| abstract |
A power generation element and an outer can that accommodates the power generation element, the power generation element includes a positive electrode, a negative electrode, a separator interposed therebetween, and a nonaqueous electrolyte, and the negative electrode includes a negative electrode containing Si The negative electrode active material includes an amorphous Si phase, the binder includes polyacrylic acid, the non-aqueous electrolyte includes a non-aqueous solvent, and a mixture containing an active material and a binder. A lithium salt dissolved in a non-aqueous solvent, the non-aqueous solvent contains vinyl ethylene carbonate, and the outer can is welded with at least one lead terminal, and is contained in the negative electrode active material. A battery with a terminal, wherein the molar ratio of vinyl ethylene carbonate to the crystalline Si phase is 0.09 to 0.17. |