Electrochemical cells are disclosed. In some embodiments, an electrochemical cell includes a cathode, an anode, and an electrolyte having a first lithium salt and LiBF4.
대표청구항▼
What is claimed is: 1. A primary electrochemical cell, comprising (1) a cathode including an active cathode material selected from the group consisting of manganese dioxide and iron disulfide, the active cathode material including water, (2) an anode comprising lithium (3)an aluminum couple, and (4
What is claimed is: 1. A primary electrochemical cell, comprising (1) a cathode including an active cathode material selected from the group consisting of manganese dioxide and iron disulfide, the active cathode material including water, (2) an anode comprising lithium (3)an aluminum couple, and (4) an electrolyte, in contact with a surface of the aluminum couple, and comprising (a) from about 300 ppm to about 10,000 ppm of LiBF4 to reduce corrosion of the aluminum couple, (b) LiPF6, and (c) a third lithium salt selected from the group consisting of lithium trifluoromethanesulfonate and lithium trifluoromethanesulphonylimide. 2. The cell of claim 1, wherein the third lithium salt comprises lithium trifluoromethanesulfonate. 3. The cell of claim 1, wherein the electrolyte includes both lithium trifluoromethanesulfonate and lithium trifluoromethanesulphonylimide. 4. The cell of claim 1, wherein the active cathode material is manganese dioxide. 5. The cell of claim 1, wherein the aluminum couple includes two aluminum surfaces in electrical contact with each other. 6. The cell of claim 5, wherein the aluminum couple comprises a cathode current collector comprising aluminum and a positive lead comprising aluminum. 7. The cell of claim 1, wherein the electrolyte further comprises a material selected from the group consisting of ethylene carbonate, propylene carbonate, dimethoxyethane, and butylene carbonate. 8. The cell of claim 1, wherein the electrolyte further comprises dimethoxyethane. 9. The cell of claim 1, wherein the electrolyte further comprises ethylene carbonate. 10. The cell of claim 1, wherein the electrolyte further comprises butylene carbonate. 11. The cell of claim 1, wherein the electrolyte comprises dioxolane. 12. The cell of claim 1, wherein the aluminum couple comprises a cathode current collector comprising aluminum in electrical contact with a positive lead comprising a metal other than aluminum. 13. The cell of claim 1, wherein the active cathode material is iron disulfide. 14. The cell of claim 1, wherein the electrolyte comprises lithium salts consisting of (a), (b), and (c). 15. The cell of claim 14, wherein the lithium salts consist of LiBF4, LiPF6, and lithium trifluoromethanesulfonate. 16. The cell of claim 1, wherein the electrolyte does not include a perchlorate salt. 17. The cell of claim 1, wherein the electrolyte comprises from about 300 ppm to about 5,000 ppm of LiBF4. 18. The cell of claim 1, wherein the electrolyte further comprises propylene carbonate. 19. The cell of claim 1, wherein the electrolyte includes at least 0.1 M of LiPF6 by weight. 20. A method, comprising: discharging an electrochemical cell only once, the cell comprising a cathode comprising manganese oxide and/or iron disulfide, an anode comprising lithium, an aluminum couple; and an electrolyte, in contact with a surface of the aluminum couple, and comprising (a)from about 300 ppm to about 10,000 ppm LiBF4 to reduce corrosion of the aluminum couple, (b) LiPF6, and (c) a third lithium salt selected from the group consisting of lithium trifluoromethanesulfonate and lithium trifluoromethanesulphonvlimide; and disposing the cell without recharging the cell. 21. The method of claim 20, wherein the aluminum couple comprises a cathode current collector comprising aluminum in electrical contact with a positive lead comprising a metal other than aluminum. 22. The method of claim 20, wherein the aluminum couple comprises a cathode current collector comprising aluminum in electrical contact with a positive lead comprising aluminum. 23. The method of claim 20, wherein the electrolyte comprises lithium salts consisting of (a), (b), and (c). 24. The method of claim 20, wherein the electrolyte does not include a perchlorate salt. 25. The method of claim 20, wherein the electrolyte comprises a material selected from the group consisting of ethylene carbonate, propylene carbonate, dimethoxyethane, dioxolane,and butylene carbonate. 26. The method of claim 20, wherein the active cathode material is iron disulfide. 27. The cell of claim 20, wherein the electrolyte includes at least 0.1 M of LiPF6 by weight. 28. A method of making a primary electrochemical cell in which the corrosion of an aluminum couple is suppressed, the method including adding a sufficient quantity of LiBF4 to an electrolyte including LiPF6 and a third lithium salt selected from the group consisting of lithium trifluoromethanesulfonate and lithium trifluoromethanesulphonylimide to shift corrosion potential of an aluminum electrode by at least 127 mV when tested by continuous cyclic voltammetry in an electrochemical glass cell having an aluminum working electrode, a lithium reference electrode, and two lithium auxiliary electrodes, the continuous cyclic voltammetry including cycles in which the potential initially is set to an open circuit potential, then anodically scanned to +4.5 V, and then reversed to an open circuit potential, the scan rate being 50 mV/sec, the corrosion potential being the potential at which anodic current density reached 10-4A/cm2 at a first cycle; and incorporating the electrolyte into an electrochemical cell comprising a cathode including an active cathode material selected from the group consisting of manganese dioxide and iron disulfide, the active cathode material including water, an anode comprising lithium, and an aluminum couple in contact with the electrolyte. 29. The method of claim 28, wherein the method also includes discharging the cell only once and disposing the cell without recharging the cell. 30. The method of claim 28, wherein the aluminum couple includes cathode current collector comprising aluminum is in electrical contact with a positive lead comprising a metal other than aluminum. 31. The method of claim 30, wherein the metal is stainless steel. 32. The method of claim 28, wherein the aluminum couple comprising a cathode current collector comprising aluminum in electrical contact with a positive lead comprising aluminum. 33. The method of claim 28, wherein the active cathode material is iron disulfide. 34. The method of claim 28, wherein the active cathode material is manganese dioxide. 35. The method of claim 28, wherein the electrolyte comprises lithium salts consisting of LiBF4, LiPF6, and lithium trifluoromethanesulphonylimide and/or lithium trifluoromethanesulfonate. 36. The method of claim 35, wherein the lithium salts consist of LiBF4, LiPF6,and lithium trifluoromethanesulphonylimide. 37. The method of claim 35, wherein the lithium salts consist of LiBF4, LiPF6, and lithium trifluoromethanesulfonate. 38. The method of claim 28, wherein the electrolyte does not include a perchlorate salt. 39. The method of claim 28, wherein the electrolyte comprises from about 300 ppm to about 5,000 ppm of the LiBF4. 40. The method of claim 28, wherein the electrolyte comprises a material selected from the group consisting of ethylene carbonate, propylene carbonate, dimethoxyethane, and butylene carbonate. 41. The method of claim 28, wherein the electrolyte comprises dioxolane. 42. The cell of claim 28, wherein the electrolyte includes at least 0.1 M of LiPF6 by weight.
Krause Larry J. (Stillwater MN) Summerfield John W. (Rosemount MN), Battery containing bis(perfluoroalkylsulfonyl)imide and cyclic perfluoroalkylene disulfonylimide salts.
Flandrois Serge (Pessac FRX) Fevrier Annie (St. Medard en Jalles FRX) Biensan Philippe (Epinay S/Orge FRX) Simon Bernard (Issy Les Moulineaux FRX), Carbon anode for a lithium rechargeable electrochemical cell and a process for its production.
Vu Viet H. ; Fontaine Lucien P. ; McHugh William T. ; Pinault Robert J. ; Blasi Jane A. ; Sullivan Steven K. ; Paquin Geoffrey J. ; Johnson Stephen S. ; Maus Gary K. ; Cambra Lance E., Current interrupter for electrochemical cells.
Shah Pinakin M. ; Kronenberg Marvin L. ; Bis Richard F. ; Warburton Donald L. ; Bytella Joseph J. ; Meshri Dayal T., Electrochemical power cells and method of improving electrochemical power cell performance.
Ebel Steven J. (Tonawanda NY) Pyszczyk Michael F. (Hamburg NY) Frysz Christine A. (East Amherst NY) Zelinsky Michael A. (Lancaster NY), High energy density non-aqueous electrolyte lithium cell operational over a wide temperature range.
Shackle Dale R. (The Mead Corporation ; Mead World Headquarters ; Courthouse Plaza Northeast Dayton OH 45463) Fauteux Denis G. (The Mead Corporation ; Mead World Headquarters ; Courthouse Plaza North, High power solid state electrochemical laminar cell.
Hiroyuki Sakamoto JP; Hiroshi Tada JP; Toshihisa Tamai JP, Metal foil for collector and method of manufacturing the same, collector for secondary battery and secondary battery.
Takeuchi Esther S. (East Amherst NY) Leising Randolph A. (Williamsville NY), Nonaqueous electrochemical cell having a mixed cathode and method of preparation.
Takeuchi Esther S. (East Amherst NY) Walsh Karen M. (Marilla NY), Reduced voltage delay additive for nonaqueous electrolyte in alkali metal electrochemical cell.
Loganathan, Kavi G.; Jiang, Junwei; Wyatt, Perry M.; Bose, Deepan Chakkaravarthi; Gerner, Scott D., Capacitor electrodes for lead-acid battery with surface-modified additives.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.