Electrochemical cell

Details Electrochemical cell Electrochemical cell

H - Electricity

01

M

319/101

H01M 4/52 (2006.01) H01M 2/16 (2006.01) H01M 4/02 (2006.01) H01M 10/02 (2006.01) H01M 10/39 (2006.01)

Patent

CA 1290806

ABSTRACT The invention provides a method of making a cathode suitable for an electrochemical cell of the type having a molten sodium anode, a beta"-alumina separator, a cathode which comprises one or more transition metals selected from the group comprising Fe, Ni, Co, Cr and Mn. The method comprises heating a particulate starting material comprising at least one member of said group of transition metals in an oxidizing atmosphere to cause its particles to become at least partially oxidized, and to adhere together to form a unitary porous matrix. This matrix is then heated in a reducing atmosphere at least partially to reduce the oxide formed during the formation of the matrix, and the reduced matrix is then impregnated with a sodium aluminium chloride molten salt electrolyte. Sodium chloride in dispersed form is incorporated into the matrix, preferably by mixing sodium chloride in particulate form with the particulate transition metal starting material, before the heating in an oxidizing atmosphere to form the matrix.

538666

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