Alkaline cells having low toxicity rechargeable zinc electrodes

Details Alkaline cells having low toxicity rechargeable zinc electrodes Alkaline cells having low toxicity rechargeable zinc electrodes

2006-11-09

2009-06-09

Weiner, Laura S (Department: 1795)

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Electrode

C429S229000, C429S223000, C429S232000, C429S206000, C429S207000, C429S209000

Reissue Patent

active

RE040727

ABSTRACT:
A nickel zinc alkaline cell has a zinc oxide negative electrode supported on a conductive substrate, an alkaline electrolyte, and a positive electrode having nickel hydroxide paste supported on a conductive substrate. The negative zinc oxide electrode comprises 85% to 95% zinc oxide powder, 1% to 10% bismuth oxide, 1% to 2% of a binder, and 0.05% to 5% by weight of a fluoride salt chosen from the group consisting of: sodium, potassium, rubidium, caesium, lithium, and mixtures thereof. Typically, the fluoride salt is potassium fluoride, in the amount of 0.5% by weight of the zinc oxide.

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