High energy materials for a battery and methods for making and use
View Patent ↗A composition for forming an electrode. The composition includes a metal fluoride, such as copper fluoride, and a matrix material. The matrix material adds capacity to the electrode. The copper fluoride compound is characterized by a first voltage range in which the copper fluoride compound is electrochemically active and the matrix material characterized by a second voltage range in which the matrix material is electrochemically active and substantially stable. A method for forming the composition is included.
1. A composition for forming a cathode for use in a battery, comprising:
a copper fluoride compound characterized by a first voltage range in which the copper fluoride compound is electrochemically active; and
a matrix material comprising a lithium, nickel, manganese, cobalt and oxygen containing compound or an LiFePO 4 compound;
wherein the matrix material is characterized by a second voltage range in which the matrix material is electrochemically active; and wherein the second voltage range overlaps at least 35% of the first voltage range.
2. The composition of claim 1 wherein the second voltage range overlaps at least 40% of the first voltage range.
3. The composition of claim 1 wherein the second voltage range overlaps at least 45% of the first voltage range.
4. The composition of claim 1 wherein the second voltage range overlaps at least 50% of the first voltage range.
5. The composition of claim 1 wherein the matrix material comprises an NMC material.
6. The composition of claim 1 wherein the matrix material adds specific capacity to the composition as compared to a composition without the matrix material.
7. A cathode formed using the compositions of claim 1 .
8. The cathode of claim 7 wherein the cathode is a composite cathode.
9. The composition of claim 1 further comprising a phase comprising elements of the copper fluoride material and elements of the matrix material wherein the phase is formed by an annealing step.
10. The composition of claim 1 wherein the matrix material comprises a lithium, nickel, manganese, cobalt and oxygen containing compound.
11. The composition of claim 1 wherein the matrix material comprises LiNi 0.33 Mn 0.33 Co 0.33 O 2 .
12. The composition of claim 1 wherein the matrix material comprises a lithium, nickel, manganese, cobalt and oxygen containing compound.
13. A method of making a composition for use in a cathode for a battery, comprising:
mixing a copper fluoride compound characterized by a first voltage range in which the copper fluoride compound is electrochemically active with a matrix material comprising a lithium, nickel, manganese, cobalt and oxygen containing compound and characterized by a second voltage range in which the matrix material is electrochemically active, wherein the second voltage range overlaps at least 35% of the first voltage range; and
annealing the mixture.
14. The method of claim 13 wherein the second voltage range overlaps at least 40% of the first voltage range.
15. The method of claim 13 wherein the second voltage range overlaps at least 45% of the first voltage range.
16. The method of claim 13 wherein the second voltage range overlaps at least 50% of the first voltage range.
17. The method of claim 13 wherein the matrix material comprises an NMC material.
18. The method of claim 13 wherein the annealing step forms a phase comprising elements of the copper fluoride material and elements of the matrix material.
19. The method of claim 13 wherein the matrix material comprises LiNi 0.33 Mn 0.33 Co 0.33 O 2 .