CARBONACEOUS MATERIAL FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY NEGATIVE ELECTRODE, NEGATIVE ELECTRODE FOR NON-AQUEOUS ELECTROLYTE SECONDARY BATTERY, NON-AQUEOUS ELECTRODE SECONDARY BATTERY, AND VEHICLE

摘要

The present invention provides a carbonaceous material for a non-aqueous electrolyte secondary battery negative electrode, said material having a high discharge capacity per volume and excellent storage characteristics. In this carbonaceous material for a non-aqueous electrolyte secondary battery negative electrode, the true density (ρBt) determined by a butanol method is at least 1.55 g/cm3 but less than 1.75 g/cm3, and the discharge capacity of the negative electrode from 0.05-1.5 V in terms of a lithium reference electrode is at least 180 mAh/g. Furthermore, the slope (0.9/X (Vg/Ah)) of the discharge curve, which is calculated from the discharge capacity (X (Ah/g)) and potential difference (0.9 (V)) that correspond to 0.2-1.1 V in terms of the lithium reference electrode, is at most 0.75 (Vg/Ah), and the moisture absorption after 100 hours of storage in a 25 °C, 50% RH air environment is at most 1.5 wt%.