Supporter of lithium metal and methods thereof

Patent metadata

Field	Value
Publication number	US-12230792-B2
Application number	US-202117340478-A
Country	US
Kind code	B2
Filing date	Jun 7, 2021
Priority date	Dec 5, 2018
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

A supporter of lithium metal, a material of the supporter of lithium metal is at least one of copper, an alloy of the copper, nickel, or an alloy of the nickel, and a surface of the supporter of lithium metal comprises a lithiophilic surface.

First claim

What is claimed is:

1. A supporter of lithium metal, wherein:
a material of the supporter of lithium metal is at least one of copper, an alloy of the copper, nickel, or an alloy of the nickel,
a surface of the supporter of lithium metal defines a lithiophilic surface,
the lithiophilic surface has a mainly Cu(100) orientation or a mainly Ni(100) orientation, and
when cyclic voltammograms of the supporter of lithium metal are detected in a Pb(ClO 4 ) 2 aqueous solution:
an area of an underpotential deposition peak of the supporter of lithium metal located at −0.39 V is greater than an area of an underpotential deposition peak of the supporter of lithium metal located at −0.35 V to obtain the mainly Cu(100) orientation or the mainly Ni(100) orientation, wherein the area of the underpotential deposition peak of the supporter of lithium metal located at −0.35 V is larger than 0.

2. The supporter of lithium metal according to claim 1 , wherein a configuration of the supporter of lithium metal comprises at least one of a flat foil, a three-dimensional mesh, a three-dimensional foam, or a three-dimensional cylinder.

3. A method for preparing a supporter of lithium metal, wherein:
a material of the supporter of lithium metal is at least one of copper, an alloy of the copper, nickel, or an alloy of the nickel,
a surface of the supporter of lithium metal defines a lithiophilic surface, and
the method comprises:
1) putting a supporter into an electrochemical cell functioning as a working electrode, injecting an electropolishing solution, and applying anodic potential or anodic current to the working electrode to enable a metal to be stripped from the working electrode, wherein the anodic potential is 1-2 V, the anodic current is 100-300 mA/cm 2 , and a reaction time is 15-60 seconds; and
2) injecting an electrolyte comprising a crystal face capping agent into the electrochemical cell after step 1) is complete, applying cathodic potential or cathodic current to the working electrode to enable the metal to be deposited.

4. The method according to claim 3 , wherein in step 1), a material of the supporter is at least one of the copper, the alloy of the copper, the nickel, or the alloy of the nickel.

5. The method according to claim 3 , wherein the crystal face capping agent comprises at least one of potassium chloride, sodium chloride, hydrochloric acid, sodium sulfate, potassium sulfate, sulfuric acid, polyvinylpyrrolidone, or cetyltrimethylammonium chloride.

6. The method according to claim 3 , wherein:
in step 2), the cathodic potential is −0.2 to −0.05 V,
the cathodic current is −0.1 to −0.05 mA/cm 2 , and
a reaction time is 10-60 minutes.

7. A method comprising:
applying the supporter of lithium metal according to claim 1 to function as a lithium-free anode in a lithium-ion battery, or
applying the supporter of lithium metal in a lithium thin film anode of a secondary battery by electrodeposition or a molten lithium covering method.

8. The method according to claim 7 , wherein:
the secondary battery comprises one of the lithium-ion battery, a lithium-sulfur battery, or a lithium-oxygen battery.

9. A method for preparing a supporter of lithium metal, wherein:
a material of the supporter of lithium metal is at least one of copper, an alloy of the copper, nickel, or an alloy of the nickel,
a surface of the supporter of lithium metal defines a lithiophilic surface, and
the method comprises:
1) putting a supporter into an electrochemical cell functioning as a working electrode, injecting an electropolishing solution, and applying anodic potential or anodic current to the working electrode to enable a metal to be stripped from the working electrode; and
2) injecting an electrolyte comprising a crystal face capping agent into the electrochemical cell after step 1) is complete, applying cathodic potential or cathodic current to the working electrode to enable the metal to be deposited, wherein the cathodic potential is −0.2 to −0.05 V, the cathodic current is −0.1 to −0.05 mA/cm 2 , and a reaction time is 10-60 minutes.

10. The method according to claim 9 , wherein in step 1), a material of the supporter is at least one of the copper, the alloy of the copper, the nickel, or the alloy of the nickel.

11. The method according to claim 9 , wherein the crystal face capping agent comprises at least one of potassium chloride, sodium chloride, hydrochloric acid, sodium sulfate, potassium sulfate, sulfuric acid, polyvinylpyrrolidone, or cetyltrimethylammonium chloride.

Assignees

• Univ Xiamen

Inventors

• Mao Bingwei
• GU Yu
• Xu Hongyu
• Wang Weiwei
• Yan Jiawei

Classifications

• H01M10/0525

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

• H01M4/0452

  from solutions · CPC title

• H01M4/0442

  Anodisation, Oxidation (electrolytic coating by anodisation C25D9/00) · CPC title

• C25F3/26 Primary

  of refractory metals · CPC title

• C25D1/00

  Electroforming · CPC title