ELECTROLYTE AND LITHIUM ION SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To suppress deterioration due to redox decomposition of an electrolyte in a lithium ion secondary battery which uses a positive electrode active material composed of a lithium manganese based oxide containing a lithium (Li) element and a tetravalent manganese (Mn) element and having a crystal structure belonging to a layered rock-salt structure.

SOLUTION: It is considered that a coating is formed on a positive electrode surface due to oxidation of an additive agent before oxidation of an organic solvent during an activation treatment and a high temperature storage by adding furan in the electrolyte, and then capacity recovery rate is increased.

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