Devices and methods for high voltage and solar applications

Patent metadata

Field	Value
Publication number	US-2017278643-A1
Application number	US-201715466425-A
Country	US
Kind code	A1
Filing date	Mar 22, 2017
Priority date	Mar 23, 2016
Publication date	Sep 28, 2017
Grant date	—

Abstract

Provided herein are devices comprising one or more cells, and methods for fabrication thereof. The devices may be electrochemical devices. The devices may include three-dimensional supercapacitors. The devices may be microdevices such as, for example, microsupercapacitors. In some embodiments, the devices are three-dimensional hybrid microsupercapacitors. The devices may be configured for high voltage applications. In some embodiments, the devices are high voltage microsupercapacitors. In certain embodiments, the devices are high voltage asymmetric microsupercapacitors. In some embodiments, the devices are integrated microsupercapacitors for high voltage applications.

First claim

What is claimed is:

1 . An electrochemical system, comprising a planar array of interconnected electrochemical cells, wherein each electrochemical cell comprises at least two electrodes, wherein each electrode comprises a carbonaceous material, wherein at least one electrode further comprises a pseudocapacitive material.

2 . The electrochemical system of claim 1 , wherein the carbonaceous material comprises an interconnected corrugated carbon-based network (ICCN), a laser scribed graphene (LSG) or any combination thereof.

3 . The electrochemical system of claim 1 , wherein each electrochemical cell comprises two electrodes, and wherein each electrode comprises a carbonaceous material and a pseudocapacitive material.

4 . The electrochemical system of claim 1 , wherein the pseudocapacitive material comprises MnO 2 , RuO 2 , Co 3 O 4 , NiO, Fe 2 O 3 , CuO, MoO 3 , V 2 O 5 , Ni(OH) 2 , or any combination thereof.

5 . The electrochemical system of claim 1 , wherein the planar array of interconnected electrochemical cells is arranged in an interdigitated structure.

6 . The electrochemical system of claim 1 , further comprising an electrolyte disposed between the at least two electrodes.

7 . The electrochemical system of claim 1 , further comprising a current collector attached to an electrode.

8 . The electrochemical system of claim 1 , wherein at least one electrochemical cell is capable of outputting a voltage of at least about 5 volts.

9 . The electrochemical system of claim 1 , wherein the electrochemical system is capable of outputting a voltage of at least 100 volts.

10 . The electrochemical system of claim 1 , wherein an electrochemical cell has an energy density of at least about 22 watt-hours per liter (Wh/L).

11 . The electrochemical system of claim 1 , wherein the planar array of interconnected electrochemical cells has a capacitance per footprint of at least about 380 millifarads per square centimeter (mF/cm 2 ).

12 . The electrochemical system of claim 1 , wherein the planar array of interconnected electrochemical cells has a volumetric capacitance of at least about 1,100 farads per cubic centimeter (F/cm 3 ).

13 . A method for fabricating an electrochemical system, comprising:
forming a carbonaceous film; forming a carbonaceous framework from the carbonaceous film; patterning the carbonaceous framework to form an array of two or more cells, wherein each cell comprises at least two electrodes; and electrodepositing a pseudocapacitive material onto a portion of the array.

14 . The method of claim 13 , wherein the carbonaceous film comprises graphene oxide (GO).

15 . The method of claim 13 , wherein the carbonaceous film comprises a three dimensional carbon framework comprising an interconnected corrugated carbon-based network (ICCN), a laser scribed graphene (LSG), or any combination thereof.

16 . The method of claim 13 , wherein the forming of the carbonaceous framework from the carbonaceous film comprises light scribing.

17 . The method of claim 13 , wherein the patterning the carbonaceous framework comprises light scribing.

18 . The method of claim 13 , wherein the patterning the carbonaceous framework forms two or more interdigitated electrodes.

19 . The method of claim 13 , wherein the array is a planar array.

20 . The method of claim 13 , wherein the pseudocapacitive material comprises MnO 2 , RuO 2 , Co 3 O 4 , NiO, Fe 2 O 3 , CuO, MoO 3 , V 2 O 5 , Ni(OH) 2 , or any combination thereof.

21 . The method of claim 13 , further comprising depositing an electrolyte on the carbonaceous framework.

22 . The method of claim 13 , further comprising connecting two or more cells within the array.

Assignees

• Univ California
• Nanotech Energy Inc

Inventors

• El-Kady Maher F
• Kaner Richard B
• Kavanaugh Jack

Classifications

• Y02E60/13

  Energy storage using capacitors · CPC title

• H01G11/86

  specially adapted for electrodes (carbonisation or activation of carbon for the manufacture of electrodes H01G11/34) · CPC title

• H01G11/28

  arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives · CPC title

• H01G11/32 Primary

  Carbon-based · CPC title

• H01G11/66

  Current collectors · CPC title