A non-aqueous electrolyte secondary battery negative electrode carbonaceous material and method

Object of the present invention is to provide a plant-derived organic matter as a raw material can be achieved and potassium, alkali metal alkaline earth metal calcium deashing sufficiently high purity and excellent in discharge capacity and efficiency of the non-aqueous electrolyte secondary battery the carbonaceous negative electrode material capable of efficient, novel method for mass production of the carbonaceous material, and the lithium ion secondary battery using the carbonaceous material. The above-described object can be a secondary battery negative electrode carbon material is achieved by a non-aqueous electrolyte, the nonaqueous electrolyte secondary battery negative electrode carbon material by carbonizing the organic substance derived from a plant is obtained, which is obtained by elemental analysis atoms of atomic hydrogen atoms to carbon ratio (H / C) is less than or equal to 0.1, an average particle diameter Dv50 of 2 ~ 50μm, by calculating the average face powder X-ray diffraction method 002 spacing is at 0.365nm ~ 0.400nm, potassium content is equal to less than 0.5wt%, the content of calcium is less 0.02wt%.