| abstract |
The lithium ion secondary battery of the present invention has a negative electrode, a positive electrode, and a non-aqueous electrolyte solution, the non-aqueous electrolyte solution contains a lithium salt and an aprotic solvent, the negative electrode contains composite particles, and the composite particles contain a negative electrode active material and Tungsten trioxide, the negative electrode active material contains graphite, and the tungsten trioxide is arranged on the surface of the negative electrode active material. |