High energy density and high rate li battery

Patent metadata

Field	Value
Publication number	US-2016351897-A1
Application number	US-201514725309-A
Country	US
Kind code	A1
Filing date	May 29, 2015
Priority date	May 29, 2015
Publication date	Dec 1, 2016
Grant date	—

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 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.

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

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

8 . The battery of claim 1 , wherein the second material layer is bonded to a face of the first material layer that is perpendicular to the first surface of the current collector.

9 . The battery of claim 1 , wherein the cathode further comprises a third material layer comprising silver vanadium oxide (SVO) and having a first surface bonded to the first surface of the current collector, wherein the first material layer is bonded to a second surface of the third material layer opposite the first surface of the third material layer.

10 . 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 (CF x ); and a second material layer comprising silver vanadium oxide (SVO) bonded to the first material layer.

11 . The cathode of claim 10 , wherein the first material layer is bonded to the first surface of the current collector, and further comprising a third material layer comprising sub-fluorinated carbon fluoride (CF x ) bonded to the second surface of the current collector, and a fourth material layer comprising silver vanadium oxide (SVO) bonded to the third material layer.

12 . The cathode of claim 10 , 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.

13 . The cathode of claim 10 , wherein x of the sub-fluorinated carbon fluoride (CF x ) is between 0.6 and 1.2.

14 . The cathode of claim 10 , wherein the first material layer comprises an additive chosen from the group consisting of: carbon nanotubes, graphene, and metal nanoparticles.

15 . The cathode of claim 10 , wherein the first material layer comprises between 1% and 20% by weight of silver nanoparticles or aluminum nanoparticles.

16 . The cathode of claim 10 , wherein a thickness of the second material layer is about one third a thickness of the first material layer.

17 . The cathode of claim 10 , wherein the second material layer is bonded to a face of the first material layer that is perpendicular to the first surface of the current collector.

18 . The cathode of claim 10 , further comprising a third material layer comprising silver vanadium oxide (SVO) and having a first surface bonded to the first surface of the current collector, wherein the first material layer is bonded to a second surface of the third material layer opposite the first surface of the third material layer.

19 . 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 (CF x ) bonded to the first surface of the current collector; and a second material comprising silver vanadium oxide (SVO) that fills a plurality of bores that extend through a thickness of the first material layer.

20 . A method of fabricating an electrode, comprising:
bonding a first material layer comprising sub-fluorinated carbon fluoride (CF x ) to a second material layer comprising silver vanadium oxide (SVO) to form a composite; and bonding the composite to a current collector such that a surface of the current collector is in contact with the first material layer.

21 . The method of claim 20 , wherein the first bonding step comprises:
casting the second material layer on a substrate; casting the first material layer over the second material layer; and removing the composite from the substrate.

22 . The method of claim 20 , wherein the first bonding step comprises:
casting the first material layer on a substrate; casting the second material layer over the first material layer; and removing the composite from the substrate.

23 . The method of claim 20 , wherein the first bonding step comprises:
dipping the first material layer in a slurry comprising SVO, such that a surface 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 surface of the first material layer.

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

25 . The method of claim 20 , wherein the second bonding step further comprises bonding the composite to the current collector such that a bond interface between the first material layer and the second material layer is perpendicular to the surface of the current collector.

Assignees

• Pacesetter Inc

Inventors

• Jiang Xiaofei

Classifications

• H01M4/5835

  Comprising fluorine or fluoride salts · CPC title

• H01M6/14

  Cells with non-aqueous electrolyte · CPC title

• H01M2004/028

  Positive electrodes · CPC title

• H01M4/366 Primary

  as layered products · CPC title

• H01M4/54

  of silver · CPC title