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

摘要

The purpose of this invention is to provide, among other things, a carbonaceous material for a negative electrode of a nonaqueous-electrolyte secondary battery, said carbonaceous material having a high volumetric energy density and excellent cycle characteristics. This negative-electrode material for a nonaqueous-electrolyte secondary battery comprises, as an active material, a carbon-material mixture that contains a plurality of non-graphitic carbon materials. The true density (ρBt) of said carbon-material mixture, as determined using a butanol method, is between 1.60 and 2.05 g/cm3, inclusive; the atomic ratio of hydrogen to carbon (H/C) in the carbon-material mixture, as per elemental analysis, is no more than 0.10; and the discharge capacity of the carbon-material mixture at 0 to 0.1 V relative to a lithium reference electrode is between 80 and 230 mAh/g, inclusive.