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

01

M

H01M 4/42 (2006.01) H01M 4/24 (2006.01) H01M 4/62 (2006.01)

Patent

CA 2325308

A zinc electrode composition for use in low toxicity, high energy density cells having an alkaline electrolyte. The zinc electrode comprises zinc oxide, a binder, and from between 0.1 up to 10% of a fluoride of an element chosen from the group consisting of beryllium, magnesium, calcium, strontium, barium, titanium, aluminum, 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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