US 11,929,498 B2
Silicon-carbon complex and lithium secondary battery comprising the same
Su Min Lee, Daejeon (KR); Eun Kyung Kim, Daejeon (KR); Yong Ju Lee, Daejeon (KR); Rae Hwan Jo, Daejeon (KR); Dong Hyuk Kim, Daejeon (KR); and Se Mi Park, Daejeon (KR)
Assigned to LG ENERGY SOLUTION, LTD., Seoul (KR)
Appl. No. 16/756,305
Filed by LG CHEM, LTD., Seoul (KR)
PCT Filed Oct. 26, 2018, PCT No. PCT/KR2018/012858
§ 371(c)(1), (2) Date Apr. 15, 2020,
PCT Pub. No. WO2019/083332, PCT Pub. Date May 2, 2019.
Claims priority of application No. 10-2017-0140767 (KR), filed on Oct. 27, 2017.
Prior Publication US 2020/0243853 A1, Jul. 30, 2020
Int. Cl. H01M 4/38 (2006.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/66 (2006.01); H01M 10/0525 (2010.01)
CPC H01M 4/386 (2013.01) [H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/663 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 12 Claims
OG exemplary drawing
 
1. A silicon-carbon complex, comprising:
carbon-based particles; and
silicon-based particles,
wherein the silicon-based particles are dispersed and positioned on surfaces of the carbon-based particles,
the carbon-based particles have a specific surface area of 0.4 m2/g to 1.5 m2/g and a tap density of 0.7 g/cc to 1.0 g/cc, and
the silicon-based particles are doped with one or more elements selected from the group consisting of Mg, Li, Ca, and Al,
wherein the carbon-based particles are spherical artificial graphite secondary particles assembled of carbon-based primary particles, or the carbon-based particles are flake-type artificial graphite particles assembled of plate-type carbon-based primary particles,
wherein the silicon-based particles doped with one or more elements comprise the one or more elements in an amount of 0.5 wt % to 30 wt % based upon a total weight of the silicon-based particles.