Electrode for battery and fabrication method thereof

Patent metadata

Field	Value
Publication number	US-11211606-B2
Application number	US-201816121686-A
Country	US
Kind code	B2
Filing date	Sep 5, 2018
Priority date	Dec 28, 2017
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

An electrode for a battery, comprising an active material and a metallic fabric is disclosed. The metallic fabric comprises fibers being at least partially covered by a coating of nickel or copper, which comprises a layer and a plurality of protrusions protruding from the layer. The active material is attached on the protrusions. The metallic fabric provides a high electrical conductivity and a high mechanical stability, and demonstrates outstanding performance for the use as a current collector of battery.

First claim

What is claimed is:

1. An electrode for a battery comprising:
an active material; and
a fabric comprising one or more fibers, each fiber covered by a copper coating thereby forming a foldable metallic fabric, the copper coating comprising a copper layer and a plurality of copper protrusions protruding from the copper layer such that each copper protrusion has a root formed on the copper layer;
wherein the active material is attached to at least some of the plurality of copper protrusions; and
wherein respective roots of the plurality of copper protrusions evenly cover all fiber surface of each fiber.

2. The electrode of claim 1 , wherein each copper protrusion has a height in a range of 100 nm to 5 μm.

3. The electrode of claim 1 , wherein each copper protrusion has a width in a range of 10 nm to 1 μm.

4. The electrode of claim 1 , wherein the copper layer has a thickness in a range of 100 nm to 1 μm.

5. The electrode of claim 1 , wherein each copper protrusion has a height in a range of 100 nm to 5 μm and a width in a range of 10 nm to 1 μm; and the copper layer has a thickness in a range of 100 nm to 1 μm.

6. The electrode of claim 1 , wherein the active material is sulfur, silicon, lithium metal, lithium titanate, lithium iron phosphate, lithium cobalt oxide or lithium manganite.

7. A battery comprising the electrode of claim 1 .

8. The battery of claim 7 , wherein the active material is lithium titanate; each copper protrusion has a height in a range of 100 nm to 5 μm and a width in a range of 10 nm to 1 μm; and the copper layer has a thickness in a range of 100 nm to 1 μm.

Assignees

• Univ Hong Kong Polytechnic

Inventors

• Zheng Zijian
• Wang Dongrui

Classifications

• C25D3/58

  containing more than 50% by weight of copper · CPC title

• C23C18/30

  Activating {or accelerating or sensitising with palladium or other noble metal} · CPC title

• H01M4/485

  of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy (H01M4/505, H01M4/525 take precedence) · CPC title

• H01M4/0404

  by coating on electrode collectors · CPC title

• H01M4/136

  Electrodes based on inorganic compounds other than oxides or hydroxides, e.g. sulfides, selenides, tellurides, halogenides or LiCoFy · CPC title