| abstract |
Provided are a high-speed charge / discharge electrode and a battery that can prevent lithium deposition even when charged / discharged at a high current at a high speed and have excellent energy density. A negative electrode for a secondary battery in which the same type of metal ions are exchanged between a positive electrode and a negative electrode, The negative electrode active material has a film thickness of 30 μm or less, 1 μm or more, and contains, as the negative electrode material, one or more of an oxide or salt of a metal that forms an alloy with the metal obtained by reducing the metal ion, or boron-added carbon. A negative electrode. [Selection diagram] None |