Preparation of VO.sub.2 (B) and a non-aqueous secondary cell usi

Details Preparation of VO.sub.2 (B) and a non-aqueous secondary cell usi Preparation of VO.sub.2 (B) and a non-aqueous secondary cell usi

1988-09-08

1990-10-23

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429218, 423592, H01M 448, C01B 1314

Patent

active

049651501

ABSTRACT:
VO.sub.2 (B) is prepared by heating NH.sub.4 VO.sub.3 to a decomposition temperature between about 200.degree. C. and about 537.degree. C. in an atmosphere comprising excess ammonia, whereby ammonia and water vapor are liberated, leaving a residue of VO.sub.2 (B), the liberated water vapor is removed and the VO.sub.2 (B) recovered. Non-aqueous secondary cells having a cathode including the resulting VO.sub.2 (B) resist loss of energy capacity upon cycling.

REFERENCES:
patent: 4228226 (1980-10-01), Christian et al.
patent: 4486400 (1984-12-01), Riley
patent: 4619822 (1986-10-01), Hammou et al.
patent: 4740433 (1988-04-01), Lu
Theobald et al., J. Solid State Chem. 17, pp. 431-438 (1976).
Murphy et al., J. Electrochem. SOc. 128, pp. 2053-2060 (Oct. 1981).
Kawashima et al., Chemistry Letters, pp. 1131-1136 (Chem. Soc. of Japan, 1975).
Selim et al., Thermochemica Acta 36, pp. 287-297 (1980).
Grymonprez et al., Acta Cryst. A33, pp. 834-837 (1977).
Wilhelmi et al., Acta Chemica Scandinavica 25, pp. 2675-2687 (1971).
Abraham et al., J. Electrochem. Soc. 128, pp. 2493-2500 (Dec. 1981).

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