Electrode structure, method of fabricating the same, and lithium battery

Patent metadata

Field	Value
Publication number	US-2017018766-A1
Application number	US-201615011437-A
Country	US
Kind code	A1
Filing date	Jan 29, 2016
Priority date	Jul 14, 2015
Publication date	Jan 19, 2017
Grant date	—

Abstract

An electrode structure is provided. The electrode structure includes a substrate, a buffer layer, and a nano-material layer. The buffer layer is disposed on the substrate. The nano-material layer is disposed on the buffer layer, wherein the structure of the nano-material layer is nanowall.

First claim

What is claimed is:

1 . An electrode structure, comprising:
a substrate; a buffer layer disposed on the substrate; and a nano-material layer disposed on the buffer layer, wherein a structure of the nano-material layer is nanowall.

2 . The electrode structure of claim 1 , wherein a material of the substrate comprises metal foil, transparent conductive glass, carbon material, silicon, or an organic polymer thin film.

3 . The electrode structure of claim 1 , wherein a material of each of the buffer layer and the nano-material layer comprises a copper-zinc-tin-sulfur compound, and an atomic ratio of sulfur in the buffer layer and an atomic ratio of sulfur in the nano-material layer are different.

4 . The electrode structure of claim 1 , wherein the nano-material layer is hydrophilic.

5 . The electrode structure of claim 1 , wherein a thickness of the buffer layer is 50 nanometers to 300 nanometers, and a thickness of the nano-material layer is 500 nanometers to 4000 nanometers.

6 . A method of fabricating an electrode structure, comprising:
providing a substrate; placing the substrate in a first precursor solution and performing a first heating process to form a buffer layer on the substrate; and placing the substrate in a second precursor solution and performing a second heating process to form a nano-material layer on the buffer layer, wherein a structure of the nano-material layer is nanowall.

7 . The method of claim 6 , wherein the first precursor solution and the second precursor solution each independently comprise a copper salt, a zinc salt, a tin salt, a sulfur-containing substance, and a solvent, the copper salt comprises copper chloride, copper acetate, or copper nitrate, the zinc salt comprises zinc chloride, zinc acetate, or zinc nitrate, the tin salt comprises tin chloride, tin acetate, or tin nitrate, the sulfur-containing substance comprises sulfur powder or thiourea, and the solvent comprises ethanol or water, wherein a mole ratio of the tin salt and the sulfur-containing substance in the first precursor solution and a mole ratio of the tin salt and the sulfur-containing substance in the second precursor solution are different.

8 . The method of claim 7 , wherein a mole ratio of the tin salt and the sulfur-containing substance in the first precursor solution and a mole ratio of the tin salt and the sulfur-containing substance in the second precursor solution are each independently 1:2 to 1:10.

9 . The method of claim 6 , wherein the first heating process and the second heating process are each independently a hydrothermal synthesis process, a process temperature of the first heating process is 100° C. to 250° C., a process time of the first heating process is 10 minutes to 2 hours, a process temperature of the second heating process is 100° C. to 400° C., and a process time of the second heating process is 6 hours to 48 hours.

10 . A lithium battery, comprising:
an anode, comprising the electrode structure of claim 1 ; a cathode separately disposed from the anode; a polymer separator disposed between the anode and the cathode, wherein the polymer separator, the anode, and the cathode define a housing region; an electrolyte solution disposed in the housing region; and a package structure packaging the anode, the cathode, and the electrolyte solution.

Assignees

• Univ Nat Taiwan Science Tech

Inventors

• Tai Yian
• Hwang Bing-Joe
• Chen Kuei-Hsien
• Chiu Jian-Ming
• Chen Li-Chyong

Classifications

• H01M4/0471

  involving thermal treatment, e.g. firing, sintering, backing particulate active material, thermal decomposition, pyrolysis · CPC title

• H01M4/0402

  Methods of deposition of the material · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M4/5815

  Sulfides · CPC title

• H01M10/0525

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