Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Electrode
Patent
1994-11-30
1996-03-19
Willis, Jr., Prince
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Electrode
H01M 452
Patent
active
055003095
ABSTRACT:
The positive electrode of a Ni/metal hydride accumulator is formed from a mass mixture of Ni(OH).sub.2 and an oxidation-resistant graphite. The stable graphite is notable for a high degree of crystallinity and a low ash content. In conventional Ni/metal hydride accumulators, cobalt compounds play an essential part in developing a conductive matrix within their positive nickel hydroxide electrodes, leading to reductive destruction of the matrix by severe high temperature short circuit testing. In contrast, the same accumulators, with positive electrodes produced according to the present invention, survive the test with only a temporary and slight decline in capacity.
REFERENCES:
patent: 4130696 (1978-12-01), Gunter
patent: 4514473 (1985-04-01), Atkin et al.
patent: 4663256 (1987-05-01), Corrigan
patent: 4935318 (1990-06-01), Ikoma et al.
patent: 5032475 (1991-07-01), Hasebe et al.
Japanese Kokai; 63-334, Jan. 5, 1988, Production of Resin-Bonded Carbon Molding, Abstract.
Hofmann Gunter
Kleinsorgen Klaus
Lichtenberg Frank
Lilley, Jr. Richard H.
Varta Batterie Aktiengesellschaft
Willis Jr. Prince
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