Lithium cell with cathode including iron disulfide and iron sulfide
First Claim
Patent Images
1. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising at least one of a lithium metal and lithium alloy;
a cathode comprising iron disulfide (FeS2), iron sulfide (FeS), and conductive carbon, said cell further comprising an electrolyte inserted therein, said electrolyte comprising a lithium salt comprising bistrifluoromethylsulfonyl imide (Li(CF3SO2)2N) dissolved in a solvent mixture comprising dioxolane and sulfolane.
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Abstract
A primary cell having an anode comprising lithium or lithium alloy and a cathode comprising iron disulfide (FeS2), iron sulfide (FeS) and carbon particles. The electrolyte comprises a lithium salt dissolved in a solvent mixture. A cathode slurry is prepared comprising iron disulfide (FeS2) powder, iron sulfide (FeS) powder, carbon, binder, and a liquid solvent. The mixture is coated onto a conductive substrate and solvent evaporated leaving a dry cathode coating on the substrate. The anode and cathode can be spirally wound with separator therebetween and inserted into the cell casing with electrolyte then added.
56 Citations
60 Claims
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1. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising at least one of a lithium metal and lithium alloy;
a cathode comprising iron disulfide (FeS2), iron sulfide (FeS), and conductive carbon, said cell further comprising an electrolyte inserted therein, said electrolyte comprising a lithium salt comprising bistrifluoromethylsulfonyl imide (Li(CF3SO2)2N) dissolved in a solvent mixture comprising dioxolane and sulfolane. - View Dependent Claims (2, 3, 5, 6, 7, 8, 9)
- a positive and a negative terminal;
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10. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising at least one of a lithium metal and lithium alloy;
a cathode comprising iron disulfide (FeS2), iron sulfide (FeS), and conductive carbon, said cell further comprising an electrolyte inserted therein, said electrolyte comprising a lithium salt comprising bistrifluoromethylsulfonyl imide (Li(CF3SO2)2N) dissolved in a solvent mixture comprising dioxolane and sulfolane, wherein said electrolyte further comprises an additive comprising an alkylpyrazole. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
- a positive and a negative terminal;
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19. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising at least one of a lithium metal and lithium alloy;
a cathode comprising iron disulfide (FeS2), iron sulfide (FeS), and conductive carbon, said cell further comprising an electrolyte inserted therein, said electrolyte comprising a lithium salt comprising bistrifluoromethylsulfonyl imide (Li(CF3SO2)2N) dissolved in a solvent mixture comprising dioxolane and sulfolane, wherein said electrolyte further comprises an additive comprising an alkylimidazole. - View Dependent Claims (20, 21, 22, 23, 24, 25)
- a positive and a negative terminal;
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26. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising at least one of a lithium metal and lithium alloy;
a cathode comprising iron disulfide (FeS2), iron sulfide (FeS), and conductive carbon, said cell further comprising an electrolyte inserted therein, said electrolyte comprising a lithium salt comprising lithium iodide (LiI) dissolved in a solvent mixture comprising dioxolane, dimethoxyethane, and sulfolane. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40)
- a positive and a negative terminal;
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41. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising lithium;
a cathode comprising iron disulfide (FeS2), iron sulfide (FeS), and conductive carbon, said cell further comprising an electrolyte comprising a lithium salt comprising bistrifluoromethylsulfonyl imide (Li(CF3SO2)2N) dissolved in a solvent comprising dimethoxyethane, sulfolane, and tin iodide (SnI2) additive. - View Dependent Claims (42, 43, 44, 45, 46, 47, 48, 49, 50)
- a positive and a negative terminal;
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51. A primary electrochemical cell comprising a housing;
- a positive and a negative terminal;
an anode comprising lithium;
a cathode comprising iron disulfide (FeS2) and conductive carbon, said cell further comprising an electrolyte comprising a lithium salt comprising lithium iodide (LiI) dissolved in a solvent comprising dimethoxyethane, sulfolane, and tin iodide (SnI2) additive. - View Dependent Claims (52, 53, 54, 55, 56, 57, 58, 59, 60)
- a positive and a negative terminal;
Specification