Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1995-03-07
1996-11-26
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
429194, 429218, 429224, H01M 436, H01M 450, H01M 1040
Patent
active
055783953
ABSTRACT:
A lithium secondary battery comprises a negative electrode having lithium as an active material, a positive electrode comprising a boron-containing lithium-manganese composite oxide as an active material and a nonaqueous electrolyte comprising a solute and a solvent, the boron-containing lithium-manganese composite oxide having an atomic ratio between B and Mn (B/Mn) of 0.01 to 0.20 and an average valence of manganese before charge-discharge of at least 3.80, and the solvent being a mixed solvent containing 5 to 50% by volume of a butylene carbonate. This battery is highly reliable, since the positive electrode active material minimally decomposes and hence the internal resistance minimally increases, even when the battery is continuously charged at a high voltage by mistake.
REFERENCES:
patent: 4465747 (1984-08-01), Evans
Fujimoto Minoru
Nishiguchi Nobuhiro
Nishio Koji
Saito Toshihiko
Shoji Yoshihiro
Kalafut Stephen
Lilley, Jr. Richard H.
Sanyo Electric Co,. Ltd.
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