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.

公开(公告)号：EP4266409A1

公开(公告)日：2023-10-25

申请号：EP21911449.3

申请日：2021-12-20

申请人： POSCO Holdings Inc. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY ,  POSCO Chemical Co., Ltd

发明人： LEE, Gang Ho ,  AN, Jung-Chul ,  PARK, Sei Min ,  YOON, Jong Hoon ,  JO, Hyun-Chul

IPC分类号： H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  C01B32/21

摘要： It is related to a manufacturing method of a negative electrode active material for lithium secondary battery, comprising: preparing an artificial graphite; mixing the artificial graphite and a coal tar to form a coating layer on the artificial graphite; and carbonizing the artificial graphite on which the coating layer is formed, wherein, the artificial graphite has a degree of sphericity of 0.6 to 1; and in the step of preparing an artificial graphite, the artificial graphite contains 20 wt% or more of artificial graphite derived from coal-based coke.

公开(公告)号：EP4266408A1

公开(公告)日：2023-10-25

申请号：EP21911447.7

申请日：2021-12-20

申请人： POSCO Holdings Inc. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY ,  POSCO Chemical Co., Ltd

发明人： LEE, Gang Ho ,  AN, Jung-Chul ,  PARK, Sei Min ,  YOON, Jong Hoon ,  JO, Hyun-Chul

IPC分类号： H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  H01M10/0525 ,  C01B32/21

摘要： It is related to a manufacturing method of negative electrode active material for lithium secondary battery, comprising: preparing an artificial graphite; forming a coating layer covering the artificial graphite by mixing the artificial graphite and a liquid coating material; and carbonizing the artificial graphite on which the coating layer is formed; wherein, the liquid coating material has a viscosity of 300 to 25000 mPa s at 35 °C; a negative electrode active material according to the method; and a lithium secondary battery including the same.

公开(公告)号：EP4250397A1

公开(公告)日：2023-09-27

申请号：EP21895109.3

申请日：2021-11-17

申请人： POSCO Holdings Inc. ,  RESEARCH INSTITUTE OF INDUSTRIAL SCIENCE & TECHNOLOGY ,  Posco Future M Co., Ltd

发明人： CHO, Moonkyu ,  LEE, Gang Ho ,  PARK, Sei Min ,  AN, Jung-Chul ,  YOU, Seung Jae ,  WOO, Jung Gyu ,  JO, Hyun-Chul ,  YOON, Jong Hoon

IPC分类号： H01M4/36 ,  H01M4/587 ,  H01M4/62 ,  C01B32/21 ,  C01B32/05 ,  H01M10/0525 ,  H01M4/02

摘要： The present disclosure relates to a manufacturing method of a negative active material for a battery, a negative active material manufactured therefrom, and a lithium secondary battery including the negative electrode, including:
the steps of coating a base material for a negative active material with a coating material; and heating the obtained coating product; wherein, the coating material is graphitizable carbon, the softening point is 50 °C or less, and the coating material is included so that the residual carbon amount is 1 to 5 parts by weight with respect to 100 parts by weight of the base material for the negative active material.

公开(公告)号：EP3901088A1

公开(公告)日：2021-10-27

申请号：EP19900603.2

申请日：2019-12-06

申请人： POSCO ,  Research Institute of Industrial Science & Technology

发明人： AN, Jung-Chul ,  PARK, Sei Min ,  LEE, Gang Ho ,  CHO, Moonkyu ,  KIM, Byoung Ju ,  YOON, Jong Hoon ,  JO, Hyun-Chul

IPC分类号： C01B32/205 ,  C01B32/21 ,  H01M4/587 ,  H01M10/0525

摘要： The present invention relates to a negative electrode active material of a lithium secondary battery, a manufacturing method thereof, and a lithium secondary battery using the same.
An embodiment of the present invention provides a negative electrode active material for a lithium secondary battery, including a graphite material including secondary particles, wherein the secondary particles are an assembly of a plurality of primary particles, the primary particles include green coke, and a ratio ((D90-D10)/D50) of a difference between a particle diameter D90 and a particle diameter D10 with respect to a particle diameter D50 of the secondary particles is 1.0 to 1.32.
An embodiment of the present invention provides a method for manufacturing a negative electrode active material for a lithium secondary battery, including: manufacturing primary particles by using a carbon raw material including green coke; manufacturing secondary particles by mixing the primary particles and a binder; carbonizing the secondary particles; and manufacturing a graphite material by graphitizing the carbonized secondary particles, wherein a particle diameter D50 of the primary particles is 5.5 to 10.0 µm.