| abstract |
The problem to be solved by the present invention is to provide a negative electrode active material having excellent charge-discharge characteristics (charge-discharge capacity, initial coulombic efficiency, and cycle characteristics). The above problems are solved by providing a negative electrode active material containing a silicon-based inorganic compound (a) containing silicon (excluding zero valence), oxygen, and carbon, and silicon (zero valence) (b), and the The negative electrode active material is characterized by: indicating the chemical bond state of silicon (excluding zero valence) in the silicon-based inorganic compound (a) (D unit [SiO 2 C 2 ], T unit [SiO 3 C], Q unit [SiO 2 ] 4 ]) The equivalent composition ratio [Q unit/(D unit+T unit+Q unit)] is in the range of 0.30 or more and 0.80 or less. |