Abstract: The object of the present invention is to provide a carbonaceous material for an anode of a nonaqueous electrolyte secondary battery which uses a plant-derived organic material as a raw material, has high purity so that alkali metals such as the potassium element are sufficiently removed by de-mineral, and has excellent cycle characteristics, and to provide a lithium ion secondary battery using the carbonaceous material. The carbonaceous material for an anode of a nonaqueous electrolyte secondary battery is a carbonaceous material obtained by carbonizing a plant-derived organic material, the atom ratio of hydrogen atoms and carbon atoms (H/C) according to elemental analysis being at most 0.1, the average particle size Dv50 being from 2 to 50 ?m, the average interlayer spacing of the 002 planes determined by X-ray diffraction being from 0.365 nm to 0.400 nm, the potassium element content being at most 0.5 mass %, the calcium element content being at most 0.
Type:
Application
Filed:
August 30, 2013
Publication date:
June 25, 2015
Applicant:
Kureha Battery Materials Japan Co., Lt.d
Inventors:
Mayu Komatsu, Yasushi Ebihara, Takashi Wakahoi, Yasuhiro Tada, Naohiro Sonobe, Mao Suzuki, Kayoko Okada, Akitoshi Hatamochi, Makoto Imaji, Yasufumi Ikeyama, Shota Kobayashi, Kenta Aoki