Electrode current collector design in a battery

Patent metadata

Field	Value
Publication number	US-2018040902-A1
Application number	US-201715649270-A
Country	US
Kind code	A1
Filing date	Jul 13, 2017
Priority date	Aug 4, 2016
Publication date	Feb 8, 2018
Grant date	—

Abstract

A battery includes an anode, an electrolyte, and a cathode. The cathode includes a current collector formed from a mesh structure with an opening pattern. The opening pattern does not include any angles less than 90 degrees, and the current collector has a first surface and a second surface opposite the first surface. The cathode also includes a first material layer bonded to the first surface of the current collector, and a second material layer bonded to the second surface of the current collector and to the first material layer through the current collector.

First claim

What is claimed is:

1 . An energy storage device comprising:
an anode; an electrolyte; and a cathode, comprising:
a current collector formed from a mesh structure with an opening pattern, wherein the opening pattern does not include any angles less than 90 degrees, the mesh structure having a first surface and a second surface opposite the first surface,
a first material layer bonded to the first surface of the current collector, and
a second material layer bonded to the second surface of the current collector and to the first material layer through the current collector.

2 . The energy storage device of claim 1 , wherein the anode comprises lithium.

3 . The energy storage device of claim 1 , wherein the opening pattern comprises at least 57% of the surface area of the current collector.

4 . The energy storage device of claim 1 , wherein the opening pattern comprises at least 65% of the surface area of the current collector.

5 . The energy storage device of claim 1 , wherein the opening pattern comprises at least 70% of the surface area of the current collector.

6 . The energy storage device of claim 1 , wherein the current collector is formed from titanium, stainless steel, or aluminum, and includes a conductive carbon coating.

7 . The energy storage device of claim 1 , wherein the current collector has a thickness of about 0.003 inches.

8 . The energy storage device of claim 1 , wherein the opening pattern comprises a repeating hexagonal pattern.

9 . The energy storage device of claim 1 , wherein the first material layer and the second material layer are the same material.

10 . The energy storage device of claim 1 , wherein the first material layer and the second material layer each comprises a polytetrafluoroethylene (PTFE) binder with particles of silver vanadium oxide.

11 . The energy storage device of claim 1 , further comprising a housing that encases the anode, the electrolyte, and the cathode.

12 . An battery electrode comprising:
a current collector formed from a mesh structure with an opening pattern, wherein the opening pattern does not include any angles less than 90 degrees, the mesh having a first surface and a second surface opposite the first surface; a first material layer bonded to the first surface of the current collector; and a second material layer bonded to the second surface of the current collector and to the first material layer through the current collector.

13 . The electrode of claim 12 , wherein the opening pattern comprises at least 57% of the surface area of the current collector.

14 . The electrode of claim 12 , wherein the opening pattern comprises at least 65% of the surface area of the current collector.

15 . The electrode of claim 12 , wherein the opening pattern comprises at least 70% of the surface area of the current collector.

16 . The electrode of claim 12 , wherein the current collector is titanium, stainless steel, or aluminum, and includes a conductive carbon coating.

17 . The electrode of claim 12 , wherein the current collector has a thickness of about 0.003 inches.

18 . The electrode of claim 12 , wherein the opening pattern comprises a repeating hexagonal pattern.

19 . The electrode of claim 12 , wherein the first material layer and the second material layer are the same material.

20 . The electrode of claim 12 , wherein the first material layer and the second material layer each comprises a polytetrafluoroethylene (PTFE) binder with particles of silver vanadium oxide.

Assignees

• Pacesetter Inc

Inventors

• Jiang Xiaofei
• Bruch Russell

Classifications

• H01M4/742

  perforated material · CPC title

• H01M4/623

  fluorinated polymers · CPC title

• H01M4/74 Primary

  Meshes or woven material; Expanded metal · CPC title

• H01M2300/0065

  Solid electrolytes · CPC title

• H01M4/667

  in the form of layers, e.g. coatings · CPC title