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AssigneesMatsushita Electric Industrial Co., Ltd., Mitsubishi Petrochemical Co., Ltd.
InventorsHiromi Okuno, Hizuru Koshina, Takayuki Kawahara, Katsuaki Hasegawa
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A nonaqueous electrolyte secondary battery having excellent cycle life characteristic, stability in storage at high temperatures and low-temperature characteristic, which is provided with an anode including a carbon material capable of doping and undoping lithium ion, a nonaqueous electrolyte and a cathode including a lithium-containing oxide, the solvent for the nonaqueous electrolyte being a mixed solvent including an aliphatic carboxylate, a cyclic carbonate and a chain carbonate, with the aliphatic carboxylate being represented by the formula RCOOR' where R represents an ethyl group and R' represents an alkyl group of 1-3 carbon atoms and the cyclic carbonate being one of ethylene carbonate and propylene carbonate.
A nonaqueous electrolyte secondary battery which is provided with an anode comprising a carbon material capable of doping and undoping lithium ions, a nonaqueous electrolyte comprising a solute and a solvent, and a cathode comprising a lithium-containing oxide, said solvent being a mixed solvent comprising an aliphatic carboxylate represented by the formula RCOOR' wherein R represents an ethyl group and R' represents an alkyl group of 1-3 carbon atoms, a cyclic carbonate and a chain carbonate, said cyclic carbonate being one of ethylene carbonate and propylene carbonate.
A nonaqueous electrolyte secondary battery which is provided with an anode comprising a carbon material capable of doping and undoping lithium ions, a nonaqueous electrolyte comprising a solute and a solvent, and a cathode comprising a lithium-containing oxide, said solvent being a mixed solvent comprising an aliphatic carboxylate represented by the formula RCOOR' wherein R represents an ethyl group and R' represents an alkyl group of 1-3 carbon atoms, a cyclic carbonate and a chain carbonate, said chain carbonate being selected from the group consisting of diethyl carbonate, dimethyl carbonate and ethyl methyl carbonate.
Dependencies are inferred from the claim text.