LITHIUM ION SECONDARY BATTERY AND METHOD FOR MANUFACTURING SAME

摘要

Provided is a lithium ion secondary battery which has improved manganese dissolution inhibition performance during the charging and discharging of the lithium ion secondary battery. In this lithium ion secondary battery, a positive electrode (64) is provided with a positive electrode collector (62) and a positive electrode mixture layer (66) that is formed on the positive electrode collector and contains at least a positive electrode active material (70). The positive electrode active material is mainly composed of a manganese-containing lithium complex oxide (72) that contains lithium and at least manganese as a transition metal element, and the positive electrode active material (70) with a coating film is provided with a coating film (74) that is an amorphous structure which is formed on at least a part of the surface of the manganese-containing lithium complex oxide and contains at least iron (Fe) and fluorine (F).