Lithium sulfide cathode material with transition metal coating
View Patent ↗A composition for use in a battery electrode including lithium-sulfur particles coated with a transition metal species bonded to a sulfur species. Methods and materials for preparing such a composition. Use of such a compound in a battery.
1. An electrode for use in a battery comprising:
a particle formed from a lithium-sulfur species; and
a coating covering substantially all of the particle, wherein the coating is a reaction product of a reaction between the particle and a coating compound comprising a transition metal species and a halogen species, wherein the reaction product is the transition metal species bonded to a sulfur species of the lithium-sulfur species.
2. The electrode of claim 1 wherein the coating is formed from the transition metal species reacting with the lithium-sulfur species.
3. The electrode of claim 1 wherein the lithium-sulfur species is Li 2 S.
4. The electrode of claim 1 wherein the electrode acts as a cathode for the battery.
5. The electrode of claim 1 wherein the coating compound is selected from the group consisting of CoF 3 , CrCl 2 , CrCl 3 , CrO 2 Cl 2 , Fe.(acetate), FeCl 2 , FeCl 3 , FeF 2 , FeF 3 , MnF 2 , MnF 3 , MoCl 4 , MoOCl 4 , MoS 2 , NiF 2 , TaCl 5 , TaF 5 , TiCl 3 , TiCl 4 , TiF 4 , TiS 2 , VCl 4 , and VOF 3 .
6. The electrode of claim 1 wherein the coating compound is selected from the group consisting of [Mo(Cp) 2 ].Cl 2 , [Mo(Cp) 2 ].Cl 4 , [Ti(Cp) 2 ].Cl 2 , and [V(Cp) 2 ].Cl 2 .
7. The electrode of claim 1 wherein the coating compound is selected from the group consisting of iron(III).trifluoromethanesulfonate and manganese(III).trifluoromethanesulfonate.
8. The electrode of claim 1 wherein the coating compound is selected from the group consisting of [chromium(III) chloride].tetrahydrofuran and [nickel chloride].dimethoxyethane.
9. A method of making a compound for use in an electrode comprising:
mixing a cathode material, wherein the cathode material comprises a lithium species and a sulfur species, with a coating material, wherein the coating material comprises a transition metal species; and
reacting the coating material with the cathode material to form a coating on the cathode material, wherein the coating comprises the transition metal species bonded to the sulfur species.
10. The method of claim 9 wherein the mixing further comprises adding a solvent.
11. The method of claim 10 further comprising removing excess of the solvent.
12. The method of claim 10 further comprising annealing the coated cathode material.
13. The method of claim 9 wherein the transition metal species further comprises a halogen species.
14. The method of claim 9 wherein the transition metal species further comprises a chalcogen species.
15. The method of claim 9 wherein the transition metal species further comprises a complex of the transition metal and a ligand.
16. The method of claim 9 wherein the transition metal species is selected from the group consisting of CoF 3 , CrCl 2 , CrCl 3 , CrO 2 Cl 2 , Fe.(acetate), FeCl 2 , FeCl 3 , FeF 2 , FeF 3 , MnF 2 , MnF 3 , MoCl 4 , MoOCl 4 , MoS 2 , NiF 2 , TaCl 5 , TaF 5 , TiCl 3 , TiCl 4 , TiF 4 , TiS 2 , VCl 4 , and VOF 3 .
17. The method of claim 9 wherein the transition metal species is selected from the group consisting of [Mo(Cp) 2 ].Cl 2 , [Mo(Cp) 2 ].Cl 4 , [Ti(Cp) 2 ].Cl 2 , and [V(Cp) 2 ].Cl 2 .
18. The method of claim 9 wherein the transition metal species is selected from the group consisting of iron(III).trifluoromethanesulfonate and manganese(III).trifluoromethanesulfonate.
19. The method of claim 9 wherein the transition metal species is selected from the group consisting of [chromium(III) chloride].tetrahydrofuran and [nickel chloride].dimethoxyethane.