US 11,837,376 B2
Composite conductive material having excellent dispersibility, slurry for forming lithium secondary battery electrode using the same, and lithium secondary battery
Tea Gon Kim, Daejeon (KR); Je Young Kim, Daejeon (KR); Hak Yoon Kim, Seoul (KR); Ki Won Sung, Daejeon (KR); Ye Lin Kim, Daejeon (KR); Joo Yul Baek, Daejeon (KR); Jung Keun Yoo, Daejeon (KR); Jun Muk Lim, Daejeon (KR); and Seul Ki Kim, Gyeonggi-do (KR)
Assigned to LG Energy Solution, Ltd.
Filed by LG Chem, Ltd., Seoul (KR)
Filed on Dec. 9, 2020, as Appl. No. 17/116,558.
Application 17/116,558 is a division of application No. 16/332,611, granted, now 10,902,968, previously published as PCT/KR2018/006517, filed on Jun. 8, 2018.
Claims priority of application No. 10-2017-0071506 (KR), filed on Jun. 8, 2017.
Prior Publication US 2021/0104338 A1, Apr. 8, 2021
Int. Cl. C01B 32/15 (2017.01); B01J 23/75 (2006.01); B01J 37/02 (2006.01); B01J 37/08 (2006.01); H01M 4/583 (2010.01); B82Y 40/00 (2011.01); H01B 1/04 (2006.01); H01M 4/13 (2010.01); H01M 4/36 (2006.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); B82Y 30/00 (2011.01)
CPC H01B 1/04 (2013.01) [B01J 23/75 (2013.01); B01J 37/0201 (2013.01); B01J 37/08 (2013.01); B82Y 30/00 (2013.01); B82Y 40/00 (2013.01); C01B 32/15 (2017.08); H01M 4/13 (2013.01); H01M 4/364 (2013.01); H01M 4/583 (2013.01); H01M 4/62 (2013.01); H01M 10/0525 (2013.01); C01P 2004/32 (2013.01); C01P 2004/64 (2013.01); C01P 2006/11 (2013.01); C01P 2006/40 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method for producing a composite conductive material, comprising:
(S1) supporting catalyst particles on surfaces of spherical carbon particles;
(S2) heat treating the catalyst particles in a helium or hydrogen atmosphere such that the catalyst particles penetrate the surfaces of the spherical carbon particles and are impregnated beneath the surfaces of the spherical carbon particles at a contact point between the spherical carbon particles and the impregnated catalyst particles;
(S3) heating the spherical carbon particles having the impregnated catalyst particles in the presence of a source gas to grow carbon nanofibers from the impregnated catalyst particles to form the composite conductive material, wherein the source gas contains a carbon source, and wherein the carbon nanofibers extend from the contact point to above the surfaces of the spherical carbon particles, and
oxidizing the spherical carbon particles prior to supporting the catalyst particles on the spherical carbon particles in step (S1).