Secondary battery and manufacturing method therefor

摘要

A secondary battery is comprised a positive electrode, an electrolyte and a negative electrode which intercalates lithium reversibly. The negative electrode uses a carbon compound having a crystal structure of graphite, and the carbon compound having carbon (C) being partially replaced by both boron (B) and nitrogen (N) and having a formula BC3N or the carbon compound having carbon (C) being partially replaced by boron (B) and having a formula BC3. In the battery, the positive electrode may be a metal chalcogen or metal oxide, such as FeS2, MoS2, TiS2, LiNiO2, LiMn2O3, LiFeO2, LiCoO2 and MnO2. The electrolyte may be a nonaqueous electrolyte or a solid electrolyte. The non-aqueous electrolyte uses an organic solvent and a lithium salt.