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1. (US20190280334) NOVEL BATTERY SYSTEMS BASED ON TWO-ADDITIVE ELECTROLYTE SYSTEMS INCLUDING 1,2,6-OXODITHIANE-2,2,6,6-TETRAOXIDE
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Claims

1. A nonaqueous electrolyte for a lithium ion battery comprising a lithium salt, a nonaqueous solvent, and an additive mixture comprising a first operative additive that is vinylene carbonate, LiPO 2F 2, fluoroethylene carbonate, or any combination of them, and a second operative additive that is 1,2,6-oxodithiane-2,2,6,6-tetraoxide having the following formula (I):
2. The nonaqueous electrolyte of claim 1, wherein a concentration of the first operative additive is in a range from 0.25 to 6% by weight.
3. The nonaqueous electrolyte of claim 1, wherein the concentration of the second operative additive is in a range from 0.25 to 5% by weight.
4. The nonaqueous electrolyte of claim 1, wherein the concentration of the first operative additive is at least 1% by weight, and the concentration of the second operative additive is at least 1% by weight.
5. The nonaqueous electrolyte of claim 4, wherein the first operative additive is fluoroethylene carbonate.
6. The nonaqueous electrolyte of claim 4, wherein the first operative additive is vinylene carbonate.
7. The nonaqueous electrolyte of claim 4, wherein the first operative additive is LiPO 2F 2
8. The nonaqueous electrolyte of claim 1, wherein the nonaqueous solvent is a carbonate solvent.
9. The nonaqueous electrolyte of claim 8, wherein the nonaqueous solvent is at least one selected from ethylene carbonate and ethyl methyl carbonate.
10. The nonaqueous electrolyte of claim 8, further comprising a second nonaqueous solvent.
11. A lithium-ion battery comprising:
a negative electrode;
a positive electrode; and
a nonaqueous electrolyte comprising lithium ions dissolved in a first nonaqueous solvent, and an additive mixture comprising:
a first operative additive that is fluoroethylene carbonate, LiPO 2F 2, vinylene carbonate, or any combination of them, and
a second operative additive that is 1,2,6-oxodithiane-2,2,6,6-tetraoxide having the following formula (I):
12. The lithium-ion battery of claim 11, wherein a concentration of the first operative additive is in a range from 0.25 to 6% by weight.
13. The lithium-ion battery of claim 11, wherein a concentration of the second operative additive is in a range from 0.25 to 5% by weight.
14. The lithium-ion battery of claim 11, wherein the concentration of the first operative additive is at least 1% by weight, and the concentration of the second operative additive is 1% by weight.
15. The lithium-ion battery of claim 14, wherein the first operative additive is fluoroethylene carbonate.
16. The lithium-ion battery of claim 14, wherein the first operative additive is vinylene carbonate.
17. The lithium-ion battery of claim 14, wherein the first operative additive is LiPO 2F 2.
18. The lithium-ion battery of claim 11, wherein the nonaqueous solvent is a carbonate solvent.
19. The lithium-ion battery of claim 18, wherein the nonaqueous solvent is selected from ethylene carbonate and ethyl methyl carbonate.
20. The lithium-ion battery of claim 18, further comprising a second nonaqueous solvent.
21. The lithium-ion battery of claim 14, wherein a volume of gas produced in the lithium-ion battery is comparable with a volume of gas produced in a lithium-ion battery comprising only the first operative additive.
22. The lithium-ion battery of claim 21, wherein the lithium-ion battery has at least 95% retention of initial capacity after 200 cycles between 3.0 V and 4.3 V at a charging rate of C/3 CCCV at 40° C.
23. The lithium-ion battery of claim 21, wherein the lithium-ion battery has at least 95% retention of initial capacity after 800 cycles between 3.0 V and 4.3 V at a charging rate of C/3 CCCV at 40° C.
24. An electric vehicle with a rechargeable battery comprising:
a drive motor;
gear box;
electronics; and
the lithium-ion battery of claim 11.
25. The electric vehicle of claim 24, wherein a concentration of the first operative additive is in a range from 0.25 to 6% by weight.
26. The electric vehicle of claim 24, wherein a concentration of the second operative additive is in a range from 0.25 to 5% by weight.
27. The electric vehicle of claim 24, wherein the concentration of the first operative additive is at least 1% by weight, and a concentration of the second operative additive is at least 1% by weight.
28. The electric vehicle of claim 27, wherein the first operative additive fluoroethylene carbonate.
29. The electric vehicle of claim 27, wherein the first operative additive is vinylene carbonate.
30. The electric vehicle of claim 27, wherein the first operative additive is LiPO 2F 2.
31. The electric vehicle of claim 24, wherein the nonaqueous solvent is a carbonate solvent.
32. The electric vehicle of claim 31, wherein the nonaqueous solvent is at least one selected from ethylene carbonate and ethyl methyl carbonate.
33. The electric vehicle of claim 32, wherein the lithium-ion battery further comprises a second nonaqueous solvent.
34. The electric vehicle of claim 24, wherein a volume of gas produced in the battery system is comparable with a volume of gas produced in a battery system comprising only the first operative additive.
35. The electric vehicle of claim 24, wherein the battery system has at least 95% retention of initial capacity after 200 cycles between 3.0 V and 4.3 Vat a charging rate of C/3 CCCV at 40° C.
36. The electric vehicle of claim 31, wherein the battery system has at least 95% retention of initial capacity after 800 cycles between 3.0 V and 4.3 Vat a charging rate of C/3 CCCV at 40° C.