US 11,843,112 B2
Composite material
Johannes Roethinger, Meitingen (DE); Christian Schreiner, Meitingen (DE); and Bernt Ketterer, Meitingen (DE)
Assigned to SGL CARBON SE, Wiesbaden (DE)
Appl. No. 16/616,625
Filed by SGL CARBON SE, Wiesbaden (DE)
PCT Filed Jun. 28, 2018, PCT No. PCT/EP2018/067485
§ 371(c)(1), (2) Date Nov. 25, 2019,
PCT Pub. No. WO2019/002508, PCT Pub. Date Jan. 3, 2019.
Claims priority of application No. 10 2017 211 086.4 (DE), filed on Jun. 29, 2017.
Prior Publication US 2020/0194780 A1, Jun. 18, 2020
Int. Cl. H01M 4/587 (2010.01); H01M 4/36 (2006.01); H01M 4/38 (2006.01); H01M 10/0525 (2010.01); H01M 10/054 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/364 (2013.01) [H01M 4/386 (2013.01); H01M 4/587 (2013.01); H01M 10/054 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 8 Claims
OG exemplary drawing
 
1. A composite material, comprising:
silicon and a carbon matrix, wherein a proportion of silicon in the composite material is 1-80 wt.-% and at least 90 wt.-% of the composite material is in a density range between a lower density threshold value ρ*1 and an upper density threshold value ρ*2, wherein the density threshold values ρ*1,2 have the following relation:
ρ*1,2=(1±δ)·ρ
wherein ρ is a mean density of the composite material and ±δ is a variation range between the upper density threshold value ρ*2 and the lower density threshold value ρ*1, an amount of δ being <0.10; and
wherein the composite material meets the following condition:

OG Complex Work Unit Math
where
d50Si stands for a mean size of the silicon particle in the unit ‘μm’
pc stands for an amount of carbon in the composite material, expressed as wt.-%,
pSi stands for an amount of silicon in the composite material, expressed as wt.-%, and
s is a security parameter which is 0.02.