Thermal battery electrolyte materials
AssigneeCFD Research Corporation
InventorsPyoungho Choi, Sameer Singhal
Life of this patent
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Abstract
An electrolyte composition can be capable of becoming molten when heated sufficiently. The electrolyte can include at least one lithium halide salt; and at least one lithium non-halide salt combined with the at least one lithium halide salt so as to form an electrolyte composition capable of becoming molten when above a melting point about 350° C. A lithium halide salt includes a halide selected from F and Cl. A first lithium non-halide salt can be selected from the group consisting of LiVO3, Li2SO4, LiNO3, and Li2MoO4. A thermal battery can include the electrolyte composition, such as in the cathode, anode, and/or separator region therebetween. The battery can discharge electricity by having the electrolyte composition at a temperature so as to be a molten electrolyte.
Claims20
A thermal battery comprising:
- an anode having a lithium silicon alloy or lithium aluminum;
- a cathode having a metal-fluoride, wherein the metal is V, Cr, Mn, Fe, Co, Ni, Cu, or a combination thereof;
- and
- an electrolyte composition in contact with the anode and cathode that is capable of becoming molten, the electrolyte composition comprising a tertiary electrolyte being LiF—LiCl—Li2SO4 that is capable of becoming molten when above a melting point of 350° C.,
- wherein the LiF ranges from 25% to 50%, the LiCl ranges from 30% to 55%, and the Li2SO4 ranges from 15% to 45%.
A thermal battery comprising:
- an anode having a lithium alloy of lithium silicon or lithium aluminum;
- a cathode having a metal-fluoride and an electrically conductive material associated with the metal-fluoride, wherein the metal of the metal-fluoride is nickel;
- and
- an electrolyte composition in contact with the anode and cathode that is capable of becoming molten, the electrolyte composition including an electrolyte consisting of LiF—LiCl—Li2SO4 that is capable of becoming molten when above a melting point of 350° C.,
- wherein the thermal battery is configured to provide a discharge voltage of at least 2.2 V at 100 mA/cm2,
- wherein the LiF ranges from 25% to 50%, the LiCl ranges from 30% to 55%, and the Li2SO4 ranges from 15% to 45%.
Dependencies are inferred from the claim text.