公开(公告)号：EP3670475A1

公开(公告)日：2020-06-24

申请号：EP18846532.2

申请日：2018-08-01

申请人： POSCO Chemical Co., Ltd ,  Research Institute of Industrial Science & Technology ,  Posco Chemtech

发明人： AN, Jung-Chul ,  PARK, Sei Min ,  LEE, Jae Eun ,  KIM, Byoung Ju ,  YOU, Seung Jae ,  KIM, Hyoung Geun ,  LEE, Sang Eun ,  LEE, Chan Woo ,  JO, Hyun-Chul ,  KIM, Myung Ki

IPC分类号： C04B35/52 ,  C04B35/634 ,  C04B35/622 ,  C04B35/626 ,  H01M4/587 ,  H01M10/0525

摘要： Presented is a method for producing a negative electrode active material which has a high discharge capacity, high charge-discharge efficiency, and excellent high-output characteristics, and which experiences only a small volume change during charging/discharging. A method for producing a negative electrode active material for a lithium secondary battery according to an embodiment of the present invention includes: a step for producing primary particles by pulverizing a carbon raw material containing 4 to 10 wt% of volatile matters; a step for producing secondary particles by mixing the primary particles with a binder; and a step for producing a graphite material by graphitizing the secondary particles.