LITHIUM-ION SECONDARY BATTERY AND ITS MANUFACTURING METHOD

摘要

PROBLEM TO BE SOLVED: To provide a lithium-ion secondary battery having a large capacity and capable of maintaining the capacity for a long period of time, and its manufacturing method.

SOLUTION: An electrode assembly is prepared with a positive electrode having a carbon material of 30 to 500 m2/g as a specific surface area and of 0.35 to 0.38 nm interlayer distance in a d002 plane, a negative electrode, and an electrolyte having at least a lithium compound as a solute. Anion generated by the ionization of the lithium compound is trapped in the interlayer of the carbon material to increase the specific surface area of the carbon material.

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