NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolyte secondary battery excellent in aging capacity efficiency.SOLUTION: A nonaqueous electrolyte secondary battery includes: a negative electrode containing amorphous carbon coated graphite with a charge/discharge efficiency of 93.5% or more, as a negative electrode active material; and a positive electrode containing a positive electrode active material comprising a mixture having a mass ratio (LMO:LNO) between lithium-manganese oxide (LMO) and lithium-nickel oxide (LNO) of 20:80-90:10.SELECTED DRAWING: Figure 3