Chemistry: electrical current producing apparatus – product – and – Current producing cell – elements – subcombinations and... – Include electrolyte chemically specified and method
Patent
1995-07-07
1996-12-03
Bell, Bruce F.
Chemistry: electrical current producing apparatus, product, and
Current producing cell, elements, subcombinations and...
Include electrolyte chemically specified and method
429197, 429199, 429203, 429218, 252 622, 252500, H01M 614
Patent
active
055806848
ABSTRACT:
A non-aqueous electrolytic solutions which has self-distinguishing property, low reactivity to metal lithium and high withstand voltage is provided. The non-aqueous electrolytic solutions of the first invention comprise, as electrolyte, lithium salt preferably LiPF.sub.6 and, as solvent, phosphoric acid esters of the following general formula [1]; ##STR1## wherein R.sup.1, R.sup.2 and R.sup.3, which may be the same or different, represent an alkyl group or an alkyl group substituted by one or more halogen atoms and at least one of R.sup.1, R.sup.2, and R.sup.3 represents an alkyl group substituted by one or more halogen atoms. The non-aqueous electrolytic solutions of the second invention comprise, as solvents for electrolyte, trimethyl phosphate, one or more linear carbonates represented by the following general formula [3]; ##STR2## (wherein R.sup.6 represents methyl or ethyl group and R.sup.7 represents a linear or branched alkyl group having 1 to 3 carbon atoms) and one or more cyclic carbonates and, as electrolyte, LiPF.sub.6 ; wherein content of the trymetyl phosphate is 1 to 10% by volume of the solvents for electrolyte. The non-aqueous electrolytic solution is suitable for a cell using carbon material capable of being doped and dedoped with lithium ions as a negative electrode active material and complexed oxide of lithium and a transition metal as a positive electrode active material.
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Fujita Shigeru
Hiwara Akio
Naruse Yoshiaki
Omaru Atsuo
Toriida Masahiro
Bell Bruce F.
Mitsui Petrochemical Industries Ltd.
Sony Corporation
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