Ni/metal hydride secondary element
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United States of America Patent
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Issued Date -
Apr 11, 2002
app pub date -
Jul 19, 2001
filing date -
Aug 9, 2000
priority date (Note) -
Abandoned
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Abstract
A Ni/metal hydride secondary element having a positive nickel hydroxide electrode, a negative electrode which contains a hydrogen storage alloy, and an alkaline electrolyte, wherein the positive electrode, which is provided with a three-dimensional metallic conductive structure, also contains a nickel hydroxide whose grains are coated with discrete particles composed of metallic copper. The mass of the copper coating is about 0.2 to about 15 % by weight, preferably about 5 to about 10% by weight, of the mass of nickel hydroxide. The nickel hydroxide material coating is produced by non-electrical chemical deposition in an alkaline environment.
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