Rechargeable Magnesium Oxygen Battery

Patent metadata

Field	Value
Publication number	US-2016285108-A1
Application number	US-201514955484-A
Country	US
Kind code	A1
Filing date	Dec 1, 2015
Priority date	Mar 23, 2015
Publication date	Sep 29, 2016
Grant date	—

Abstract

A rechargeable magnesium oxygen battery, which can be recharged with high efficiency, including a negative electrode, a positive electrode, and an electrolyte catalyst. The negative electrode is configured to release magnesium ions during discharge of the battery, and configured to precipitate elemental magnesium during charging of the battery. The positive electrode is configured to precipitate discharge products that include at least magnesium and oxygen during discharge of the battery, and for releasing magnesium ions during charging of the battery. The electrolyte catalyst is between the negative electrode and the positive electrode. The electrolyte catalyst can be any suitable compound configured to facilitate adsorption of at least one of the electrolyte catalyst and anions thereof on the discharge product.

First claim

What is claimed is:

1 . A rechargeable magnesium oxygen battery comprising:
a negative electrode configured to release magnesium ions during discharge of the battery, and configured to precipitate elemental magnesium during charging of the battery; a positive electrode configured to precipitate discharge product that includes at least magnesium and oxygen during discharge of the battery and for releasing magnesium ions and oxygen during charging of the battery; and a non-aqueous magnesium ion conductor between the negative electrode and the positive electrode; and an electrolyte catalyst included with the non-aqueous magnesium ion conductor, the electrolyte catalyst includes anions; wherein configured to adsorb on the discharge product is the electrolyte catalyst, anions of the electrolyte catalyst, or both the electrolyte catalyst and the anions thereof.

2 . The rechargeable magnesium oxygen battery of claim 1 . wherein the electrolyte catalyst includes anions and adsorbs on the discharge product at greater than the decomposition potential of the discharge product.

3 . The rechargeable magnesium oxygen battery of claim 2 , wherein the decomposition potential of the discharge product is more than 2.5V.

4 . The rechargeable magnesium oxygen battery of claim 1 , wherein:
the discharge product includes MgO x or MgA x B y ; MgOx is one of magnesium oxide (MgO), magnesium peroxide (MgO 2 ), and magnesium superoxide (Mg(O 2 ) 2 ); and A=O and B=Cl, C, or H.

5 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst includes anions and adsorbs on magnesium oxide (MgO) to provide an anion adsorption state on a surface of MgO having an energy of valence that is higher than that of magnesium oxide (MgO).

6 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst includes anions containing halogen and adsorbs on magnesium oxide.

7 . The rechargeable magnesium oxygen battery of claim 6 , wherein the electrolyte catalyst includes anions containing chlorine and adsorbs on magnesium oxide.

8 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst includes organic anions and is configured to adsorb on magnesium oxide.

9 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst includes anions and is configured to adsorb on magnesium peroxide (MgO 2 ) to provide an anion adsorption state on a surface of MgO 2 having an energy of valence that is higher than that of magnesium peroxide (MgO 2 ).

10 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst includes anions containing halogen and is configured to adsorb on magnesium peroxide (MgO 2 ).

11 . The rechargeable magnesium oxygen battery of claim 10 , wherein the electrolyte catalyst includes anions containing chlorine and is configured to adsorb on magnesium peroxide (MgO 2 ).

12 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst includes organic anions and is configured to adsorb on magnesium peroxide (MgO 2 ).

13 . The rechargeable magnesium oxygen battery of claim 1 , wherein the electrolyte catalyst is formed in (PhMgCl) 4 —Al(OPh) 3 in solvent, and “Ph” is a phenyl group.

14 . The rechargeable magnesium oxygen battery of claim 13 , wherein the electrolyte catalyst is adsorbed in a solvent.

15 . The rechargeable magnesium oxygen battery of claim 14 , wherein the solvent includes ether.

16 . A rechargeable magnesium oxygen battery comprising:
a negative electrode configured to release magnesium ions during discharge of the battery, and configured to precipitate elemental magnesium during charging of the battery; a positive electrode configured to precipitate discharge product that includes at least magnesium and oxygen during discharge of the battery and for releasing magnesium ions and oxygen during charging of the battery; and a non-aqueous magnesium on conductor between the negative electrode and the positive electrode; and an electrolyte catalyst included with the non-aqueous magnesium on conductor, the electrolyte catalyst is a magnesium aluminum chloride complex including anions containing chlorine; wherein configured to adsorb on the discharge product is the electrolyte catalyst, anions of the electrolyte catalyst, or both the electrolyte catalyst and the anions thereof.

17 . The rechargeable magnesium oxygen battery of claim 16 , wherein the magnesium aluminum chloride complex includes a chloride ion and is configured to adsorb on magnesium peroxide (MgO 2 ) to provide an anion adsorption state on a surface of MgO 2 by anions having energy of valence that is higher than magnesium peroxide (MgO 2 ).

18 . The rechargeable magnesium oxygen battery of claim 16 , wherein the electrolyte catalyst is formed in (PhMgCl) 4 —Al(OPh) 3 in solvent, and “Ph” is a phenyl group.

19 . The rechargeable magnesium oxygen battery of claim 18 , wherein the electrolyte catalyst is adsorbed in a solvent.

20 . The rechargeable magnesium oxygen battery of claim 19 , wherein the solvent includes ether.

Assignees

• Univ Michigan Regents
• Denso Corp

Inventors

• Naruse Junichi
• Hiramatsu Hidehiko
• Siegel Donald
• Smith Jeffrey
• VARDAR Gulin
• Monroe Charles

Classifications

• H01M4/9016 Primary

  Oxides, hydroxides or oxygenated metallic salts · CPC title

• H01M12/08

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title

• H01M2220/20

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

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/9008

  Organic or organo-metallic compounds · CPC title