NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

The present invention provides a non-aqueous electrolyte secondary battery including a positive electrode, a negative electrode having a negative active material, and a non-aqueous electrolyte, characterized in that the negative active material contains composite particle (C), which has silicon-containing particle (A) and electronic conductive additive (B), the silicon-containing particle (A) has a content of carbon, and when measured at a temperature rising rate of 10±2° C./min by thermogravimetry, said composite particle (C) exhibits two stages of weight loss in the range of 30 to 1000° C.

主权项

1. A non-aqueous electrolyte secondary battery comprising:
a positive electrode; a negative electrode; and a non-aqueous electrolyte, wherein the negative electrode contains a negative active material, the negative active material contains a composite particle (C) and a carbon material (D), the composite particle (C) contains a silicon-containing particle (A) and an electron-conductive additive (B), the electron-conductive additive (B) contains a carbon material having an average interplanar spacing d(002) of 0.3354 nm or more and less than 0.34 nm, and the electron-conductive additive (B) covers the surface of the silicon-containing particle (A).