IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
UP-0516084
(2006-09-06)
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등록번호 |
US-7566350
(2009-08-05)
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발명자
/ 주소 |
- Bowden, William L.
- Issaev, Nikolai N.
- Pozin, Michael
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출원인 / 주소 |
|
대리인 / 주소 |
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인용정보 |
피인용 횟수 :
2 인용 특허 :
60 |
초록
▼
A lithium electrochemical cell includes an electrolyte having a mixture of solvents including propylene carbonate (PC) and dimethoxyethane (DME), and a salt mixture. The salt mixture includes lithium trifluoromethanesulfonate (LiTFS), and lithium trifluoromethanesulfonimide (LiTFSI), and the cell co
A lithium electrochemical cell includes an electrolyte having a mixture of solvents including propylene carbonate (PC) and dimethoxyethane (DME), and a salt mixture. The salt mixture includes lithium trifluoromethanesulfonate (LiTFS), and lithium trifluoromethanesulfonimide (LiTFSI), and the cell contains less than 1500 ppm by weight of sodium. The mixture of solvents can further include ethylene carbonate (EC).
대표청구항
▼
What is claimed is: 1. A method of manufacturing a lithium electrochemical cell containing less than 1500 ppm by weight of sodium, the method comprising (a) cleaning a case with a solution that does not contain sodium, (b) providing a cathode, an anode, a separator, and an electrolyte comprising pr
What is claimed is: 1. A method of manufacturing a lithium electrochemical cell containing less than 1500 ppm by weight of sodium, the method comprising (a) cleaning a case with a solution that does not contain sodium, (b) providing a cathode, an anode, a separator, and an electrolyte comprising propylene carbonate, dimethoxyethane, lithium trifluoromethanesulfonate, and lithium trifluoromethanesulfonimide, these components having sufficiently low quantities of sodium that, when combined with the case, can provide a lithium electrochemical cell containing less than 1500 ppm by weight of sodium, and (c) assembling the cathode, the anode, the separator, and the electrolyte from step (b) into the case from step (a) to provide a lithium electrochemical cell containing less than 1500 ppm by weight of sodium. 2. The method of claim 1, wherein the cathode includes electrolytic manganese dioxide that has been washed or neutralized after deposition with an agent that does not include sodium. 3. The method of claim 1, wherein the cathode includes electrolytic manganese dioxide that has been washed or neutralized after deposition with lithium hydroxide. 4. The method of claim 1, wherein the cell contains less than 1200 ppm by weight of sodium. 5. The method of claim 1, wherein the cell contains less than 1000 ppm by weight of sodium. 6. The method of claim 1, wherein the cell contains less than 800 ppm by weight of sodium. 7. The method of claim 1, wherein the cell contains less than 600 ppm by weight of sodium. 8. The method of claim 1, wherein the electrolyte comprises: 40-80% by weight of the dimethoxyethane, 20-60% by weight of the propylene carbonate, and between 0.4 M and 1.2 M of the lithium trifluoromethanesulfonate and the lithium trifluoromethanesulfonimide combined. 9. A method of manufacturing a lithium electrochemical cell containing less than 1500 ppm by weight of sodium, the method comprising (a) cleaning a case with a solution that does not contain sodium, (b) providing a cathode, an anode, a separator, and an electrolyte comprising ethylene carbonate, propylene carbonate, dimethoxyethane, lithium trifluoromethanesulfonate, and lithium trifluoromethanesulfonimide, these components having sufficiently low quantities of sodium that, when combined with the case, can provide a lithium electrochemical cell containing less than 1500 ppm by weight of sodium, and (c) assembling the cathode, the anode, the separator, and the electrolyte from step (b) into the case from step (a) to provide a lithium electrochemical cell containing less than 1500 ppm by weight of sodium. 10. The method of claim 9, wherein the cathode includes electrolytic manganese dioxide that has been washed or neutralized after deposition with an agent that does not include sodium. 11. The method of claim 9, wherein the cathode includes electrolytic manganese dioxide that has been washed or neutralized after deposition with lithium hydroxide. 12. The method of claim 9, wherein the cell contains less than 1200 ppm by weight of sodium. 13. The method of claim 9, wherein the cell contains less than 1000 ppm by weight of sodium. 14. The method of claim 9, wherein the cell contains less than 800 ppm by weight of sodium. 15. The cell of claim 9, wherein the cell contains less than 600 ppm by weight of sodium. 16. The method of claim 9, wherein the electrolyte comprises: less than 30% by weight of ethylene carbonate, 40-85% by weight of dimethoxyethane, and between 0.4 M and 1.2 M of the lithium trifluoromethanesulfonate and the lithium trifluoromethanesulfonimide combined. 17. The method of claim 16, wherein the electrolyte comprises: 10-20% by weight of ethylene carbonate; 50-70% by weight of dimethoxyethane. 18. The method of claim 16, wherein the electrolyte comprises: 5-15% by weight of ethylene carbonate; 70-80% by weight of dimethoxyethane; and 10-20% by weight of propylene carbonate.
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