Alkali metal anode/chalcogenide cathode reversible batteries hav

Details Alkali metal anode/chalcogenide cathode reversible batteries hav Alkali metal anode/chalcogenide cathode reversible batteries hav

1977-09-26

1978-08-01

LeFevour, Charles F.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429198, 429218, H01M 614

Patent

active

041044517

ABSTRACT:
Reversible alkali metal anode/metal chalcogenide cathode cells, e.g. lithium batteries, are described having electrolyte compositions which consist essentially of (a) organic solvents selected from the group consisting of inertly substituted and unsubstituted ethers, esters, sulfones, organic sulfites, organic sulfates, organic nitrites and organic nitro compounds; and (b) electrolytically active alkali metal salts including polyaryl metallic alkali metal salts having the formula ZMR.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, the Rs are certain aryl radicals, and n is a numerical value equal to one plus the valence of the metal M. Rechargeable, high energy density electrochemical cells containing an anode having an alkali metal as its active material, a cathode having as its active material a transition metal chalcogenide, e.g. TiS.sub.2, and an electrolyte composition of the above-described type, are preferred.

REFERENCES:
patent: 3764385 (1973-10-01), Langer et al.
patent: 4002492 (1977-01-01), Rao
patent: 4009052 (1977-02-01), Whittingham

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