Aluminium batteries

Details Aluminium batteries Aluminium batteries

H - Electricity

01

M

319/36, 319/83

H01M 4/46 (2006.01) C22C 21/00 (2006.01) H01M 6/04 (2006.01) H01M 12/06 (2006.01)

Patent

CA 1306002

ABSTRACT An aluminium battery comprises an aqueous alkaline electrolyte and an anode which is an alloy of aluminium containing magnesium and/or calcium. Tin is present in the electrolyte (as stannate at a concentration of 0.001 to 0.01 M) and/or in the anode (at a concentration of at least 0.005%). The batteries operate at high coulombic efficiency at both high and low current densities. Preferred conditions of operation comprise drawing current at an average current density of 5 to 400 mA/cm2 of anode surface for at least one hour, and introducing seed crystals into the electrolyte to aid precipitation of aluminium values from the electrolyte.

607748

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