MANUFACTURING METHOD OF LITHIUM ION SECONDARY BATTERY AND LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To enable to obtain charge and discharge cycle characteristics equivalent to or better than a case in which electrolyte solution using ethylene carbonate is utilized, with the use of electrolyte solution mainly composed of propylene carbonate as well as to improve low-temperature characteristics and aim at cost reduction.

SOLUTION: An anode of a lithium ion secondary battery is made by coating on an anode collector aqueous slurry formed by kneading graphite powder with a surface hydrophilicized as an anode active material, a water-soluble thickener and a water-dispersed binder. Nonaqueous electrolyte solution contains 5 to 50 vol.% of propylene carbonate and 95 to 5 vol.% of mixture solution mixing dimethyl carbonate and an organic matter with an unsaturated bond in a molecule, capable of reduction polymerization and capable of solvating with lithium.

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