US 12,315,911 B2
Lithium-sulfur battery with improved performances
Florent Fischer, Bruges (FR); Thierry Hezeque, Aubie Espessas (FR); Laura Maria Para, Cordoba Capital (AR); Cecilia Andrea Calderon, Córdoba (AR); and Robert Dominko, Dol pri Ljubljani (SI)
Assigned to SAFT, Levallois-Perret (FR); and KEMIJSKI INSTITUT, Ljubljana (SI)
Appl. No. 17/628,053
Filed by SAFT, Levallois-perret (FR); and KEMIJSKI INSTITUT, Ljubljana (SI)
PCT Filed Aug. 22, 2019, PCT No. PCT/IB2019/001308
§ 371(c)(1), (2) Date Jan. 18, 2022,
PCT Pub. No. WO2021/033008, PCT Pub. Date Feb. 25, 2021.
Prior Publication US 2022/0278309 A1, Sep. 1, 2022
Int. Cl. H01M 4/136 (2010.01); H01M 4/02 (2006.01); H01M 4/134 (2010.01); H01M 4/38 (2006.01); H01M 4/58 (2010.01); H01M 4/62 (2006.01); H01M 10/052 (2010.01); H01M 10/0569 (2010.01)
CPC H01M 4/136 (2013.01) [H01M 4/134 (2013.01); H01M 4/382 (2013.01); H01M 4/5815 (2013.01); H01M 4/625 (2013.01); H01M 10/052 (2013.01); H01M 10/0569 (2013.01); H01M 2004/021 (2013.01); H01M 2300/0034 (2013.01); H01M 2300/0037 (2013.01)] 15 Claims
 
1. An electrochemical cell of the lithium/sulfur type comprising:
a) a cathode comprising:
i) microporous carbon in the form of particles, the particle size distribution being characterized by a median volume diameter Dv50 of the particles which is greater than or equal to 1 μm and less than or equal to 5 μm;
ii) sulfur having an oxidation degree in the range of 0 to −2 in the pores of the microporous carbon;
b) an electrolyte comprising a solvent, said solvent comprising at least one fluorinated carbonate;
c) an anode composed of lithium metal or of a lithium metal alloy,
wherein the particles of microporous carbon have a specific surface area of more than 1000 m2/g,
the fluorinated carbonate accounts for from 10 to 90% of the volume of the solvent, and
the microporous carbon has a porous structure composed of pores having an average diameter ranging from 0.5 nm to less than 2 nm.