Electrolyte formulations for gas suppression and methods of use
View Patent ↗Combinations of additives for use in electrolyte formulations that provide a number of desirable characteristics when implemented within batteries, such as reduction, suppression, and/or inhibition of undesirable gas generation over several cycles of charging and discharging, in some cases during operation at high temperature and in some cases during high temperature storage.
1. A battery comprising:
an anode;
a cathode; and
a liquid electrolyte comprising a polymer additive in solution with an electrolyte solvent and a solid-electrolyte interface promoting additive, wherein the polymer additive comprises one or more of poly[(N-vinyl pyrrolidone)-co-(vinyl acetate)] and poly[1,6-bis(p-carboxyphenoxy)hexane].
2. The battery of claim 1 wherein the solid-electrolyte interface promoting additive comprises an inorganic silicon containing additive in solution with an electrolyte solvent.
3. The battery of claim 2 , wherein the inorganic silicon containing additive comprises calcium metasilicate.
4. The battery of claim 1 , wherein the polymer additive comprises poly[(N-vinyl pyrrolidone)-co-(vinyl acetate)].
5. The battery of claim 3 , wherein the polymer additive comprises poly[(N-vinyl pyrrolidone)-co-(vinyl acetate)].
6. The battery of claim 1 , wherein the polymer additive comprises poly[1,6-bis(p-carboxyphenoxy)hexane].
7. The battery of claim 1 wherein the solid-electrolyte interface promoting additive comprises a film forming additive.
8. The battery of claim 7 , wherein the film forming additive is selected from the group consisting of gamma butyrolactone and succinonitrile.
9. The battery of claim 1 further comprising a lithium salt additive.
10. The battery of claim 9 , wherein the lithium salt additive is selected from the group consisting of lithium tetrafluoroborate (LiBF 4 ), lithium difluoro(oxalato)borate (LiFOB), and lithium bis(oxalato)borate (LiBOB.
11. The battery of claim 1 , wherein the cathode comprises LiNi 0.5 Mn 1.5 O 4 .
12. A method of making a battery, comprising:
assembling an anode, a cathode, and a liquid electrolyte, wherein the liquid electrolyte comprises a solid-electrolyte interface promoting additive and a polymer additive in solution with an electrolyte solvent.
13. The method of claim 12 , wherein the solid-electrolyte interface promoting additive comprises an inorganic silicon containing additive in solution with an electrolyte solvent.
14. The method of claim 13 wherein the inorganic silicon containing additive comprises calcium metasilicate.
15. The method of claim 12 , wherein the polymer additive comprises one or more of poly[(N-vinyl pyrrolidone)-co-(vinyl acetate)] and poly[1,6-bis(p-carboxyphenoxy)hexane].
16. The method of claim 14 wherein the polymer additive comprises poly[(N-vinyl pyrrolidone)-co-(vinyl acetate)].
17. The method of claim 12 , wherein the cathode comprises LiNi 0.5 Mn 1.5 O 4 .
18. The method of claim 12 , wherein the solid-electrolyte interface promoting additive comprises a film forming additive.
19. The method of claim 18 , wherein the film forming additive is selected from the group consisting of gamma butyrolactone and succinonitrile.
20. The method of claim 16 , wherein the solid-electrolyte interface promoting additive comprises a lithium salt additive.
21. The method of claim 20 , wherein the lithium salt additive is selected from the group consisting of lithium tetrafluoroborate (LiBF 4 ), lithium difluoro(oxalato)borate (LiFOB), and lithium bis(oxalato)borate (LiBOB.