Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1997-05-08
1999-04-06
Kalafut, Stephen
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
429338, 429342, H01M 1040
Patent
active
058915885
ABSTRACT:
A lithium secondary battery including a negative electrode having has been inserted an active material at least one member selected from the group of metallic lithium, lithium alloys and materials which are capable of electrochemically occluding and releasing lithium ions; a positive electrode having an active material consisting of at least one compound which is capable of electrochemically occluding and releasing lithium ions; and an organic electrolyte. The solvent for the organic electrolyte is composed mainly of a mixture solvent prepared by mixing an organic solvent indicated by Formula I, 4-trifluoromethyl-1,3-dioxolane-2-one, and one or two selected from the group of organic solvents indicated by Formula II, 1-trifluoroethylmethyl carbonate, and an organic solvent indicated by Formula III, di-1-trifluorethyl carbonate, as mentioned below. As a result of using the solvent which contains the above-mentioned mixture solvent as a main component for the electrolyte, a lithium secondary battery with improved high-rate discharge characteristics, cycle characteristics and safety characteristics is obtained. ##STR1##
REFERENCES:
patent: 4550067 (1985-10-01), Horiba et al.
patent: 5633099 (1997-05-01), Yokoyama et al.
patent: 5659062 (1997-08-01), Yokoyama et al.
Patent Abstracts of Japan, JP 08037025 A, Japan Energy Corp., Feb. 6, 1996.
Sakai Shigeru
Yamamoto Masahiro
Furukawa Denchi Kabushiki Kaisha
Kalafut Stephen
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