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| 국가/구분 | United States(US) Patent 등록 |
|---|---|
| 국제특허분류(IPC7판) |
|
| 출원번호 | UP-0861252 (2007-09-25) |
| 등록번호 | US-7718319 (2010-06-10) |
| 발명자 / 주소 |
|
| 출원인 / 주소 |
|
| 대리인 / 주소 |
|
| 인용정보 | 피인용 횟수 : 15 인용 특허 : 541 |
The present invention includes compositions and methods of making cation-substituted and fluorine-substituted spinel cathode compositions by firing a LiMn2−y−zLiyMzO4 oxide with NH4HF2 at low temperatures of between about 300 and 700° C. for 2 to 8 hours and a η of more than
The present invention includes compositions and methods of making cation-substituted and fluorine-substituted spinel cathode compositions by firing a LiMn2−y−zLiyMzO4 oxide with NH4HF2 at low temperatures of between about 300 and 700° C. for 2 to 8 hours and a η of more than 0 and less than about 0.50, mixed two-phase compositions consisting of a spinel cathode and a layered oxide cathode, and coupling them with unmodified or surface modified graphite anodes in lithium ion cells.
What is claimed is: 1. A method of making an oxyfluoride composition comprising the steps of: firing a solid state mixture comprising lithium, manganese, and M to obtain a first composition having the formula LiMn2−y−zLiyMzO4; mixing the first composition with a fluorine source to for
What is claimed is: 1. A method of making an oxyfluoride composition comprising the steps of: firing a solid state mixture comprising lithium, manganese, and M to obtain a first composition having the formula LiMn2−y−zLiyMzO4; mixing the first composition with a fluorine source to form a second mixture; and heating the second mixture at a temperature within the range of about 200° C. to about 700° C. for 2 hours to 8 hours to form a cation-substituted, fluorine-substituted LiMn2−y−zLiyMzO4−ηFη spinel oxide structure, wherein M is a metal, y is within the range of about 0 to about 0.3, z is within the range of about 0 to about 1.0, and wherein η is greater than 0 and less than about 0.5, and wherein the fluorine source is a solid or liquid selected from the group consisting of NH4HF2, ammonium fluoride, or hydrogen fluoride. 2. The method of claim 1, wherein M is selected from the group consisting of Mg, Al, V, Cr, Fe, Ti, Co, Ni, Cu, Zn, Zr, Nb, Mo, Ga, Sn and combinations thereof. 3. The method of claim 1, wherein the fluorine source comprises NH4HF2. 4. The method of claim 1, wherein y is within the range of about 0 to about 0.3, z is within the range of about 0 to about 1.0, and η is within the range of about 0.05 to about 0.25. 5. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source to a temperature within the range of about 425° C. to about 500° C. 6. The method of claim 1, wherein the cation-substituted fluorine-substituted LiMn2−y−zLiyMzO4−ηFη spinel oxide structure is selected from the group consisting of LiMn1.8Li0.2O3.88F0.12, LiMn1.8Li0.2O3.79F0.21, LiMn1.8Li0.1Ti0.1O3.9F0.1, LiMn1.8Li0.1Cu0.1O3.9F0.1, LiMn1.8Li0.1Ni0.1O3.9F0.1, and LiMn1.8Li0.1Ni0.1O3.8F0.2. 7. The method of claim 1, wherein the second composition, when incorporated in a lithium-ion battery, has a capacity greater than about 80 mAh/g. 8. The method of claim 1, wherein M is Ni. 9. The method of claim 1, wherein M is Ti. 10. The method of claim 1, wherein M is Cu. 11. The method of claim 1, wherein η is within the range of about 0.05 to about 0.27. 12. The method of claim 1, wherein η is within the range of about 0.1 to about 0.25. 13. The method of claim 1, wherein y is within the range of about 0.05 to about 0.27. 14. The method of claim 1, wherein y is within the range of about 0.1 to about 0.25. 15. The method of claim 1, wherein y is within the range of about 0.1 to about 0.2. 16. The method of claim 1, wherein y is within the range of about 0.1 to about 0.15. 17. The method of claim 1, wherein z is within the range of about 0.1 to about 0.9. 18. The method of claim 1, wherein y is within the range of about 0.2 to about 0.8. 19. The method of claim 1, wherein y is within the range of about 0.3 to about 0.7. 20. The method of claim 1, wherein y is within the range of about 0.4 to about 0.6. 21. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source at a temperature within the range of about 200° C. to about 649° C. 22. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source at a temperature within the range of about 300° C. to about 600° C. 23. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source at a temperature within the range of about 350° C. to about 550° C. 24. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source at a temperature within the range of about 400° C. to about 500° C. 25. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source at a temperature within the range of about 425° C. to about 475° C. 26. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source for about 2 hours to about 6 hours. 27. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source for about 2 hours to about 5 hours. 28. The method of claim 1, wherein the first composition is heated in the presence of the fluorine source for about 2 hours to about 4 hours. 29. The method of claim 1, wherein the fluorine source comprises NH4F. 30. The method of claim 1, wherein the second composition is LiMn1.8Li0.2O3.88F0.12. 31. The method of claim 30, wherein the fluorine source comprises NH4HF2. 32. The method of claim 31, wherein the first composition is heated in the presence of a fluorine source at a temperature within the range of about 400° C. to about 500° C. 33. The method of claim 1, wherein the second composition is LiMn1.8Li0.2O3.79F0.21. 34. The method of claim 33, wherein the fluorine source comprises NH4HF2. 35. The method of claim 34, wherein the first composition is heated in the presence of a fluorine source at a temperature within the range of about 400° C. to about 500° C. 36. The method of claim 1, wherein the second composition is LiMn1.8Li0.1Ti0.1O3.9F0.1. 37. The method of claim 36, wherein the fluorine source comprises NH4HF2. 38. The method of claim 37, wherein the first composition is heated in the presence of a fluorine source at a temperature within the range of about 400° C. to about 500° C. 39. The method of claim 1, wherein the second composition is LiMn1.8Li0.1Cu0.1O3.9F0.1. 40. The method of claim 39, wherein the fluorine source comprises NH4HF2. 41. The method of claim 40, wherein the first composition is heated in the presence of a fluorine source at a temperature within the range of about 400° C. to about 500° C. 42. The method of claim 1, wherein the second composition is LiMn1.8Li0.1Ni0.1O3.9F0.1. 43. The method of claim 42, wherein the fluorine source comprises NH4HF2. 44. The method of claim 43, wherein the first composition is heated in the presence of a fluorine source at a temperature within the range of about 400° C. to about 500° C. 45. The method of claim 1, wherein the second composition is LiMn1.8Li0.1Ni0.1O3.8F0.2. 46. The method of claim 45, wherein the fluorine source comprises NH4HF2. 47. The method of claim 46, wherein the first composition is heated in the presence of a fluorine source at a temperature within the range of about 400° C. to about 500° C.
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