Gerald Newman

US Patent:

40753972, Feb 21, 1978

Filed:

Mar 1, 1977

Appl. No.:

5/773284

Inventors:

Robert W. Francis - Linden NJ
Gerald H. Newman - Westfield NJ

Assignee:

Exxon Research & Engineering Co. - Linden NJ

International Classification:

H01M 1044

US Classification:

429 50

Abstract:

A novel electrochemical cell is disclosed utilizing: (a) an anode which contains as the anode-active material an alkali metal, (b) a cathode which contains as the cathode-active material a chalcogenide of the empirical formula M'A. sub. p wherein M' is one or more metals selected from the group consisting of titanium, zirconium, hafnium, niobium, tantalum and vanadium, A is one or more chalcogens selected from the group consisting of oxygen, sulfur, selenium and tellurium, and p is a numerical value between about 1. 8 and about 3. 2; and (c) a solid electrolyte consisting essentially of one or more solvated metal-alkali metal-halogen compounds of the formula ZMX. sub. n wherein Z is an alkali metal, M is a metal selected from the group consisting of Zn, Cd, B, Al, Ga, In, Tl, Sn (stannous), P and As, and wherein X is one or more halogens selected from the group consisting of chlorine, fluorine, bromine and iodine and n is a numerical value equal to one plus the valence of the metal M. Preferred are the cells wherein the anode is lithium, the cathode contains as its cathode-active material TiS. sub. 2, and the electrolyte consists essentially of a solid solvated metal-lithium-halogen salt.