CARBON MATERIAL FOR SECONDARY CELL NEGATIVE ELECTRODE, ACTIVE SUBSTANCE FOR SECONDARY CELL NEGATIVE ELECTRODE, SECONDARY CELL NEGATIVE ELECTRODE, AND SECONDARY CELL

摘要

The present invention provides a carbon material for a secondary cell negative electrode in which increases in electrical resistance during charging and discharging are suppressed when used in low temperature environments and adequate cell characteristics can be ensured, an active substance for a secondary cell negative electrode that is created by including the carbon material for a secondary cell negative electrode, a secondary cell negative electrode that is configured by using the active substance for a secondary cell negative electrode, and a secondary cell in which the secondary cell negative electrode is used. This carbon material for a secondary cell negative electrode includes carbon particles in which the surface area per unit volume derived from the particle size distribution on a count basis is in the range of 10000 cm-1 to 16000 cm-1, and the active substance for a secondary cell negative electrode contains the carbon material for a secondary cell negative electrode. The secondary cell negative electrode (10) has an active substance layer (12) for a secondary cell negative electrode that includes the active substance for a secondary cell negative electrode, and a collector (14) for a negative electrode. The secondary cell (100) is provided with this secondary cell negative electrode (10), an electrolyte layer (40), and a secondary cell positive electrode (20).