High energy density and high rate Li battery

Patent metadata

Field	Value
Publication number	US-9985294-B2
Application number	US-201514725309-A
Country	US
Kind code	B2
Filing date	May 29, 2015
Priority date	May 29, 2015
Publication date	May 29, 2018
Grant date	May 29, 2018

Abstract

A battery includes an anode, an electrolyte, and a cathode. The cathode includes a current collector having a first surface and a second surface opposite the first surface, a first material layer comprising sub-fluorinated carbon fluoride (CF x ), and a second material layer comprising silver vanadium oxide (SVO) bonded to the first material layer. The first material layer comprising CF x may also be bonded to a third material layer comprising SVO, and the third material layer is bonded to the first surface of the current collector.

First claim

What is claimed is:

1. A battery comprising:
an anode;
an electrolyte; and
a cathode comprising:
a current collector having a first surface and a second surface opposite the first surface;
a composite including a plurality of material layers, each material layer having a pair of major surfaces separated by a thickness, the composite being oriented with the major surfaces of each of the material layers perpendicular to the first surface of the current collector, the plurality of material layers including:
a first material layer comprising sub-fluorinated carbon fluoride having a chemical formula (CF x ), and
a second material layer comprising silver vanadium oxide (SVO) bonded to one of the major surfaces of the first material layer; and

a third material layer comprising silver vanadium oxide (SVO), the third material layer having a pair of major surfaces separated by a thickness, the third material layer being positioned so that one of the major surfaces of the third material layer confronts the first surface of the current collector and another of the major surfaces of the third material layer confronts the first and second material layers.

2. The battery of claim 1 , wherein the cathode further comprises a fourth material layer comprising sub-fluorinated carbon fluoride having the chemical formula (CF x ) bonded to the second surface of the current collector, and a fifth material layer comprising silver vanadium oxide (SVO) bonded to the fourth material layer.

3. The battery of claim 1 , wherein the current collector has a mesh structure, and the first surface and the second surface of the current collector are opposite surfaces of the mesh structure.

4. The battery of claim 1 , wherein x in the chemical formula (CF x ) is between 0.6 and 1.2.

5. The battery of claim 1 , wherein the first material layer further comprises an additive chosen from the group consisting of: carbon nanotubes, graphene, and metal nanoparticles.

6. The battery of claim 1 , wherein the first material layer further comprises between 1% and 20% by weight of silver nanoparticles or aluminum nanoparticles based on a weight of the first material layer.

7. The battery of claim 1 , wherein the thickness of the second material layer is about one third the thickness of the first material layer.

8. A cathode within a battery, the cathode comprising:
a current collector having a first surface and a second surface opposite the first surface;
a composite including a plurality of material layers, each material layer having a pair of major surfaces separated by a thickness, the composite being oriented with the major surfaces of each of the material layers perpendicular to the first surface of the current collector, the plurality of material layers including:
a first material layer comprising sub-fluorinated carbon fluoride having a chemical formula (CF x ), and
a second material layer comprising silver vanadium oxide (SVO) bonded to one of the major surfaces of the first material layer; and

a third material layer comprising silver vanadium oxide (SVO), the third material layer having a pair of major surfaces separated by a thickness, the third material layer being positioned so that one of the major surfaces of the third material layer confronts the first surface of the current collector and another of the major surfaces of the third material layer confronts the first and second material layers.

9. The cathode of claim 8 , further comprising a fourth material layer comprising sub-fluorinated carbon fluoride having the chemical formula (CF x ) bonded to the second surface of the current collector, and a fifth material layer comprising silver vanadium oxide (SVO) bonded to the fourth material layer.

10. The cathode of claim 8 , wherein the current collector includes a mesh, and the first surface and the second surface of the current collector are opposite surfaces of the mesh.

11. The cathode of claim 8 , wherein x in the chemical formula (CF x ) is between 0.6 and 1.2.

12. The cathode of claim 8 , wherein the first material layer comprises an additive chosen from the group consisting of: carbon nanotubes, graphene, and metal nanoparticles.

13. The cathode of claim 8 , wherein the first material layer comprises between 1% and 20% by weight of silver nanoparticles or aluminum nanoparticles based on a weight of the first material layer.

14. The cathode of claim 8 , wherein the thickness of the second material layer is about one third the thickness of the first material layer.

15. A cathode within a battery, the cathode comprising:
a current collector having a first surface and a second surface opposite the first surface;
a first material layer comprising sub-fluorinated carbon fluoride having a chemical formula (CF x , the first material layer having first and second major surfaces separated by a thickness, and a plurality of bores extending through the thickness of the first material layer from the first major surface to the second major surface, the first major surface of the first material layer being bonded to the first surface of the current collector; and
a second material comprising silver vanadium oxide (SVO) that fills the plurality of bores in the first material layer.

16. A method of fabricating an electrode, comprising:
forming a composite by bonding a first material layer comprising sub-fluorinated carbon fluoride having a chemical formula (CF x ) to a second material layer comprising silver vanadium oxide (SVO), each of the first material layer and the second material layer having a pair of major surfaces separated by a thickness, the second material layer being bonded to one of the major surfaces of the first material layer;
bonding a third material layer comprising silver vanadium oxide (SVO) to a surface of a current collector, the third material layer having first and second major surfaces separated by a thickness, the third material layer being bonded so that the first major surface of the third material layer confronts the surface of the current collector; and
bonding the composite to the third material layer so that the second major surface of the third material layer is in contact with the composite and the major surfaces of the first and second material layers are perpendicular to the surface of the current collector.

17. The method of claim 16 , wherein the forming step comprises:
casting the second material layer on a substrate;
casting the first material layer over the second material layer to form the composite; and
removing the composite from the substrate.

18. The method of claim 16 , wherein the forming step comprises:
casting the first material layer on a substrate;
casting the second material layer over the first material layer to form the composite; and
removing the composite from the substrate.

19. The method of claim 16 , wherein the forming step comprises:
dipping the first material layer in a slurry comprising SVO such that at least one of the major surfaces of the first material layer is coated with the slurry; and
drying the slurry coated first material layer to form the second material layer bonded to the one major surface of the first material layer.

20. The method of claim 16 , further comprising forming the first material layer, wherein the step of forming the first material layer includes mixing carbon nanotubes, graphene, or metal nanoparticles with the sub-fluorinated carbon fluoride.

Assignees

• Pacesetter Inc

Inventors

• Jiang Xiaofei

Classifications

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M4/54

  of silver · CPC title

• H01M4/133

  Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx · CPC title

• H01M4/66 Primary

  Selection of materials · CPC title

• H01M4/0485

  Casting · CPC title