High energy density aluminum battery

Patent metadata

Field	Value
Publication number	US-9997802-B2
Application number	US-201615257455-A
Country	US
Kind code	B2
Filing date	Sep 6, 2016
Priority date	Sep 30, 2010
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

Compositions and methods of making are provided for a high energy density lithium-aluminum battery. The battery comprises an anode comprising aluminum metal. The battery further comprises a cathode comprising a lithium metal oxide. The battery further comprises an electrolyte capable of supporting reversible deposition and stripping of aluminum at the anode, and reversible intercalation and deintercalation of lithium at the cathode.

First claim

What is claimed is:

1. A secondary battery comprising:
an anode comprising aluminum metal;
a cathode comprising a lithium metal oxide; and
an ionic liquid electrolyte consisting essentially of aluminum chloride, ethylmethylimidazolium chloride, and lithium chloroaluminate, the aluminum chloride and ethylmethylimidazolium chloride being in a molar ratio greater than 1:1.

2. The battery of claim 1 , wherein the secondary battery is assembled in a charged state.

3. The battery of claim 1 , wherein the secondary battery maintains a discharge capacity of at least 50% of an initial discharge capacity after 50 discharge cycles.

4. The battery of claim 1 , wherein the anode is an aluminum metal alloy.

5. The battery of claim 4 , wherein the aluminum metal alloy comprises an element selected from the group consisting of: copper, magnesium, manganese, silicon, titanium, zinc, or mixtures thereof.

6. The battery of claim 1 , wherein the electrolyte comprises an organic solvent having a high dielectric constant.

7. The battery of claim 6 , wherein the organic solvent is selected from the group consisting of propylene carbonate, ethylmethylsulfone, ethylmethoxyethylsulfone, and methoxyethylmethyl sulfone.

8. The battery of claim 1 , wherein the battery is used in a grid storage application, vehicle battery application, portable electronic device application, or standard cell size battery application.

9. The battery of claim 1 , wherein the lithium metal oxide is lithium iron phosphate.

10. The battery of claim 1 , wherein the lithium metal oxide is lithium cobalt oxide.

11. The battery of claim 1 , wherein the lithium metal oxide is lithium manganese oxide.

12. The battery of claim 1 , wherein the molar ratio of the aluminum chloride to the ethylmethylimidazolium chloride is 1.1:1.0.

13. The battery of claim 10 , wherein the lithium cobalt oxide has the formula LiCoO 2 .

14. The battery of claim 11 , wherein the lithium manganese oxide has the formula LiMn 2 O 4 .

15. A secondary battery comprising:
an anode comprising aluminum metal;
a cathode comprising lithium iron phosphate; and
an ionic liquid electrolyte consisting essentially of aluminum chloride, ethylmethylimidazolium chloride, and lithium chloroaluminate, the aluminum chloride and ethylmethylimidazolium chloride being in a molar ratio greater than 1:1,
wherein the electrolyte is capable of supporting reversible deposition and stripping of aluminum at the anode, and reversible intercalation and deintercalation of lithium at the cathode.

Assignees

• Ut Battelle Inc
• Ut Battelle Llc

Inventors

• Brown Gilbert M
• Parans Paranthaman Mariappan
• Dai Sheng
• Sun Xiao-Guang
• Liu Hansan

Classifications

• H01M10/0568

  characterised by the solutes · CPC title

• H01M10/054 Primary

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

• H01M4/38

  of elements or alloys · CPC title

• H01M4/50

  of manganese · CPC title

• H01M6/16

  with organic electrolyte (H01M6/18 takes precedence) · CPC title