US 12,015,148 B2
Silicon particles for anode materials of lithium ion batteries
Sefer Ay, Munich (DE); Dominik Jantke, Burghausen (DE); Jürgen Stohrer, Pullach (DE); Sebastian Suckow, Burghausen (DE); and Harald Voit, Reischach (DE)
Assigned to WACKER CHEMIE AG, Munich (DE)
Appl. No. 16/484,822
Filed by WACKER CHEMIE AG, Munich (DE)
PCT Filed Feb. 9, 2017, PCT No. PCT/EP2017/052883
§ 371(c)(1), (2) Date Aug. 8, 2019,
PCT Pub. No. WO2018/145750, PCT Pub. Date Aug. 16, 2018.
Prior Publication US 2020/0028164 A1, Jan. 23, 2020
Int. Cl. H01M 4/38 (2006.01); H01M 4/134 (2010.01); H01M 4/36 (2006.01); H01M 4/587 (2010.01); H01M 4/62 (2006.01); H01M 10/0525 (2010.01); H01M 4/02 (2006.01)
CPC H01M 4/386 (2013.01) [H01M 4/134 (2013.01); H01M 4/366 (2013.01); H01M 4/587 (2013.01); H01M 4/625 (2013.01); H01M 10/0525 (2013.01); H01M 2004/021 (2013.01); H01M 2004/027 (2013.01)] 20 Claims
OG exemplary drawing
 
1. Anode materials for lithium-ion batteries comprising:
one or more binders,
optionally graphite,
optionally one or more further electrically conductive components,
optionally one or more additives, and
non-aggregated, spherical, non-porous silicon particles having average particle sizes of 1 to 10 μm and a silicon content of 97% to 99.8% by weight, wherein the silicon content is based on the total weight of the silicon particles minus any oxygen contents, the silicon is in elemental form, and wherein ≥80% of the silicon particles have an orthogonal axial ratio R of 0.60≤R≤1.0, wherein the orthogonal axial ratio R is the quotient of the two largest mutually orthogonal diameters through a silicon particle and the larger diameter forms the denominator and the smaller diameter forms the numerator of the quotient, as determined by SEM image.