| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode for a secondary battery offering a high discharge capacity and excellent cycle characteristics, and a secondary battery suitable for an electric vehicle and a smart grid.SOLUTION: A negative electrode for a secondary battery comprises an active material layer composed of a negative electrode active material bound together with a binder. The binder is composed of a polyimide resin having a repeating unit represented by the formula (1). The negative electrode active material is composed of a carbon material made from at least one of petroleum heavy oil and coal heavy oil, the average particle size is in the range of 5 to 50 μm, the distance dbetween the crystal faces obtained by X-ray diffraction is in the range of 0.3354 to 0.3500 nm, and the BET specific surface area is equal to or smaller than 10 m/g. A secondary battery comprises the negative electrode for a secondary battery. |
