NEGATIVE-ELECTRODE MATERIAL FOR NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, NEGATIVE-ELECTRODE MIXTURE FOR NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, NEGATIVE ELECTRODE FOR NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, NONAQUEOUS-ELECTROLYTE SECONDARY BATTERY, AND VEHICLE

摘要

A negative electrode material for a non-aqueous electrolyte secondary battery and the like with high discharge capacity relative to volume and excellent cycle characteristics are provided. The negative electrode material for a non-aqueous electrolyte secondary battery of the present invention comprises, as an active material, a carbon material mixture including a non-graphitic carbon material and a graphitic material. In this carbon material mixture, the non-graphitic carbon material has an atom ratio (H/C) of hydrogen atoms to carbon atoms determined by elemental analysis of 0.10 or less, and an average particle size (D v50 ) of from 1 to 8 µm; and the graphitic material has a true density (Á Bt ) determined by a pycnometer method using butanol of 2.15 g/cm 3 or greater. The true density (Á Bt ) of the non-graphitic carbon material is preferably 1.52 g/cm 3 or greater and less than 2.15 g/cm 3 .