水酸化ニツケル粉末を主体と
し、CoO、β−Co（OH）2、α−Co（OH）2粉末の
一種以上と金属Co粉末を添加することを特徴と
したニツケル電極である。Means for Solving the Problems In order to achieve the above object, the present invention uses nickel hydroxide powder as a main ingredient in an alkali-resistant fibrous porous body, and contains CoO, β-Co(OH) 2 , α-Co(OH) 2 powder. This is a nickel electrode characterized by adding one or more of the above and metal Co powder.
又、前記ニツケル電極に添加するCoO、β−
Co（OH）2、α−Co（OH）2の二価Co化合物粉末と
金属Co粉末の割合により、対極カドミウム電極
の放電リザーブ量を調節することを特徴としたア
ルカリ蓄電池である。 In addition, CoO, β- added to the nickel electrode
This is an alkaline storage battery characterized by adjusting the discharge reserve amount of the counter cadmium electrode by adjusting the ratio of divalent Co compound powder such as Co(OH) 2 or α-Co(OH) 2 and metal Co powder.
実施例 以下、本発明の一実施例について詳述する。Example An embodiment of the present invention will be described in detail below.
水酸化ニツケル粉末に、CoO粉末と金属Co粉
末を合わせて水酸化ニツケル粉末の15wt％混合
した。金属Co粉末の割合は、添加物量に対し、
０，25，50，75，100wt％とした。 A combination of CoO powder and metal Co powder was mixed with nickel hydroxide powder at 15 wt% of the nickel hydroxide powder. The ratio of metal Co powder to the amount of additives is
It was set as 0, 25, 50, 75, and 100wt%.
これに１％のカルボキシメチルセルローズを溶
解した水溶液を加え流動性のペースト液を作成
し、多孔度95％、厚さ1.5mmのニツケル繊維基板
に充填し、乾燥、厚み調節により厚さ0.7mmのニ
ツケル極を得た。このニツケル極と対極としてペ
ースト式カドミウム極を組み合せて、ｄ＝
1.26KOHを注液しＣサイズの電池を得た。この
電池を24時間放置後、充電1/30CA×48時間、放
電1CA（終止電圧1.10V）温度45℃における電池
放電特性を比較した。第１図に電池放電特性を示
した。 An aqueous solution of 1% carboxymethyl cellulose was added to this to create a fluid paste solution, which was filled into a nickel fiber substrate with a porosity of 95% and a thickness of 1.5 mm, dried, and a thickness of 0.7 mm was prepared by adjusting the thickness. Obtained a nickel pole. By combining this nickel electrode and a paste-type cadmium electrode as a counter electrode, d=
A C size battery was obtained by injecting 1.26KOH. After this battery was left for 24 hours, the battery discharge characteristics were compared under charging 1/30CA x 48 hours and discharging 1CA (final voltage 1.10V) at a temperature of 45°C. Figure 1 shows the battery discharge characteristics.
第１図の結果より、金属Co割合の増加に伴な
つて、放電時間が延びており、金属Co割合が100
％の場合に最も優れた結果を示しているが、しか
しこの電池は漏液を起こしていた。金属Coの添
加割合は25〜75％の範囲が望ましい。尚、この範
囲では漏液を生じない。 From the results shown in Figure 1, the discharge time increases as the metal Co ratio increases, and when the metal Co ratio increases to 100
% showed the best results, but this battery was leaking. The addition ratio of metal Co is preferably in the range of 25 to 75%. Note that no leakage occurs within this range.
また、温度20℃において、0.1CAで完全充電
し、0.2CAで完全放電した後、残存金属カドミウ
ム量について調査した。第２図に残存金属カドミ
ウム量の分析結果を示した。第２図の結果より、
金属Co割合の増加に伴ない残存金属カドミウム
量が増加し、金属Co割合が100％の場合に最大と
なつた。残存金属カドミウム量の増加は、放電リ
ザーブ量が増加したことを示している。この結果
より、放電リザーブ量は混合するCoO粉末と金属
Co粉末の割合により調節が可能であることがわ
かつた。 Furthermore, after fully charging at 0.1 CA and completely discharging at 0.2 CA at a temperature of 20°C, the amount of residual metallic cadmium was investigated. Figure 2 shows the analysis results of the amount of residual metal cadmium. From the results in Figure 2,
The amount of residual metal cadmium increased as the metal Co ratio increased, and reached the maximum when the metal Co ratio was 100%. An increase in the amount of residual metal cadmium indicates that the amount of discharge reserve has increased. From this result, the amount of discharge reserve is determined by the amount of CoO powder and metal to be mixed.
It was found that adjustment was possible by adjusting the proportion of Co powder.
第１図と第２図より、放電時間の延びは放電リ
ザーブ量の増加のためであり、これはニツケル電
極に添加するCoO粉末と金属Co粉末の割合によ
り調節できることがわかつた。 From FIGS. 1 and 2, it was found that the lengthening of the discharge time was due to an increase in the amount of discharge reserve, and that this could be adjusted by adjusting the ratio of CoO powder and metal Co powder added to the nickel electrode.
尚、上記実施例において、二価Co化合物とし
てCoO粉末を用いたが、α−Co（OH）2、β−Co
（OH）2、又はこれらを二種以上組み合せたもの
を用いても同様の結果を得た。 In the above examples, CoO powder was used as the divalent Co compound, but α-Co(OH) 2 , β-Co
Similar results were obtained using (OH) 2 or a combination of two or more thereof.
上述した如く、ニツケル電極に添加する二価
Co化合物粉末と金属Co粉末の割合を予め調節し
ておくことで、必要に応じた放電リザーブ量を得
ることが出来るので、従来法と比べてカドミウム
極の部分還元等の過程が省略出来るので生産効率
が向上する。又、容易に放電リザーブ量を調節す
ることが出来る。 As mentioned above, the divalent added to the nickel electrode
By adjusting the ratio of Co compound powder and metal Co powder in advance, it is possible to obtain the required discharge reserve amount, and compared to conventional methods, processes such as partial reduction of the cadmium electrode can be omitted. Increased efficiency. Further, the amount of discharge reserve can be easily adjusted.
発明の効果
本発明は活物質利用率の向上した高性能で、生
産性の高いニツケル電極とこれを用いたカドミウ
ム負極の放電リザーブ量を調節することができる
アルカリ蓄電池を提供することができるので、そ
の工業的価値は極めて大である。Effects of the Invention The present invention can provide a high-performance, highly productive nickel electrode with improved active material utilization and an alkaline storage battery that can adjust the discharge reserve amount of a cadmium negative electrode using the same. Its industrial value is extremely large.
第１図はCoOと金属Coの割合と放電特性の関
係を示した図、第２図はCoOと金属Coの割合と
残存金属Cd量の関係を示した図である。
FIG. 1 is a diagram showing the relationship between the ratio of CoO and metal Co and discharge characteristics, and FIG. 2 is a diagram showing the relationship between the ratio of CoO and metal Co and the amount of residual metal Cd.
Claims (1)
粉末を主体とし、CoO、β−Co（OH）2、α−Co
（OH）2粉末の一種以上と金属Co粉末を添加する
ことを特徴としたニツケル電極。 ２ 請求項１記載のニツケル電極に添加する
CoO、β−Co（OH）2、α−Co（OH）2の二価Co化
合物粉末と金属Co粉末の割合により、対極カド
ミウム電極の放電リザーブ量を調節することを特
徴としたアルカリ蓄電池。[Claims] 1. An alkali-resistant fibrous porous body mainly composed of nickel hydroxide powder, containing CoO, β-Co(OH) 2 , α-Co
A nickel electrode characterized by the addition of one or more types of (OH) 2 powder and metal Co powder. 2 Added to the nickel electrode according to claim 1
An alkaline storage battery characterized in that the discharge reserve amount of a counter cadmium electrode is adjusted by the ratio of divalent Co compound powder of CoO, β-Co(OH) 2 , α-Co(OH) 2 and metal Co powder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63299067A JPH02144850A (en) | 1988-11-26 | 1988-11-26 | Nickel electrode and alkali battery using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63299067A JPH02144850A (en) | 1988-11-26 | 1988-11-26 | Nickel electrode and alkali battery using same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02144850A JPH02144850A (en) | 1990-06-04 |
| JPH0569264B2 true JPH0569264B2 (en) | 1993-09-30 |
Family
ID=17867773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63299067A Granted JPH02144850A (en) | 1988-11-26 | 1988-11-26 | Nickel electrode and alkali battery using same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02144850A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02216763A (en) * | 1989-02-16 | 1990-08-29 | Yuasa Battery Co Ltd | Alkaline storage battery and manufacture thereof |
| ATE143920T1 (en) * | 1993-08-12 | 1996-10-15 | Starck H C Gmbh Co Kg | COBALT COBALT OXIDE POWDER, METHOD FOR THE PRODUCTION THEREOF AND USE THEREOF |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5297127A (en) * | 1976-02-10 | 1977-08-15 | Japan Storage Battery Co Ltd | Method of manufacturing positive electrode plate for alkaline storage battery |
| JPS5854570A (en) * | 1981-09-28 | 1983-03-31 | Matsushita Electric Ind Co Ltd | Sealed alkaline storage battery |
| JPS6188453A (en) * | 1984-10-04 | 1986-05-06 | Matsushita Electric Ind Co Ltd | Nickel positive electrode for alkaline storage batteries |
| JPH0630248B2 (en) * | 1986-04-30 | 1994-04-20 | 株式会社ユアサコーポレーション | Nickel electrode for alkaline batteries |
-
1988
- 1988-11-26 JP JP63299067A patent/JPH02144850A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02144850A (en) | 1990-06-04 |
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