US 12,224,400 B2
Lithium/sulphur electrochemical cell
Florent Fischer, Bruges (FR); Thierry Hezeque, Aubie Espessas (FR); and Christian Jordy, St Louis de Montferrand (FR)
Assigned to SAFT, Levallois-Perret (FR)
Appl. No. 17/044,482
Filed by SAFT, Levallois-Perret (FR)
PCT Filed Apr. 9, 2019, PCT No. PCT/EP2019/058969
§ 371(c)(1), (2) Date Oct. 1, 2020,
PCT Pub. No. WO2019/197410, PCT Pub. Date Oct. 17, 2019.
Claims priority of application No. 1853161 (FR), filed on Apr. 11, 2018.
Prior Publication US 2021/0151802 A1, May 20, 2021
Int. Cl. H01M 10/0569 (2010.01); H01M 4/02 (2006.01); H01M 4/38 (2006.01); H01M 4/40 (2006.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 10/0568 (2010.01)
CPC H01M 10/0569 (2013.01) [H01M 4/382 (2013.01); H01M 4/405 (2013.01); H01M 4/625 (2013.01); H01M 10/052 (2013.01); H01M 10/0568 (2013.01); H01M 2004/021 (2013.01); H01M 2300/0037 (2013.01)] 19 Claims
OG exemplary drawing
 
1. Lithium/sulphur electrochemical cell (1) comprising:
a) a cathode comprising:
i) carbon having a porous structure (5) comprising pores with a mean diameter less than or equal to 6 nm;
ii) sulphur with a degree of oxidation that can range from 0 to −2 in the pores of the carbon;
b) an electrolyte comprising:
i) at least one organic solvent which is a carbonate;
ii) one or more salts, at least one salt being lithium bis (fluorosulfonyl) imide (LiFSI),
the percentage by mass of lithium bis (fluorosulfonyl) imide being greater than or equal to 50% of the sum of the masses of the one or more salts,
the electrolyte being devoid of any ether;
c) an anode comprising lithium metal or a metallic alloy of lithium, and
wherein the electrolyte does not comprise any ester.