# US 7,612,985 B2 · Electrochemical double-layer capacitor using organosilicon electrolytes

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- Number: US 7,612,985 B2
- Document ID: US7612985B2
- Status: Granted
- Kind: B2
- Application number: 12/168,405
- Filed: 2008-07-07
- Published: 2008-11-06
- Granted: 2009-11-03
- Earliest claimed: 2005-09-30
- Assignees: Wisconsin Alumni Research Foundation
- Inventors: Viacheslav V. Dementiev; Robert C. West; Robert J. Hamers; Kiu-Yuen Tse
- Web page: https://patentgrep.com/patent/US7612985B2

## CPC

- H01G 11/62: characterised by the solute, e.g. salts, anions or cations therein
- 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
- H01G 11/26: characterised by their structure, e.g. multi-layered, porosity or surface features
- H01G 11/38: Carbon pastes or blends; Binders or additives therein
- H01G 11/58: Liquid electrolytes
- Y02B 10/30: Wind power
- Y02E 60/13: Energy storage using capacitors
- Y02T 10/70: Energy storage systems for electromobility, e.g. batteries
- 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)
- Y02B: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02T: CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION

## Abstract

Disclosed are supercapacitors having organosilicon electrolytes, high surface area/porous electrodes, and optionally organosilicon separators. Electrodes are formed from high surface area material (such as porous carbon nanotubes or carbon nanofibers), which has been impregnated with the electrolyte. These type devices appear particularly suitable for use in electric and hybrid electric vehicles.

## Claims

### Claim 1

An electrode f or use in an electrochemical capacitor, the electrode comprising:
a solid material with an exposed surface, wherein the exposed surface is selected from the group consisting of aligned arrays of nanostructured carbon and aligned arrays of carbon nanofibers;
an organosilicon ion-conducting material; and
a salt.

### Claim 2 (depends on 1)

The electrode of claim 1, wherein the material is a cross-linked polysiloxane.

### Claim 3 (depends on 1)

The electrode of claim 1, wherein the salt is a lithium salt selected from the group consisting of lithium-tetrafluoroborate, lithium-bis (trifluoromethyl-sulfonyl)imide, and lithium bis-(oxalatoborate).

### Claim 4

An electrode for use in an electrochemical capacitor, the electrode comprising:
a solid material with an exposed surface;
an organosilicon ion-conducting material; and a salt;
wherein the organosilicon ion-conducting material comprises an oligoethyleneoxide substituted organosilicon compound which has the following moiety in it:
wherein m is such that the compound is a polysiloxane and q is such that the compound is an oligoethyleneoxide substituted organosilicon compound.

### Claim 5

An electrochemical double-layer capacitor comprising a separator to inhibit short circuiting that is disposed between first and second electrodes, wherein the separator comprises an organosilicon ion-conducting material which is a cross-linked oligoethyleneoxide substituted organosiloxane compound.