Low temperature sulfur and sodium metal battery for grid-scale energy storage application

Patent metadata

Field	Value
Publication number	US-9929432-B2
Application number	US-201314385030-A
Country	US
Kind code	B2
Filing date	Mar 15, 2013
Priority date	Mar 15, 2012
Publication date	Mar 27, 2018
Grant date	Mar 27, 2018

Abstract

A re-chargeable battery comprising a non-dendrite forming sodium (Na)/potassium (K) liquid metal alloy anode, a sulfur and polyacrylonitrile (PAN) conductive polymer composite cathode, a polyethyleneoxide (PEO) solid electrolyte, a solid electrolyte interface (SEI) formed on the PEO solid electrolyte; and a cell housing, wherein the anode, cathode, and electrolyte are assembled into the cell housing with the PEO solid electrolyte disposed between the cathode and anode.

First claim

What is claimed is:

1. A re-chargeable battery comprising:
a non-dendrite forming sodium (Na)/potassium (K) liquid metal alloy anode;
a sulfur and polyacrylonitrile (PAN) conductive polymer composite cathode;
a polyethyleneoxide (PEO) solid electrolyte;
a solid electrolyte interface (SEI) directly in contact with the PEO solid electrolyte, wherein the PEO solid electrolyte completely surrounds the sulfur and PAN composite cathode; and
a cell housing, wherein the anode, cathode, and electrolyte are assembled into the cell housing.

2. The re-chargeable battery of claim 1 , wherein the PEO solid electrolyte comprises a sodium triflate salt and a potassium triflate salt.

3. The re-chargeable battery of claim 1 , wherein a potassium concentration in the sodium and potassium alloy is approximately 40% K to 90% K by weight.

4. The re-chargeable battery of claim 2 , wherein the sodium and potassium liquid metal alloy is approximately 56% K and 44% Na by weight.

5. The re-chargeable battery of claim 1 , wherein the PEO is cross-linked.

6. The re-chargeable battery of claim 5 , wherein the PEO is UV cross-linked with a benzophenone initiator.

7. The re-chargeable battery of claim 1 , wherein the PEO solid electrolyte is a Na/K ion conducting membrane.

8. The re-chargeable battery of claim 1 , wherein the PEO solid electrolyte prevents the anode from contacting the cathode.

9. The re-chargeable battery of claim 1 , wherein the PEO oxygen to Na ion ratio is at 20:1 and the PEO oxygen to K ion ratio is at 20:1.

10. The re-chargeable battery of claim 1 wherein the anode comprises a copper Cu current collector.

11. The re-chargeable battery of claim 1 , wherein the cathode comprises an aluminum Al current collector.

Assignees

• Univ California

Inventors

• Liu Gao
• Wang Dongdong

Classifications

• H01M50/414

  Synthetic resins, e.g. thermoplastics or thermosetting resins · CPC title

• H01M10/0565

  Polymeric materials, e.g. gel-type or solid-type · CPC title

• H01M10/056 Primary

  characterised by the materials used as electrolytes, e.g. mixed inorganic/organic electrolytes · CPC title

• H01M4/40

  Alloys based on alkali metals · CPC title

• H01M10/3918

  characterised by the electrolyte · CPC title