US 11,749,831 B2
Li—S battery with carbon coated separator
David Kim, Santa Fe, NM (US); Xiangwu Zhang, Cary, NC (US); and Jiadeng Zhu, Charlottesville, VA (US)
Assigned to SCEYE SA, Zug (CH)
Appl. No. 15/756,714
Filed by SCEYE SA, Zug (CH)
PCT Filed Sep. 2, 2015, PCT No. PCT/EP2015/070030
§ 371(c)(1), (2) Date Mar. 1, 2018,
PCT Pub. No. WO2017/036522, PCT Pub. Date Mar. 9, 2017.
Prior Publication US 2018/0287121 A1, Oct. 4, 2018
Int. Cl. H01M 10/052 (2010.01); H01M 50/44 (2021.01); H01M 50/109 (2021.01); H01M 50/446 (2021.01); H01M 50/437 (2021.01); H01M 50/451 (2021.01); H01M 50/454 (2021.01); H01M 4/38 (2006.01); H01M 10/0585 (2010.01)
CPC H01M 10/052 (2013.01) [H01M 4/382 (2013.01); H01M 10/0585 (2013.01); H01M 50/109 (2021.01); H01M 50/437 (2021.01); H01M 50/44 (2021.01); H01M 50/446 (2021.01); H01M 50/451 (2021.01); H01M 50/454 (2021.01)] 15 Claims
OG exemplary drawing
 
1. A Li—S battery cell comprising
a Sulphur-containing cathode,
a Lithium-containing anode,
a non-woven glass fiber separator made of glass fibers having diameters below 2 microns, in between the cathode and anode
with an electrolyte on both sides of the glass fiber separator filling interspaces between the anode and the cathode;
wherein the glass fiber separator is coated with a carbon particle coating comprising a mixture of a polymer and electrically conductive nano-sized carbon particles for preventing polysulfides from migrating from the Sulphur-containing cathode to the Lithium anode,
wherein the glass fiber separator abuts the Sulphur-containing cathode, wherein the carbon particle coating is oriented towards the cathode and is in electrical contact with the cathode,
wherein the carbon particle coating has a thickness in the interval of 10-80 microns, and
wherein the carbon loading in the carbon particle coating is in the interval of 0.5-1 mg/cm2.