Supercapacitor

• US 5,151,848 A
• Filed: 08/24/1990
• Issued: 09/29/1992
• Est. Priority Date: 08/24/1990
• Status: Expired due to Fees

• Current Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Original Assignee: United States Of America As Represented By The Secretary Of The Air Force
• Inventors: Finello, Duane
• Primary Examiner(s): Swann, Tod R.
• Application Number:
  US07/573,935
• Time in Patent Office: 767 Days
• Field of Search: 361/502, 361/504, 361/523, 361/524
• US Class Current: 361/502
• CPC Class Codes: H01G 11/24 characterised by structural features of the materials making up or comprised in the electrodes, e.g. form, surface area or porosity; characterised by the structural features of powders or particles used therefor
• CPC Class Codes: H01G 11/46 Metal oxides
• CPC Class Codes: H01G 11/56 Solid electrolytes, e.g. gels; Additives therein
• CPC Class Codes: H01G 11/84 Processes for the manufacture of hybrid or EDL capacitors, or components thereof
• CPC Class Codes: Y02E 60/13 Energy storage using capacitors

Abstract

The invention is a supercapacitor cell having electrode plates of titanium coated with ruthenia impregnated with the solid polymer electrolyte perfluorosulfonic acid. The impregnation is carried out in a high pressure shock apparatus.

Claims

1. A supercapacitor, said supercapacitor comprising:

a first plate, said first plate having a porous surface;

a second plate, said second plate having a porous surface;

a solid polymer electrolyte, said solid polymer electrolyte impregnated into the porous surface of said first and said second plate;

means for electrically connecting to said plates; and

means for housing said plates with said solid polymer electrolyte therein and said means for electrically connecting, said supercapacitor having an energy density ranging from 0.1 to 2.0 joules per cubic centimeter.

2. A supercapacitor as defined in claim 1 wherein said plates are composed of titanium coated with high surface area ruthenia.

3. A supercapacitor as defined in claim 1 wherein said solid polymer electrolyte is perfluorosulfonic acid.

4. A process of making a supercapacitor cell, said process comprising the steps of:

assembling a sandwich of at least one pair of plates and a layer of solid polymer electrolyte between each pair of plates;

placing said sandwich in a receiving chamber of a means for providing a high pressure shock wave to said receiving chamber;

applying sufficient high pressure to cause said solid polymer electrolyte to impregnate into said plates; and

removing said supercapacitor cell from said receiving chamber after applying said sufficient high pressure.

5. A process as defined in claim 4 wherein said plates comprise titanium coated with high surface area ruthenia.

6. A process as defined in claim 5 wherein said solid polymer electrolyte comprises perfluorosulfonic acid.

7. A process as defined in claim 5 wherein said sufficient pressure is about one kilobar.

8. A process as defined in claim 5 wherein said supercapacitor cell has an energy density of about 0.1 to about 2.0 joules per cubic centimeter.