Electrodes for batteries

Patent metadata

Field	Value
Publication number	US-11309535-B2
Application number	US-201816023176-A
Country	US
Kind code	B2
Filing date	Jun 29, 2018
Priority date	Dec 18, 2017
Publication date	Apr 19, 2022
Grant date	Apr 19, 2022

Abstract

Provided herein are a lithium electrode and a sulfur electrode for batteries. The lithium electrode comprises lithium metal and a metal-coated fabric. The fibers of the metal-coated fabric are covered by a metal layer, on which the lithium metal is attached. The sulfur electrode comprises a sulfur composite and a nickel-coated fabric. The fibers of the nickel-coated fabric are covered by a nickel layer, on which the sulfur composite is attached. The lithium electrode can inhibit dendrite formation and the sulfur electrode can speed up the redox kinetics of soluble polysulfides.

First claim

What is claimed is:

1. An electrode for a battery comprising:
lithium metal; and
a metal-coated carbon fabric having a three-dimensional porous structure and comprising carbon fibers, a copper layer, and an interfacial polymer layer sandwiched between the carbon fibers and the copper layer, the interfacial polymer layer being an interfacial poly[2-(methacryloyloxy) ethyl]trimethyl ammonium chloride (PMETAC) layer for bonding the copper layer to each of the carbon fibers thereby forming the metal-coated carbon fabric;
wherein each of the carbon fibers comprises a diameter in a range of 5 μm to 20 μm,
wherein the copper layer comprises copper nanoparticles for enhancing affinity to the lithium metal and confining deposit of the lithium metal, the copper nanoparticles fully covering a surface of the metal-coated carbon fabric;
wherein the lithium metal is attached to the copper layer;
wherein a portion of the lithium metal has a two-dimensional nanostructure and is in a form of a flake; and
wherein the flake has a lateral dimension in a range of 1 μm to 5 μm and a thickness in a range of 1-100 nm.

2. The electrode of claim 1 , wherein the copper layer has a thickness in a range of 50 nm to 300 nm.

3. The electrode of claim 1 , wherein the lithium metal is further present in pores in the carbon fabric.

4. A lithium metal sulfur battery comprising an anode and a cathode,
the anode comprising the electrode of claim 1 ; and
the cathode comprising:
a sulfur composite comprising a conductive binder and sulfur; and
a further carbon fabric comprising further carbon fibers, the further carbon fibers being at least partially covered by a nickel layer, wherein the sulfur composite is attached to the nickel layer.

5. The lithium metal sulfur battery of claim 4 , wherein the conductive binder is a nitrogen and sulfur co-doped graphene; and the sulfur composite further comprises carbon black.

Assignees

• Univ Hong Kong Polytechnic

Inventors

• Zheng Zijian
• Chang Jian

Classifications

• H01M4/747

  Woven material · CPC title

• H01M4/66

  Selection of materials · CPC title

• H01M4/134 Primary

  Electrodes based on metals, Si or alloys · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M4/5815

  Sulfides · CPC title