| abstract |
A negative electrode material for a non-aqueous electrolyte secondary battery, which maintains the features of non-oriented graphite particles and is excellent in discharge capacity, charge / discharge efficiency, low-temperature charge characteristics, cycle characteristics, and high-density electrode, and negative electrode A non-aqueous electrolyte secondary battery is provided. SOLUTION: A plurality of flat graphite fine particles are aggregated or bonded non-parallel to each other, have an aggregate structure, an average particle diameter (50% D) of 10 μm to 50 μm, an aspect ratio of 5 or less, true Argon laser having a specific gravity of 2.22 or more, a bulk density of 800 kg / m 3 or more and 1000 kg / m 3 or less, a specific surface area measured by the BET method of 2.0 m 2 / g or more and 4.0 m 2 / g or less, and a wavelength of 5145 mm. In the Raman spectrum analysis using light, the R value of the formula (1) is less than 0.2, and has an exothermic peak at 550 ° C. or more and 620 ° C. or less by differential thermal analysis in an air stream, and the temperature rises to 5 ° C. The peak area at / min is 100 μV · s / mg or more and 500 μV · s / mg or less. [Selection figure] None |