Non-aqueous liquid electrolyte secondary cell

Details Non-aqueous liquid electrolyte secondary cell Non-aqueous liquid electrolyte secondary cell

1994-05-13

1995-06-27

Kalafut, Stephen

Chemistry: electrical current producing apparatus, product, and

Current producing cell, elements, subcombinations and...

Include electrolyte chemically specified and method

429197, H01N 1040

Patent

active

054278740

ABSTRACT:
A non-aqueous liquid electrolyte secondary cell having a negative electrode formed of a carbon material capable of being doped with and releasing lithium, a positive electrode, and a non-aqueous liquid electrolyte having an electrolyte dissolved in a non-aqueous solvent, is disclosed. This cell contains pyrocarbonate having the formula (ROCO).sub.2 O, wherein R is an alkyl group selected from the group consisting of CH.sub.3, C.sub.2 H.sub.5 and C.sub.3 H.sub.7. If the pyrocarbonate is mixed with other non-aqueous solvent(s), the proportion of the pyrocarbonate in the non-aqueous solvent, is not less than 25 vol%. The non-aqueous liquid electrolyte secondary cell is capable of withstanding charging/discharging cycles at high charging voltages, while exhibiting satisfactory charging/discharging cyclic performance under high temperature environment and superior discharging performance under low-temperature environment and heavy loads.

REFERENCES:
patent: 4565648 (1986-01-01), Kopp et al.
patent: 5219683 (1993-06-01), Webber
patent: 5296319 (1994-03-01), Bito et al.
Journal of the Electrochemical Society, vol. 127, No. 9, 1 Sep., 1980.
Patent Abstracts of Japan, vol. 8, No. 162 (C-235) 26 Jul. 1984.

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