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Multilayer electrodes for supercapacitors

A technology of multilayer electrodes and electric double layer capacitors, which is applied in the manufacture of hybrid capacitor electrodes, hybrid capacitor current collectors, and hybrid/electric double layer capacitors, etc., can solve the problems of low equivalent series resistance and increase device power density.

Inactive Publication Date: 2016-06-01
CORNING INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, in order to increase the power density of the device, the equivalent series resistance (ESR) of the whole device should be low

Method used

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  • Multilayer electrodes for supercapacitors
  • Multilayer electrodes for supercapacitors
  • Multilayer electrodes for supercapacitors

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0076] Embodiment 1 (comparative example)

[0077] A reference activated carbon layer was laminated to both sides of a commercially available current collector (Exopack, Matthews, NC) at room temperature. The thickness of the activated carbon layer is about 250 μm. The reference activated carbon layer used in this and the following examples comprises a commercially available activated carbon material [Kuraray Carbon Inc., Osaka, Japan] mixed with carbon black and a binder, The ratio is 85% by weight of activated carbon, 5% by weight of carbon black and 10% by weight of (PTFE).

[0078] The measured through-surface area specific resistance is 0.25Ω·cm 2 (Just prepared), 90Ω·cm after exposure to a temperature of 150°C for 16 hours 2 .

Embodiment 2

[0079] Embodiment 2 (comparative example)

[0080] An aqueous slurry of conductive ink containing approximately equal weight fractions of carbon black and graphite was dip-coated onto both sides of an aluminum 1145H19 foil. The average thickness of each conductive adhesive layer is about 1-3 μm. The reference activated carbon layer was laminated to the conductive adhesive layer at a lamination temperature of 200°C and a lamination pressure of 250 pli (pounds per linear inch). The thickness of the activated carbon layer is about 250 μm. The through-surface area specific resistance of the obtained electrode when it is just formed is 0.04Ω·cm 2 . After exposure to a temperature of 150°C for 16 hours, the through-surface area specific resistance is 0.05Ω·cm 2 .

Embodiment 3-5

[0081] Embodiment 3-5 (comparative example)

[0082] The experiment in Example 2 was repeated using a pre-etched aluminum current collector substrate sold by KDK Corporation, Tokyo, Japan. The substrates were designated as G571, C208 or C209 according to their respective etch protocols. The thickness of aluminum corresponding to G571 is about 75 μm, and that of aluminum corresponding to C208 and C209 is about 50 μm. After laminating the reference activated carbon layer, the through-surface area specific resistance of the newly formed electrode and the electrode that has passed the stress test are both 0.05-0.06Ω·cm 2 changes within the range.

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Abstract

A multilayer electrode comprising a current collector having opposing first and second major surfaces, a layer of fused carbon formed on one or both major surfaces, a conductive adhesive layer formed on each layer of fused carbon , and an activated carbon layer formed on each conductive adhesive layer. The multilayer electrodes can be incorporated into high energy density, high power density devices such as electric double layer capacitors.

Description

[0001] Declaration of interest in earlier application required [0002] This application claims priority under 35 USC §120 to US Patent Application Serial No. 12 / 788,425, filed May 27, 2010, which application is based upon and is incorporated herein in its entirety. technical field [0003] This invention relates generally to electric double layer capacitors, and more particularly to multilayer electrode structures having low equivalent series resistance for incorporation in such devices. Background technique [0004] Energy storage devices such as supercapacitors can be used in many applications that require discrete pulses of power. Exemplary applications range from cell phones to electric or hybrid vehicles. Energy storage devices typically comprise a porous separator and / or an organic electrolyte sandwiched between a pair of carbon-based electrodes. Energy storage is achieved by separating and storing charges in the electrochemical double layer at the interface between...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01G11/28H01G11/32H01G11/86
CPCH01G11/26H01G11/28H01G11/38H01G11/70H01G11/86Y02E60/13Y02T10/70
Inventor K·P·加德卡里J·R·里姆K·P·雷迪
Owner CORNING INC