Patent ID: 9570744
Date: 2017-02-14
CPC Classifications: H01M,Y02E

Claim:
1. A lithium ion secondary battery comprising: a positive electrode: a negative electrode; and an electrolyte solution, wherein the positive electrode uses a compound represented by a formula (1) as a positive electrode active material, the positive electrode has an electrode density of 3.75 to 4.10 g/cm the positive electrode has a positive electrode active material amount of 20 to 30 mg/cm the positive electrode has a pore volume of 0.005 to 0.02 cm the positive electrode has a BET specific surface area of 1.3 to 3.5 m where 0.95≦a≦1.05, 0.5≦x≦0.9, 0.05≦y≦0.2, and 0.7≦x+y≦1.0.