Low resistance cathode for solid-state battery
A cathode is provided that includes a lithium-ion conductive material, at least one carbon support structure at least partially embedded within the lithium-ion conductive material, and cathode active material particles. The cathode active material particles are provided within and on a surface of each of the at least one carbon support structure. A solid-state battery is also provided that includes the cathode in which cathode active materials are provided within and on a surface of each of the at least one carbon support structure, and the at least one carbon support structure is at least partially embedded within the lithium-ion conductive material.
1. A cathode comprising:
a lithium-ion conductive material;
at least one carbon support structure at least partially embedded within the lithium-ion conductive material; and
cathode active material particles provided within and on a surface of each of the at least one carbon support structure,
the at least one carbon support structure including voids having a size of 15 nm to 5 μm containing the cathode active material particles.
2. The cathode according to claim 1 , further comprising
a current collector provided on the lithium-ion conductive material.
3. The cathode according to claim 1 , further comprising
a binder provided within at least one of the at least one carbon support structure and the lithium-ion conductive material.
4. The cathode according to claim 1 , wherein
the lithium-ion conductive material is a solid electrolyte material.
5. The cathode according to claim 1 , wherein
the at least one carbon support structure is a three-dimensional matrix.
6. The cathode according to claim 1 , wherein
the at least one carbon support structure further includes channels connecting the voids.
7. The cathode according to claim 1 , wherein
the at least one carbon support structure includes a plurality of carbon support structures that are non-uniformly dispersed within the lithium-ion conductive material.
8. The cathode according to claim 1 , wherein
the at least one carbon support structure includes a plurality of carbon support structures that are uniformly spaced apart from each other within the lithium-ion conductive material.
9. The cathode according to claim 1 , wherein
the at least one carbon support structure has a first portion that is narrower than other portions surrounding the first portion such that the lithium-ion conductive material mechanically constricts the at least one carbon support structure.
10. The cathode according to claim 1 , wherein
the at least one carbon support structure has a length ranging from 5 μm to 30 μm.
11. The cathode according to claim 1 , wherein
the cathode comprises at least 80% by weight of the cathode active material.
12. The cathode according to claim 1 , wherein
the cathode comprises 10% by weight to 15% by weight of the lithium-ion conductive material.
13. The cathode according to claim 1 , wherein
the cathode comprises 2% by weight to 5% by weight of the at least one carbon support structure.
14. The cathode according to claim 1 , wherein
the lithium-ion conductive material is a solid electrolyte material that includes a sulfide or an oxide.
15. The cathode according to claim 1 , wherein
the at least one carbon support structure is fully embedded within the lithium-ion conductive material.
16. The cathode according to claim 1 , wherein
the at least one carbon support structure having a diamond shape, a dumbbell shape or an arrow shape.
17. A battery comprising
a cathode;
an anode; and
a lithium-ion conductive solid electrolyte disposed between the cathode and the anode,
the cathode comprising:
a lithium-ion conductive material;
at least one carbon support structure at least partially embedded within the lithium-ion conductive material; and
cathode active material particles provided within and on a surface of each of the at least one carbon support structure,
the at least one carbon support structure including voids having a size of 15 nm to 5 μm containing the cathode active material particles.
18. The battery according to claim 17 , further comprising
a binder provided within at least one of the at least one carbon support structure and the lithium-ion conductive material.
19. The battery according to claim 17 , wherein
the lithium-ion conductive material is the lithium-ion conductive solid electrolyte.
20. The battery according to claim 17 , wherein
the at least one carbon support structure is a three-dimensional matrix.
21. A cathode comprising:
a lithium-ion conductive material;
at least one carbon support structure at least partially embedded within the lithium-ion conductive material; and
cathode active material particles provided within and on a surface of each of the at least one carbon support structure,
the at least one carbon support structure having a length ranging from 5 μm to 30 μm and including voids having a size of 15 nm to 5 μm.