Negative electrode formulation for a low toxicity zinc...

Details Negative electrode formulation for a low toxicity zinc... Negative electrode formulation for a low toxicity zinc...

H - Electricity

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H01M 4/42 (2006.01) H01M 4/24 (2006.01) H01M 4/62 (2006.01) H01M 10/26 (2006.01) H01M 10/24 (2006.01) H01M 10/30 (2006.01) H01M 10/42 (2006.01)

Patent

CA 2325791

A zinc electrode composition is provided for use in low toxicity, high energy density cells having alkaline electrolytes. The zinc electrode comprises zinc oxide, a binder, and from 0.1 % up to 10% of a fluoride of an element chosen from the group consisting of silver, gallium, indium, tin, tellurium, lead, bismuth, and combinations thereof. The invention also provides an electrochemical cell having an electrode as noted above. The inventive cell further comprises an electrolyte which contains a mixture of sodium, potassium, and lithium hydroxides, together with boric acid. The excess alkali hydroxide is present in the range of 2.7 to 5M, and the concentration of boric acid is between 0.6 and 1.3 moles per litre.

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