| 摘要 |
PROBLEM TO BE SOLVED: To provide a power storage device superior in high-temperature high-rate cycle durability.SOLUTION: A power storage device comprises a laminate 400 including a positive electrode 410, a negative electrode 420, a separator 430 disposed between the positive electrode 410 and the negative electrode 420, a nonaqueous electrolyte, and an inorganic coating layer 440 disposed between the positive electrode 410 and the separator 430. In the power storage device, the positive electrode 410 includes, as a positive electrode active material, a compound expressed by LiNiCoMnO(where a, b, c and d satisfy: 0≤a≤1.2; 0≤b≤1; 0.1≤c≤0.4; 0≤d≤0.5; and b+c+d=1). The negative electrode 420 includes, as a negative electrode active material, hardly graphitizable carbon of which the D50 particle diameter is 1.0-6.0 μm. |
