| abstract |
The present invention is a nonaqueous electrolyte secondary battery comprising a negative electrode and a nonaqueous electrolyte containing a positive electrode and a negative electrode active material, the negative electrode active material is a composite particle (C) having a particle (A) containing silicon and a conductivity-imparting agent (B) And a carbon material (D), wherein the weight of the conductivity giving agent (B) is 0.5% by weight or more and 60% by weight or less with respect to the weight of the composite particles (C).n n n Since the negative electrode active material contains silicon having a large discharge capacity, a nonaqueous electrolyte secondary battery having a large discharge capacity can be obtained. In addition, since the negative electrode active material contains the conductivity imparting agent (B) and the carbon material (D), the contact conductivity between the particles (A) containing silicon or the negative electrode active material is improved, thereby providing a nonaqueous electrolyte secondary battery having good cycle characteristics. You can get it.n n n n Non-aqueous electrolyte secondary battery, negative electrode active material, composite particles, conductivity giving agent, silicon oxide, cycle characteristics, discharge capacity |