| 摘要 |
PROBLEM TO BE SOLVED: To provide an electricity storage element in which deterioration in capacity after repeated charge/discharges at low temperatures can be suppressed.SOLUTION: An electricity storage element includes a negative electrode having an active material layer containing non-graphitizable carbon, as particle-like amorphous carbon. In the electricity storage element, the thickness of the active material layer in the negative electrode is 60 μm or more, the average particle size D50 of an active material is 5 μm or less, a positive electrode contains a particle-like active material, the thickness of an active material layer in the positive electrode is 60 μm or more, and the average particle size D50 of the active material of the positive electrode is 5 μm or less. In the electricity storage element, an electrolyte does not contain ethylene carbonate.SELECTED DRAWING: None |
