Sulfone sulfonylimide combinations for advanced battery chemistries
Disclosed is an electrochemical cell, which may be used for advanced rechargeable batteries. The electrochemical cell comprises two or more electrodes within an electrolyte solution, where the electrolyte solution containing (i) an aliphatic or cyclic sulfone and (ii) a metal perfluoroalkylsulfonylimide salt.
1. An electrochemical cell comprising:
two or more electrodes operably connected to an electrolyte solution, the electrolyte solution containing:
an aliphatic or cyclic sulfone; and
a metal perfluoroalkylsulfonylimide salt, wherein the metal perfluoroalkylsulfonylimide salt has a total molar mass >200 g/mol and is present in the electrolyte solution at a concentration of between 0.1 M and 10 M.
2. The electrochemical cell according to claim 1 , wherein the aliphatic or cyclic sulfone is tetramethylene sulfone (sulfolane), trimethylene sulfone (TriMS), 1-methyltrimethylene sulfone (MTS), ethylmethyl sulfone (EMS), ethyl-sec-butyl sulfone (EsBS), ethyl-iso-butyl sulfone (EiBS), ethyl-iso-propyl sulfone (EiPS), trifluoropropylmethyl sulfone (FPMS), dimethylsulfone, methanesulfonyl fluoride, or a combination thereof.
3. The electrochemical cell according to claim 2 , wherein the electrolyte solution further comprises water.
4. The electrochemical cell according to claim 1 , wherein the metal perfluoroalkylsulfonylimide salt comprises Li, Na, Zn, Mg, Ca, or Al.
5. The electrochemical cell according to claim 1 , wherein the metal perfluoroalkylsulfonylimide salt is lithium bis(trifluoromethane)sulfonimide (LiTFSI), lithium bis(perfluoroethanesulfonyl)imide (LiBETI), sodium bis(fluorosulfonyl)imide (NaFSI), magnesium bis(trifluoromethane)sulfonimide (Mg(TFSI) 2 ), zinc bis(trifluoromethane)sulfonimide (Zn(TFSI) 2 ), or combinations thereof.
6. The electrochemical cell according to claim 1 , further comprising a separator positioned at least partially between the electrodes.
7. The electrochemical cell according to claim 6 , wherein the separator is a porous polyolefin or glass microfiber separator, a polymer separator that is gellable with the electrolytes, or a ceramic or glass solid electrolyte separator.
8. The electrochemical cell according to claim 1 , further comprising an additive which is present in the electrolyte solution in an amount of between 0.01% and 10% by weight.
9. The electrochemical cell according to claim 1 , wherein the electrochemical cell is configured to output at a voltage greater than 3.0V.
10. The electrochemical cell according to claim 1 , wherein the electrochemical cell is a battery, a capacitor, a supercapacitor, or an electrolysis cell.