Magnesium-containing electrode, method for fabricating the same, and electrochemical device

Patent metadata

Field	Value
Publication number	US-12230785-B2
Application number	US-202117505261-A
Country	US
Kind code	B2
Filing date	Oct 19, 2021
Priority date	Apr 19, 2019
Publication date	Feb 18, 2025
Grant date	Feb 18, 2025

Abstract

Provided is a method for fabricating a magnesium-containing electrode by a plating method. In the fabrication process disclosure, a plating solution used in the plating method includes a solvent containing an ether. The solvent includes a first magnesium salt having a disilazide structure represented by a formula (R 3 Si) 2 N and a second magnesium salt that does not have a disilazide structure. In the formula, R represents a hydrocarbon group having 1 or more and 10 or less carbon atoms.

First claim

The invention claimed is:

1. A method for fabricating a magnesium-containing electrode for an electrochemical device, comprising:
fabricating the magnesium-containing electrode by a plating method, wherein
a plating solution used in the plating method includes a solvent containing an ether, and
the solvent includes a first magnesium salt having a disilazide structure represented by a formula (R3Si)2N, and a second magnesium salt that does not have the disilazide structure,
wherein R represents a hydrocarbon group having 1 or more and 10 or less carbon atoms, and wherein the second magnesium salt includes at least two kinds of salts.

2. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the two kinds of the second magnesium salts include a metal halide salt and a metal imide salt.

3. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the R in the disilazide structure represents an aliphatic hydrocarbon group having 1 or more and 10 or less carbon atoms.

4. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the R in the disilazide structure represents a lower alkyl group having 1 or more and 4 or less carbon atoms.

5. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the first magnesium salt includes magnesium bis(hexamethyldisilazide).

6. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 2 , wherein the metal halide salt includes magnesium chloride.

7. The method for fabricating a magnesium electrode-containing for an electrochemical device according to claim 2 , wherein the metal imide salt includes a magnesium salt of perfluoroalkylsulfonylimide.

8. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the two kinds of the second magnesium salts include magnesium chloride and magnesium bis(trifluoromethanesulfonyl)imide.

9. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the ether includes a linear ether.

10. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 9 , wherein the linear ether is represented by following formula:

wherein R′ and R″ each independently represent a hydrocarbon group having 1 or more and 10 or less carbon atoms, and n is an integer of 1 or more and 10 or less.

11. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 10 , wherein the R′ and the R″ each independently represent a lower alkyl group having 1 or more and 4 or less carbon atoms.

12. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein magnesium is precipitated on a metal material to form a magnesium foil on the metal material and the magnesium-containing electrode includes the metal material and the magnesium foil.

13. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein a granular precipitate is obtained as a magnesium precipitate in the plating method.

14. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 13 , wherein the granular precipitate has a geometric shape.

15. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the plating method is electroless plating.

16. The method for fabricating a magnesium-containing electrode for an electrochemical device according to claim 1 , wherein the electrochemical device is a magnesium secondary battery.

Assignees

• Murata Manufacturing Co

Inventors

• Matsumoto Ryuhei
• Nakayama Yuri
• Kawasaki Hideki

Classifications

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title

• H01M2004/027

  Negative electrodes · CPC title

• H01M10/054

  Accumulators with insertion or intercalation of metals other than lithium, e.g. with magnesium or aluminium · CPC title

• H01M4/1395

  of electrodes based on metals, Si or alloys · CPC title

• H01M4/0452

  from solutions · CPC title