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1. (WO2018087928) NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY

Pub. No.:    WO/2018/087928    International Application No.:    PCT/JP2016/083714
Publication Date: Fri May 18 01:59:59 CEST 2018 International Filing Date: Tue Nov 15 00:59:59 CET 2016
IPC: H01M 4/587
Applicants: HITACHI CHEMICAL COMPANY, LTD.
日立化成株式会社
Inventors: Nakamura, Nobushige
中村 喜重
OKABE, Keiji
岡部 圭児
HONBOU, Hidetoshi
本棒 英利
Title: NEGATIVE ELECTRODE MATERIAL FOR LITHIUM ION SECONDARY BATTERY, NEGATIVE ELECTRODE FOR LITHIUM ION SECONDARY BATTERY, AND LITHIUM ION SECONDARY BATTERY
Abstract:
In this negative electrode material for a lithium ion secondary battery, the mean interplanar spacing d002 determined by the X-ray diffraction method is 0.335 nm to 0.339 nm and the specific surface area determined by nitrogen adsorption measurement at 77 K is 0.5 m2/g to 6.0 m2/g, the negative electrode material containing a carbon material satisfying (1) and (2). (1) In a count-based particle size distribution, the particle diameter at which the differential relative particle amount q0 takes the most frequent value is 11.601 μm or smaller. (2) In the count-based particle size distribution, the ratio (q0A/q0B) between the differential relative particle amount q0A at a particle diameter of 11.601 μm, and the differential relative particle amount q0B at a particle diameter of 7.806 μm is 1.20 to 3.00.