US 11,876,188 B2
Electrolyte for use in sodium-sulfur batteries
Vipin Kumar, Singapore (SG); and Zhi Wei Seh, Singapore (SG)
Assigned to AGENCY FOR SCIENCE, TECHNOLOGY AND RESEARCH, Singapore (SG)
Appl. No. 17/773,568
Filed by Agency for Science, Technology and Research, Singapore (SG)
PCT Filed Oct. 26, 2020, PCT No. PCT/SG2020/050613
§ 371(c)(1), (2) Date Apr. 29, 2022,
PCT Pub. No. WO2021/086264, PCT Pub. Date May 6, 2021.
Claims priority of application No. 10201910055R (SG), filed on Oct. 29, 2019.
Prior Publication US 2022/0367923 A1, Nov. 17, 2022
Int. Cl. H01M 10/00 (2006.01); H01M 10/39 (2006.01); H01M 4/38 (2006.01)
CPC H01M 10/3927 (2013.01) [H01M 4/381 (2013.01); H01M 2300/0028 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An electrolyte comprising:
a) a sodium salt;
b) an additive comprising at least one additional metallic/metalloid cation having a standard reduction potential which is at least 2.5V more positive than that of sodium cation;
wherein said sodium salt and said additive are dispersed in a solvent comprising at least one alkyl carbonate, and wherein the concentration of said metallic/metalloid cation in the electrolyte is 20 mM to 100 mM.