Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1997-06-24
1999-12-28
Nuzzolillo, Maria
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
429206, 4292181, H01M 432, H01M 424, H01M 426
Patent
active
060079460
ABSTRACT:
In the non-sintered nickel electrode for an alkaline storage battery according to the invention, a yttrium metal powder and/or a yttrium compound powder has been added to a particulate active material comprising composite particles each consisting of a nickel hydroxide core and a sodium-doped cobalt compound shell. Because the yttrium metal powder and/or yttrium compound powder inhibits the diffusion of cobalt into the nickel hydroxide core, the non-sintered nickel electrode of the invention exhibits a high utilization efficiency not only in an initial phase of charge-discharge cycling but over a long time of use. Moreover, because the yttrium metal powder and/or yttrium compound powder enhances the oxygen overpotential, the non-sintered nickel electrode for an alkaline storage battery according to the invention shows very satisfactory charge characteristics particularly at high temperatures.
REFERENCES:
patent: 5466543 (1995-11-01), Ikoma et al.
patent: 5523182 (1996-06-01), Ovshinsky et al.
patent: 5672447 (1997-09-01), Yamawaki et al.
Fujitani Shin
Inoue Masao
Nishio Koji
Nogami Mitsuzo
Satoguchi Kousuke
Martin Angela J.
Nuzzolillo Maria
Sanyo Electric Co,. Ltd.
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