Electrolytes comprising metal amide and metal chlorides for multivalent battery

Patent metadata

Field	Value
Publication number	US-9601801-B2
Application number	US-201414335604-A
Country	US
Kind code	B2
Filing date	Jul 18, 2014
Priority date	Jul 18, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

An electrolyte includes compounds of formula M 1 X n and M 2 Z m ; and a solvent wherein M 1 is Mg, Ca, Sr, Ba, Sc, Ti, Al, or Zn; M 2 is Mg, Ca, Sr, Ba, Sc, Ti, Al, or Zn; X is a group forming a covalent bond with M 1 ; Z is a halogen or pseudo-halogen; n is 1, 2, 3, 4, 5, or 6; and m is 1, 2, 3, 4, 5, or 6.

First claim

What is claimed is:

1. An electrolyte comprising:
Mg p (hexamethyldisilazane) n Cl q wherein p is 3, 5, 7, or 9; n is 2, 4, 6, or 8, and q is 2, 4, 6, or 8; or
Mg(2,6-di-t-butylphenoxide) 2 and MgCl 2 ;
wherein the electrolyte is free of aluminum.

2. The electrolyte of claim 1 further comprising a solvent.

3. The electrolyte of claim 2 , wherein the solvent is tetrahydrofuran, glyme, diglyme, triglyme, tetraglyme, a crown ether, dimethoxyethane, 1,3-dioxane, 1,4-dioxane, acetonitrile, sulfolane, hexane, heptane, octane, nonane, decane, benzene, toluene, propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, tetramethylene sulfone, pentamethyldiethylene tri amine, or hexamethyltriethylene tetramine.

4. The electrolyte of claim 1 comprising
Mg 5 (hexamethyldisilazane) 2 Cl 8 or Mg 3 (hexamethyldisilazane) 4 Cl 2 .

5. The electrolyte of claim 1 which is void of AlCl 3 .

6. The electrolyte of claim 1 comprising the
Mg p (hexamethyldisilazane) n Cl q .

7. A rechargeable battery comprising:
a cathode;
an anode; and
an electrolyte comprising:
Mg p (hexamethyldisilazane) n Cl q or Mg(2,6-di-t-butylphenoxide) 2
wherein:
the electrolyte is free of aluminum;
p is 3, 5, 7, or 9;
n is 2, 4, 6, or 8; and
q is 2, 4, 6, or 8.

8. The battery of claim 7 which is a rechargeable magnesium ion battery.

9. The battery of claim 7 , wherein the electrolyte further comprises a solvent.

10. The battery of claim 9 , wherein the solvent is tetrahydrofuran, glyme, diglyme, triglyme, tetraglyme, a crown ether, dimethoxyethane, 1,3-dioxane, 1,4-dioxane, acetonitrile, sulfolane, hexane, heptane, octane, nonane, decane, benzene, toluene, propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, tetramethylene sulfone, pentamethyldiethylene triamine, or hexamethyltriethylene tetramine.

11. The battery of claim 7 , wherein the electrolyte is void of AlCl 3 .

12. A process for preparing an electroly, the process comprising:
contacting Mg(hexamethyldisilazane) 2 and MgCl 2 in a solvent;
wherein:
the electrolyte comprises Mg p (hexamethyldisilazane) n Cl q wherein p is 3, 5, 7, or 9; n is 2, 4, 6, or 8, and q is 2, 4, 6, or 8; and
the electrolyte is free of aluminum.

13. The process of claim 12 , wherein the solvent comprises tetrahydrofuran, glyme, diglyme, triglyme, tetraglyme, a crown ether, dimethoxyethane, 1,3-dioxane, 1,4-dioxane, acetonitrile, sulfolane, hexane, heptane, octane, nonane, decane, benzene, toluene, propylene carbonate, ethylene carbonate, dimethyl carbonate, diethyl carbonate, tetramethylene sulfone, pentamethyldiethylene triamine, or hexamethyltriethylene tetramine.

14. An electrolyte comprising Mg(2,6-di-t-butylphenoxide) 2 and MgCl 2 .

Assignees

• Uchicago Argonne Llc

Inventors

• Liao Chen
• Zhang Zhengcheng
• Burrell Anthony
• Vaughey John T

Classifications

• H01M4/5815

  Sulfides · CPC title

• H01M2300/0025

  Organic electrolyte · 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

• H01M10/054 Primary

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

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title