| 摘要 |
PROBLEM TO BE SOLVED: To provide an electrode for a battery with high adhesion of a binder with a current collector and capable of increasing the thickness of an electrode material by limiting each modulus of elasticity in bending, compression, and tension of binder resin. SOLUTION: A binder containing resin having a modulus of elasticity in bending of 1000MPa or less and/or modulus in compression of 500MPa or less and/or modulus of elasticity in tension of 500MPa or less is used in the binder of an electrode for a battery. The binder containing the resin increases the flexibility of the electrode and coating capability, and is especially effective when the electrode is spirally wound. Since the flexibility is increased, the thickness of the electrode can be increased, the filling amount of an active material is increased to increase the capacity. The content of the resin in the binder is 5% or more by weight, and the resin is preferable to be fluorine resin, especially polyhexafluoropropylene and/or a copolymer of vinylidene fluoride and hexafluoropropylene. |
