# US 9,437,369 B2 · Conductive material with charge-storage material in voids

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- Number: US 9,437,369 B2
- Document ID: US9437369B2
- Status: Granted
- Kind: B2
- Application number: 14/407,125
- Filed: 2013-07-10
- Published: 2015-08-20
- Granted: 2016-09-06
- Earliest claimed: 2012-07-11
- Assignees: JME Inc.
- Applicants: JME, Inc.
- Inventors: John R. Miller
- Web page: https://patentgrep.com/patent/US9437369B2

## CPC

- H01G 11/36: Nanostructures, e.g. nanofibres, nanotubes or fullerenes
- H01G 11/04: Hybrid capacitors
- H01G 11/28: arranged or disposed on a current collector; Layers or phases between electrodes and current collectors, e.g. adhesives
- H01G 11/56: Solid electrolytes, e.g. gels; Additives therein
- H01G 11/46: Metal oxides
- H01G 11/50: specially adapted for lithium-ion capacitors, e.g. for lithium-doping or for intercalation
- Y02E 60/13: Energy storage using capacitors
- Y10T 428/24446: Wrinkled, creased, crinkled or creped
- Y10T 428/30: Self-sustaining carbon mass or layer with impregnant or other layer
- H01G: CAPACITORS; CAPACITORS, RECTIFIERS, DETECTORS, SWITCHING DEVICES, LIGHT-SENSITIVE OR TEMPERATURE-SENSITIVE DEVICES OF THE ELECTROLYTIC TYPE (selection of specified materials as dielectric H01B3/00; capacitors having potential barriers H10D1/62, H10K10/10)
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION

## Abstract

A conductive material includes a graphene-nanonsheet material, with charge-storage material in voids in and/or coating the graphene material. The charge-storage material may include any of a variety of types of carbon, including carbon black, acetylene black, furnace black, carbon fibers, carbon nanotubes, graphene in the form of wrinkled sheets of graphene, carbon nano-onions, or hydrothermal-synthesized nanospheres of carbon material. Alternatively, the charge-storage material may be non-carbon pseudocapacitive materials. Also, the charge-storage material may involve Faradaic processes similar to those observed with battery electrodes. The conductive material may be formed or placed on a conductive or a dielectric substrate. One or more gaps may be formed in the conductive material, with the conductive material forming two or more electrodes. The electrodes may then be covered with an electrolyte material, to produce an electric double layer capacitor.

## Claims

### Claim 1

A capacitor device comprising:
a dielectric substrate;
a conductive substrate on the dielectric substrate;
graphene material on the conductive substrate; charge-storage material amid the graphene material; and
an electrolyte;
wherein the conductive substrate, the graphene material, and the charge-storage material are separated into more than two electrodes, with a gaps between respective pairs of adjacent of the electrodes; and
wherein the electrolyte is in separate strips, electrically isolated from one another with spaces between the strips, spanning respective of the gaps, with each of the strips in contact with one or both of the graphene material and the charge-storage material on both sides of one of the gaps, thereby forming multiple capacitors that are electrically coupled together in series.

### Claim 2 (depends on 1)

The capacitor device of claim 1, wherein electrical conductivity across the conductive material is primarily through the conductive substrate.

### Claim 3 (depends on 1)

The capacitor device of claim 1, wherein the electrolyte material is a solid electrolyte material.

### Claim 4 (depends on 1)

The capacitor device of claim 1, wherein the electrolyte material is a gelled liquid electrolyte material.

### Claim 5 (depends on 1)

The capacitor device of claim 1, wherein the electrolyte material is an ionic liquid material.

### Claim 6 (depends on 1)

The capacitor device of claim 1, wherein the gaps each have a serpentine shape.

### Claim 7 (depends on 1)

The capacitor device of claim 1, wherein the conductive substrate is a nickel substrate.

### Claim 8

A planar capacitor device comprising:
a dielectric substrate;
a conductive material layer on the dielectric substrate, wherein the conductive material layer has at least two gaps therein, forming separate electrodes; and
electrolyte material in separate strips, electrically isolated from one another with spaces between the strips, covering respective of the gaps, with each electrolyte material strip in contact with the electrodes on opposite sides of the respective gap, the electrodes and the electrolyte material strips thereby forming multiple capacitors that are electrically coupled together in series.

### Claim 9 (depends on 8)

The capacitor device of claim 8, wherein the gaps each have a serpentine shape.

### Claim 10 (depends on 8)

The capacitor device of claim 8, wherein the conductive material layer includes nickel.

### Claim 11 (depends on 8)

The capacitor device of claim 8, wherein the conductive material layer includes a graphene material.

### Claim 12 (depends on 11)

The capacitor device of claim 11, wherein the conductive material layer includes a charge-storage material amid the graphene material.

### Claim 13 (depends on 8)

The capacitor device of claim 8, wherein the electrolyte material is a solid electrolyte material.

### Claim 14 (depends on 8)

The capacitor device of claim 8, wherein the electrolyte material is a gelled liquid electrolyte material.

### Claim 15 (depends on 8)

The capacitor device of claim 8, wherein the electrolyte material is an ionic liquid material.

### Claim 16 (depends on 8)

The capacitor device of claim 8, wherein at least some of the electrodes are electrodes for multiple of the capacitors.