| 摘要 |
A negative electrode active material is used, said negative electrode active material: forming a structure wherein a plurality of six-membered rings composed of silicon atoms extend; being manufactured by treating a layered polysilane represented by the composition formula (SiH)n with heat; and comprising a nano silicon material in which the molar quantity of halogen elements contained is not more than 11.5 if the molar quantity of silicon is regarded as being 100. Since the halogen content is reduced, this power storage device, which has a negative electrode in which the negative electrode active material is used, has an improved capacity retention. |
