Chemistry: electrical current producing apparatus – product – and – Process of cell operation
Patent
1989-08-04
1991-04-02
Kalafut, Stephen J.
Chemistry: electrical current producing apparatus, product, and
Process of cell operation
429206, 429218, H01M 424, H01M 446
Patent
active
050046543
ABSTRACT:
An aluminum battery comprises an aqueous alkaline electrolyte and an anode which is an alloy of aluminum 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/cm.sup.2 of anode surface for at least one hour, and introducing seed crystals into the electrolyte to aid precipitation of aluminum values from the electrolyte.
REFERENCES:
patent: 4078946 (1978-03-01), Anthony et al.
patent: 4084963 (1978-04-01), Anthony et al.
patent: 4146678 (1979-03-01), Anthony et al.
patent: 4751086 (1988-06-01), Jeffrey et al.
Hunter John A.
O'Callaghan Wilfred B.
Scamans Geoffrey M.
Wycliffe Paul A.
Alcan International Limited
Kalafut Stephen J.
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