Ether-based electrolyte for Na-ion battery anode

Patent metadata

Field	Value
Publication number	US-10693183-B2
Application number	US-201514683038-A
Country	US
Kind code	B2
Filing date	Apr 9, 2015
Priority date	Apr 9, 2015
Publication date	Jun 23, 2020
Grant date	Jun 23, 2020

Abstract

A sodium-ion battery that includes an anode comprising hard carbon and lithium; and an electrolyte composition comprising an ether solvent and a sodium salt.

First claim

What is claimed is:

1. A device comprising:
an anode comprising hard carbon and lithium metal powder, wherein the lithium metal powder is present in the anode in an amount of 0.01 to 20 mg lithium/mg hard carbon and the hard carbon is present in the anode in an amount of greater than 50 weight percent, based on the total dry weight of the hard carbon and lithium metal powder combined; and wherein sodium ions can intercalate into, and de-intercalate from, the anode;
a cathode wherein sodium ions can intercalate into, and de-intercalate from, the cathode; and
an electrolyte composition comprising an ether solvent and a sodium salt, wherein the ether solvent is selected from triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof,
wherein the anode, the cathode and the electrolyte composition are configured as a sodium-ion battery.

2. The device of claim 1 , wherein the ether solvent is tetraethylene glycol dimethyl ether.

3. The device of claim 1 , wherein the sodium salt is selected from NaPF 6 , NaBF 4 , NaClO 4 , NaAsF 6 , NaCF 3 SO 3 , NaN(CF 3 SO 2 ) 2 , NaN(C 2 F 5 SO 2 ) 2 , NaN(FSO 2 ) 2 , NaC(CF 3 SO 2 ) 3 , NaC 2 F 6 NO 4 S 2 , and sodium bis(fluorosulfonyl) imide, or a mixture thereof.

4. The device of claim 1 , wherein the electrolyte composition does not include a carbonate.

5. The device of claim 1 , wherein the electrolyte composition does not include a carbonate.

6. The device of claim 1 , wherein the lithium is present in the anode in an amount of 0.01 to 1 mg lithium/mg hard carbon.

7. A device comprising:
an anode comprising hard carbon and lithium metal powder, wherein the hard carbon is present in the anode in an amount of greater than 50 weight percent, based on the total dry weight of the hard carbon and lithium metal powder combined, and sodium ions can intercalate into, and de-intercalate from, the anode;
a cathode wherein sodium ions can intercalate into, and de-intercalate from, the cathode; and
an electrolyte composition comprising an ether solvent and a sodium salt, wherein the ether solvent is selected from triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof,
wherein the anode, the cathode and the electrolyte composition are configured as a sodium-ion battery.

8. The device of claim 7 , wherein the ether solvent is tetraethylene glycol dimethyl ether.

9. The device of claim 7 , wherein the electrolyte composition does not include a carbonate.

10. The device of claim 7 , wherein the lithium is present in the anode in an amount of 0.01 to 20 mg lithium/mg hard carbon.

11. The device of claim 7 , wherein the hard carbon is present in the anode in an amount of greater than 80 weight percent, based on the total dry weight of the hard carbon and lithium combined.

12. The device of claim 7 , wherein the hard carbon is present in the anode in an amount of greater than 95 weight percent, based on the total dry weight of the hard carbon and lithium combined.

13. A method comprising fabricating a sodium-ion battery by
combining a lithium metal powder with hard carbon resulting in a prelithiated anode, wherein sodium ions can intercalate into, and de-intercalate from, the anode, wherein the hard carbon is present in the anode in an amount of greater than 50 weight percent, based on the total dry weight of the hard carbon and lithium metal powder combined; and
coupling the prelithiated anode with an electrolyte composition comprising an ether solvent and a sodium salt, wherein the ether solvent is selected from triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof, and a cathode wherein sodium ions can intercalate into, and de-intercalate from, the cathode.

14. The method of claim 13 , wherein the lithium is present in the anode in an amount of 0.01 to 20 mg lithium/mg hard carbon.

15. The method of claim 13 , wherein the lithium is present in the anode in an amount of 0.01 to 1 mg lithium/mg hard carbon.

16. The method of claim 13 , wherein the ether solvent is selected from dimethoxyethane, bis(2-methoxyethyl)ether, triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof, and the sodium salt is selected from NaPF 6 , NaBF 4 , NaClO 4 , NaAsF 6 , NaCF 3 SO 3 , NaN(CF 3 SO 2 ) 2 , NaN(C 2 F 5 SO 2 ) 2 , NaN(FSO 2 ) 2 , NaC(CF 3 SO 2 ) 3 , NaC 2 F 6 NO 4 S 2 , and sodium bis(fluorosulfonyl) imide, or a mixture thereof.

17. A device comprising:
an anode consisting of hard carbon, lithium metal powder and a binder, wherein the hard carbon is present in the anode in an amount of greater than 50 weight percent, based on the total dry weight of the hard carbon and lithium metal powder combined and sodium ions can intercalate into, and de-intercalate from, the anode;
a cathode wherein sodium ions can intercalate into, and de-intercalate from, the cathode; and
an electrolyte composition comprising an ether solvent and a sodium salt, wherein the ether solvent is selected from triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof,
wherein the anode, the cathode and the electrolyte composition are configured as a sodium-ion battery.

18. A method comprising fabricating a sodium-ion battery by
combining a lithium metal powder with hard carbon and a binder resulting in a prelithiated anode, wherein the hard carbon is present in the anode in an amount of greater than 50 weight percent, based on the total dry weight of the hard carbon and lithium metal powder combined, wherein sodium ions can intercalate into, and de-intercalate from, the anode; and
coupling the prelithiated anode with an electrolyte composition comprising an ether solvent and a sodium salt, wherein the ether solvent is selected from triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof, and a cathode wherein sodium ions can intercalate into, and de-intercalate from, the cathode.

19. A device comprising:
an anode consisting of hard carbon, lithium metal powder, a binder, and a solvent, wherein the lithium metal powder is present in the anode in an amount of 0.01 to 20 mg lithium/mg hard carbon, the hard carbon is present in the anode in an amount of greater than 50 weight percent, based on the total dry weight of the hard carbon and lithium metal powder combined, and sodium ions can intercalate into, and de-intercalate from, the anode;
a cathode wherein sodium ions can intercalate into, and de-intercalate from, the cathode; and
an electrolyte composition comprising an ether solvent and a sodium salt, wherein the ether solvent is selected from triethylene glycol dimethyl ether, tetraethylene glycol dimethyl ether, polyethyl glycol dimethyl ether, or a mixture thereof,
wherein the anode, the cathode and the electrolyte composition are configured as a sodium-ion battery.

Assignees

• Battelle Memorial Institute

Inventors

• Li Xiaolin
• Liu Jun
• Sprenkle Vincent L

Classifications

• Y02E60/10

  Energy storage using batteries · CPC title

• H01M4/381

  Alkaline or alkaline earth metals elements (H01M4/40 takes precedence) · CPC title

• H01M10/05

  Accumulators with non-aqueous electrolyte (H01M10/39 takes precedence) · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M10/0568

  characterised by the solutes · CPC title