Metallic textiles for flexible wearable lithium ion batteries

Patent metadata

Field	Value
Publication number	US-11374228-B2
Application number	US-201716609253-A
Country	US
Kind code	B2
Filing date	Dec 14, 2017
Priority date	Dec 14, 2017
Publication date	Jun 28, 2022
Grant date	Jun 28, 2022

Abstract

This disclosure provides a method for preparing a current collector. The method includes: (1) anchoring vinyl groups onto the surface of textiles through the silanization between hydroxyl groups and coupling agents; (2) synthesizing polyelectrolyte brushes through in-situ radical polymerization; and (3) obtaining catalyst ions on the polyelectrolyte brushes through ion-exchange and obtaining metal-coated layers through subsequent electroless deposition). The current collector according to the present disclosure has high electrical conductivity and excellent mechanical flexibility, and thus the lithium ion battery including the same is suitable for portable and wearable electronic devices.

First claim

What is claimed is:

1. A method for preparing a current collector, comprising:
(1) anchoring vinyl groups onto the surface of a textile through the silanization of the hydroxyl groups on the surface of the textile with a coupling agent, wherein the coupling agent is γ-methacryloxypropyltrimethoxysilane;
(2) synthesizing polyelectrolyte brushes on the surface of the textile through in-situ radical polymerization;
(3) forming catalyst ions on the polyelectrolyte brushes through ion-exchange and forming a metal-coated layer through subsequent electroless deposition.

2. The method according to claim 1 , wherein the catalyst ions are PdCl 4 2− .

3. The method according to claim 1 , wherein the metal-coated layer is a copper-coated layer or a nickel-coated layer.

4. The method according to claim 1 , wherein the textile is formed from at least one of cotton and polyester.

5. A current collector, being prepared by the method according to claim 1 .

6. The current collector according to claim 5 , wherein the current collector has a sheet resistance of less than 0.25 ohms/square.

7. A lithium ion battery, comprising the current collector according to claim 5 .

8. The lithium ion battery according to claim 7 , wherein an anode material contains Li 4 Ti 5 O 12 .

9. The lithium ion battery according to claim 7 , wherein a cathode material contains LiFePO 4 .

10. The current collector according to claim 5 , wherein the catalyst ions are PdCl 4 2− .

11. The current collector according to claim 5 , wherein the metal-coated layer is a copper-coated layer or a nickel-coated layer.

12. The current collector according to claim 5 , wherein the textile is formed from at least one of cotton and polyester.

13. The lithium ion battery according to claim 7 , wherein the current collector has a sheet resistance of less than 0.25 ohms/square.

Assignees

• Hong Kong Res Inst Textiles & Apparel Ltd

Inventors

• Zheng Zijian
• Wang Dongrui

Classifications

• H01M10/0525 Primary

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• H01M4/661

  Metal or alloys, e.g. alloy coatings (H01M4/669 take precedence) · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• D06M14/04

  of vegetal origin, e.g. cellulose or derivatives thereof · CPC title