US 12,080,850 B2
Non-aqueous electrolyte compositions
Jeremy Barker, Oxfordshire (GB); and Ruth Sayers, South Yorkshire (GB)
Assigned to Faradion Limited, South Yorkshire (GB)
Appl. No. 16/771,769
Filed by FARADION LIMITED, South Yorkshire (GB)
PCT Filed Dec. 13, 2018, PCT No. PCT/GB2018/053625
§ 371(c)(1), (2) Date Jun. 11, 2020,
PCT Pub. No. WO2019/116044, PCT Pub. Date Jun. 20, 2019.
Claims priority of application No. 1720745 (GB), filed on Dec. 13, 2017.
Prior Publication US 2021/0175544 A1, Jun. 10, 2021
Int. Cl. H01M 10/0569 (2010.01); H01M 4/583 (2010.01); H01M 4/587 (2010.01); H01M 10/054 (2010.01); H01M 10/0567 (2010.01); H01M 10/0568 (2010.01); H01M 4/02 (2006.01)
CPC H01M 10/0569 (2013.01) [H01M 4/583 (2013.01); H01M 4/587 (2013.01); H01M 10/054 (2013.01); H01M 10/0567 (2013.01); H01M 10/0568 (2013.01); H01M 2004/027 (2013.01); H01M 2300/004 (2013.01); H01M 2300/0042 (2013.01)] 10 Claims
 
1. A non-aqueous electrolyte composition comprising:
a) one or more sodium-containing salts of the general formula NaMFX, where M is selected from the group consisting of aluminum (A13+), boron (B3+), gallium (Ga3+), indium (In3+), scandium (Sc3+), Yttrium (Y3+), lanthanum (La3+), phosphorus (P5+), and arsenic (As5+), and x=4 or 6; and
b) a solvent system which comprises:
i) a first solvent component which comprises propylene carbonate (PC) and one or more further solvents selected from the group consisting of diethyl carbonate (DEC), dimethyl carbonate (DMC), ethylene carbonate (EC), and ethyl methyl carbonate (EMC); and
ii) a second solvent component which comprises one or more ethylene oxide-based glymes selected from the group consisting of diethylene glycol dimethyl ether (diglyme), triethylene glycol dimethyl ether (triglyme), and tetraethylene glycol dimethyl ether (tetraglyme);
wherein the molar ratio of propylene carbonate: second solvent component is in the range 1:0.2 to 1:2.