NEGATIVE ELECTRODE MATERIAL FOR SECONDARY CELL, AND SECONDARY CELL

摘要

The present invention relates to a negative electrode material for a secondary cell, comprising graphite containing hexagonal crystal graphite and rhombohedral crystal graphite, and having a low-crystalline carbon coating on the surface thereof, and furthermore, in which there is an exothermic peak at 600°C or below and 690°C or above in DTA measurement, the full width at half maximum for the (101) peak is 0.2575° or less for the hexagonal crystal graphite in XRD measurement, or the absolute value of the difference between the lattice strain in the (101) plane of the hexagonal crystal graphite and the lattice strain in the (100) plane of the hexagonal crystal graphite is 7.1 × 10-4 or less in XRD measurement.