Coated housing for ultracapacitor

Patent metadata

Field	Value
Publication number	US-9728342-B2
Application number	US-201314047798-A
Country	US
Kind code	B2
Filing date	Oct 7, 2013
Priority date	Oct 8, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

An electric double-layer ultracapacitor configured to maintain desired operation at an operating voltage of three volts, where the capacitor includes a housing component, a first and a second current collector, a positive and a negative electrode electrically coupled to one of the first and second current collectors, and a separator positioned between the positive and the negative electrode. The capacitor may also include a protective coating disposed on an inner surface of the housing for the ultracapacitor.

First claim

What is claimed is:

1. An ultracapacitor comprising:
a positive electrode;
a negative electrode;
a separator positioned between the positive electrode and the negative electrode;
an electrolyte in ionic contact with the positive electrode and the negative electrode; and
a housing component to retain the positive electrode, the negative electrode, the separator and the electrolyte, wherein the housing component comprises an inner surface having a coating,
wherein the ultracapacitor is configured to operate at 3 volts or greater at 65° C. and maintain greater than 80% of its initial capacitance for over 1500 hours.

2. The ultracapacitor of claim 1 , wherein the housing component comprises an inner surface exposed to the electrolyte and an outer surface and wherein a protective coating is applied along at least a portion of the inner surface.

3. The ultracapacitor of claim 2 , wherein the protective coating comprises a conductive material.

4. The ultracapacitor of claim 2 , wherein the protective coating comprises a non-conductive material.

5. The ultracapacitor of claim 4 , wherein the protective coating comprises a polymeric material.

6. The ultracapacitor of claim 5 , wherein the polymeric material comprises at least one of polyepoxide, polyolefin, polyethylene, polyimide, polyether ether ketone, polyurethane, ethylene propylene rubber, poly(p-xylylene), polytetrafluoroethylene (PTFE), polyvinylidene difluoride (PVDF), ethylene tetrafluoroethylene (ETFE), fluorinated ethylene propylene, and/or copolymers thereof.

7. The ultracapacitor of claim 4 , wherein the protective coating comprises a ceramic coating.

8. The ultracapacitor of claim 1 , wherein the positive electrode comprises a dry electrode film comprising carbon and binder.

9. The ultracapacitor of claim 1 , wherein the ultracapacitor is configured to operate at 65° C. with a cycle life of greater than 500 k cycles.

10. An ultracapacitor comprising:
a positive electrode;
a negative electrode;
a separator positioned between the positive electrode and the negative electrode;
an electrolyte in ionic contact with the positive electrode and the negative electrode; and
a housing component to retain the positive electrode, the negative electrode, the separator and the electrolyte, wherein the housing component comprises an inner surface having a coating,
wherein the ultracapacitor is configured to operate at 3 volts or greater at 65° C. and maintain less than 200% of its initial equivalent series resistance for over 1500 hours.

11. The ultracapacitor of claim 1 , wherein the electrolyte comprises acetonitrile.

12. The ultracapacitor of claim 10 , wherein the housing component comprises an inner surface exposed to the electrolyte and an outer surface and wherein a protective coating is applied along at least a portion of the inner surface.

13. The ultracapacitor of claim 12 , wherein the protective coating comprises a conductive material.

14. The ultracapacitor of claim 12 , wherein the protective coating comprises a non-conductive material.

15. The ultracapacitor of claim 14 , wherein the protective coating comprises a polymeric material.

16. The ultracapacitor of claim 15 , wherein the polymeric material comprises at least one of polyepoxide, polyolefin, polyethylene, polyimide, polyether ether ketone, polyurethane, ethylene propylene rubber, poly(p-xylylene), polytetrafluoroethylene (PTFE), polyvinylidene difluoride (PVDF), ethylene tetrafluoroethylene (ETFE), fluorinated ethylene propylene, and/or copolymers thereof.

17. The ultracapacitor of claim 14 , wherein the protective coating comprises a ceramic coating.

18. The ultracapacitor of claim 10 , wherein the positive electrode comprises a dry electrode film comprising carbon and binder.

19. The ultracapacitor of claim 10 , wherein the ultracapacitor is configured to operate at 65° C. with a cycle life of greater than 500 k cycles.

20. The ultracapacitor of claim 10 , wherein the electrolyte comprises acetonitrile.

21. The ultracapacitor of claim 10 , wherein the ultracapacitor is configured to operate at 3 volts or greater at 65° C. and maintain greater than 80% of its initial capacitance for over 1500 hours.

Assignees

• Maxwell Lab

Inventors

• Bendale Priya
• Crawford Robert
• Mitchell Porter
• Nelson Jeffrey
• Schafer Doug
• Xi Xiaomei

Classifications

• H01G11/60

  characterised by the solvent · CPC title

• H01G11/58

  Liquid electrolytes · CPC title

• H01G11/54

  Electrolytes · CPC title

• H01G11/14 Primary

  Arrangements or processes for adjusting or protecting hybrid or EDL capacitors (emergency protective circuit arrangements specially adapted for capacitors, and effecting automatic switching in the event of an undesired change from normal working conditions H02H7/16; emergency protective circuit arrangements for limiting excess current or voltages without disconnection H02H9/00) · CPC title

• H01G11/78

  Cases; Housings; Encapsulations; Mountings · CPC title