Patent ID: 7897283

Claim:
A graphite composite particle for a nonaqueous secondary battery, which satisfies the following requirements (1) and (2): (1) D L /D S is more than 1 and 2 or less, wherein D L μm means a volume-based median size which is measured by suspending 10 mg of the particle in 10 mL of 0.2 mass % polyoxyethylene sorbitan monolaurate aqueous solution, introducing the suspension into a commercially available laser diffraction/scattering-type particle size distribution measuring apparatus, and irradiating the suspension with an ultrasonic wave of 28 kHz at a power of 60 W for 1 minute, and D S μm means an average circle-equivalent particle size which is determined by selecting 100 particles each having a contour not overlapped with a contour of another particle at an observation using a scanning electron microscope, and determining an average value of the circle-equivalent particle size of the 100 particles determined from a measured area S of individual particles according to 2×(S/3.14) 0.5 ; and (2) a Raman R value is 0.04 or more and 0.14 or less, wherein the Raman R value means an intensity ratio I B /I A between an intensity I A of a maximum peak of 1580 cm −1 around and an intensity I B of a maximum peak of 1360 cm −1 around in a Raman spectrum.