发明名称 |
Nickel electrode active material; a nickel electrode and a nickel alkali storage cell using such nickel electrode active material; and production methods of such material, electrode, and cell |
摘要 |
Fine-grained nickel electrode active material, each of which contributing to electrode reaction; production method of the fine-grained nickel electrode active material; and a nickel alkali storage cell of high capacity which is excellent in over discharge characteristics. In order to produce the fine-grained nickel electrode active material, fine-grained nickel hydroxide is precipitated by adding a given amount of alkali to solution in which at least a nickel compound is dissolved while the solution is stirred. Each of the fine-grained nickel hydroxide has pores with 20 vol % or more of a combined volume of the pores being composed of pores of diameter 60 ANGSTROM or greater. Next, a given amount of alkali is gradually added to suspension including the fine-grained nickel hydroxide and dissolved cobalt compound so that cobalt hydroxide is precipitated on the external surface of the fine-grained nickel hydroxide. The fine-grained nickel electrode active material is produced in the above mentioned way. Each of the fine-grained nickel electrode active material comprises a nickel hydroxide and cobalt oxide having distorted crystal structure and oxidation number higher than +2. The nickel hydroxide has pores whose diameters are 60 ANGSTROM or greater. And the volume of such pores amounts to 20 vol % or more of the combined volume of all of the pores.
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申请公布号 |
US5629111(A) |
申请公布日期 |
1997.05.13 |
申请号 |
US19950529980 |
申请日期 |
1995.09.19 |
申请人 |
SANYO ELECTRIC CO. LTD. |
发明人 |
YAMAWAKI, AKIFUMI;NAKAHORI, SHINSUKE;TADOKORO, MOTOO;HAMAMATSU, TAKEO;BABA, YOSHITAKA |
分类号 |
H01M4/42;H01M4/32;H01M4/52;H01M10/30;(IPC1-7):H01M4/32;H01M4/58 |
主分类号 |
H01M4/42 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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