Graphite negative electrode material for non-aqueous secondary batteries, negative electrode for non-aqueous secondary batteries and non-aqueous secondary batteries

摘要

PROBLEM TO BE SOLVED: To provide a graphite-based negative electrode material having excellent quick charging characteristics. Further, the present invention provides a negative electrode for a non-aqueous secondary battery and a non-aqueous secondary battery obtained by using this graphite-based negative electrode material. SOLUTION: In the electron spin resonance method measured by using microwaves in the X band region, it has an absorption spectrum derived from a carbon radical appearing near g = 2.0, and a resonance absorption curve at a temperature of 4.8 K. A graphite-based negative electrode material for a non-aqueous secondary battery having a half-value width ΔH1 / 2 of 2.7 (mT) or more and a Raman R value of 0.21 or more represented by the following formula 1. Equation 1: [Raman R value] = [Intensity ID of peak PD near 1360 cm-1 in Raman spectrum analysis] / [Intensity IG of peak PG near 1580 cm-1 in Raman spectrum analysis] [Selection diagram] None