NONAQUEOUS ELECTROLYTIC SECONDARY BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a nonaqueous electrolytic secondary battery in which battery swelling and reduction in capacity-keeping rate are suppressed while the battery is charged and stored.SOLUTION: A nonaqueous electrolytic secondary battery of the invention comprises: a positive electrode having a positive electrode active material capable of absorbing and releasing lithium ions; a negative electrode having a negative electrode active material capable of absorbing and releasing lithium ions; a nonaqueous electrolyte; and a separator. The negative electrode active material includes at least two kinds of graphite which are coated with amorphous carbon differing from each other in coating amount. In the negative electrode active material, the coating amounts of the amorphous carbon coating the graphite are preferably 0.5 to less than 1 mass%, and 1 mass% or larger.