| abstract |
A battery with terminals, which is equipped with a power generating element and an outer packaging tank for accommodating the power generating element, the power generating element includes: a positive electrode, a negative electrode, a separator between the positive electrode and the negative electrode, and a non-aqueous electrolyte, and the negative electrode contains a negative electrode active material containing Si and A mixture of binders, the negative electrode active material contains amorphous Si phase, the binder contains polyacrylic acid, the non-aqueous electrolyte contains a non-aqueous solvent and lithium salt dissolved in the non-aqueous solvent, and the non-aqueous solvent contains ethylene carbonate , at least one lead terminal is welded on the outer packaging tank, and the molar ratio of ethylene carbonate to the amorphous Si phase contained in the negative electrode active material is 0.09˜0.17. |