High Specific Capacitance And High Power Density Of Printed Flexible Micro-Supercapacitors

Patent metadata

Field	Value
Publication number	US-2016172123-A1
Application number	US-201314436534-A
Country	US
Kind code	A1
Filing date	Oct 17, 2013
Priority date	Oct 17, 2012
Publication date	Jun 16, 2016
Grant date	—

Abstract

The invention relates to micro supercapacitors and nanocomposite active materials and methods of fabrication thereof.

First claim

What is claimed is:

1 . A micro supercapacitor, comprising:
a substrate; a first metal electrode; a second metal electrode; an active material coating the first metal electrode and the second metal electrode, comprising manganese oxide (MnO 2 ), carbon nanostructures and optionally a binder; and an electrolyte, wherein the first metal electrode and the second metal electrode are located in the same plane on the substrate.

2 . The micro supercapacitor of claim 1 , wherein the carbon nanostructure comprises onion like carbon, carbon nanotubes, conductive carbon black, or a combination thereof.

3 . The micro supercapacitor of claim 1 , wherein the substrate is flexible.

4 . The micro supercapacitor of claim 1 , wherein the substrate comprises polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polyethersulfone (PES), photographic paper, insulated thermal tape, or a combination thereof.

5 . The micro supercapacitor of claim 1 , wherein the metal electrode comprises a metal selected from silver (Ag), gold (Au), copper (Cu), aluminum (Al), platinum (Pt), or a combination or alloys thereof.

6 . The micro supercapacitor of claim 1 , wherein the electrolyte comprises a solid electrolyte.

7 . The micro supercapacitor of claim 1 , wherein the binder is a polymer or copolymer comprising vinylidene fluoride, trifluoroethylene, chlorotrifluoroethylene, tetrafluoroethylene, hexafluoropropylene, 1,1-chlorofluoroethylene, poly(methyl methacrylate), 11-aminoundecanoic acid, thiourea, or a combination thereof.

8 . The micro supercapacitor of claim 1 , wherein the active material comprises manganese oxide (MnO 2 ) deposited on the surface of onion-like carbon.

9 . The micro supercapacitor of claim 1 , wherein the active material comprises manganese oxide (MnO 2 ) and carbon nanotubes.

10 . The micro supercapacitor of claim 1 , wherein the first metal electrode and the second metal electrode are patterned.

11 . The micro supercapacitor of claim 10 , wherein the first metal electrode and the second metal electrode are patterned to create channels between the first metal electrode and the second metal electrode.

12 . The micro supercapacitor of claim 11 , wherein the channel width is less than about 1 mm.

13 . A method of making a micro supercapacitor, comprising
a) screen printing a metal ink on a substrate to form a first metal electrode and a second metal electrode; b) drying the first metal electrode and the second metal electrode under vacuum and elevated temperature; c) screen printing an active material ink on top of the first metal electrode and the second metal electrode to form an active material on the first and second metal electrode; d) drying the active material on the first and second metal electrode at an elevated temperature; and e) drop-casting a solid electrolyte onto the active material on the first and second metal electrode to form the micro supercapacitor.

14 . The method of claim 13 , wherein the active material comprises a carbon nanostructure, a metal oxide, or combination thereof.

15 . The method of claim 13 , wherein the active material comprises manganese oxide (MnO 2 ) and carbon nanotubes.

16 . The method of claim 13 , wherein the active material comprises manganese oxide (MnO 2 ) and onion like carbon.

17 . The method of claim 13 , wherein the active material comprises manganese oxide (MnO 2 ) and graphene.

18 . The method of claim 13 , wherein the first metal electrode and the second metal electrode are patterned to create channels between the first metal electrode and the second metal electrode.

19 . An active material, comprising:
manganese oxide (MnO 2 ) grown on the surface of onion-like carbon.

20 . The active material of claim 19 , wherein the onion-like carbon has a diameter between about 15 nm and about 40 nm.

21 . The active material of claim 19 , wherein the manganese oxide (MnO 2 ) grown on the surface of onion-like carbon forms a nanocomposite having a diameter between about 50 nm and about 400 nm.

22 . The active material of claim 19 , wherein the nanocomposite exhibits a flower-like structure composed of manganese oxide (MnO 2 ) nanoribbons radiating from the onion-like carbon center of the nanocomposite.

Assignees

• Univ Singapore Technology & Design

Inventors

• Yang Hui Ying
• Wang Ye

Classifications

• H01G11/84

  Processes for the manufacture of hybrid or EDL capacitors, or components thereof · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01G11/36 Primary

  Nanostructures, e.g. nanofibres, nanotubes or fullerenes · CPC title

• H01G11/38

  Carbon pastes or blends; Binders or additives therein · CPC title

• H01G11/56

  Solid electrolytes, e.g. gels; Additives therein · CPC title