| 摘要 |
PROBLEM TO BE SOLVED: To provide a negative electrode active material whose electron conductivity is improved.SOLUTION: As a negative electrode of a secondary battery, a copper-containing layered polysilane which is composed of layered polysilane which forms a structure in which a plurality of six-membered rings composed of silicon atoms are arranged in a row and being represented by a compositional formula: (SiH)as a basic skeleton, and copper which exists between layers of the layered polysilane and contains 0.01 to 50 mass%. Electron conductivity is improved by containing copper. Due to its reason, in a power storage device using the negative electrode active material in a negative electrode, rate characteristics are improved and charge/discharge capacity is increased. |
