| abstract |
Characteristics of a battery are improved. The nonaqueous electrolyte secondary battery of the present application includes a positive electrode, a negative electrode, a separator disposed between the positive electrode and the negative electrode, and an electrolyte solution. The positive electrode has a positive electrode active material and a binder for positive electrode. Then, the positive electrode active material has at least an alkali metal element as a constituent element, and the binder for positive electrode has cellulose and a solvent, and carbon dioxide gas is dissolved in the solvent. Further, a part or all of the surface of the positive electrode active material is coated with the cellulose, and a carbonate compound of the alkali metal element is coated on a part or all of the surface of the cellulose. According to such a configuration, it is possible to improve the characteristics of the battery, such as suppression of decrease in carbonic acid concentration due to carbonic acid vaporization, suppression of decrease in battery characteristics, suppression of oxidative decomposition of cellulose fibers, suppression of swelling of active material layer, and active decomposition of alkali metal carbonate. |