IGH VOLTAGE, HIGH COULOMB EFFICIENCY AND GOOD CYCLIABILITY LITHIUM ION SECONDARY BATTERY

摘要

A lithium ion secondary battery is provided to ensure high efficiency and high-capacity by using a negative electrode having coulomb efficiency, high specific capacity and excellent cycle lifetime property. A lithium ion secondary battery comprises a negative electrode with initial coulombic efficiency of 90% or greater, a positive electrode with an LiCoO2 positive electrode active material, and an ion conductor. The negative electrode comprises a negative electrode active material including a non-carbonaceous, a binder, and a conductive material.