Electrodes Synthesized from Carbon Nanostructures Coated with a Smooth and Conformal Metal Adlayer

a technology of carbon nanostructures and conformal metals, applied in the direction of cell components, capacitor manufacturing, transportation and packaging, etc., can solve the problems of limited charge storage capabilities, inability to achieve high power density, and difficulty in ions in the electrolyte to access intrapore surfaces, etc., to achieve convenient deposition, facilitate deposition, and increase the effect of pore size distribution
US20130045328A1Inactive Publication Date: 2013-02-21BROOKHAVEN SCI ASSOCS
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
BROOKHAVEN SCI ASSOCS
Publication Date
2013-02-21
Estimated Expiration
Not applicable · inactive patent

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Abstract

High-surface-area carbon nanostructures coated with a smooth and conformal submonolayer-to-multilayer thin metal films and their method of manufacture are described. The preferred manufacturing process involves the initial oxidation of the carbon nanostructures followed by a surface preparation process involving immersion in a solution with the desired pH to create negative surface dipoles. The nanostructures are subsequently immersed in an alkaline solution containing a suitable quantity of non-noble metal ions which adsorb at surface reaction sites. The metal ions are then reduced via chemical or electrical means. The nanostructures are exposed to a solution containing a salt of one or more noble metals which replace adsorbed non-noble surface metal atoms by galvanic displacement. The process can be controlled and repeated to obtain a desired film coverage. The resulting coated nanostructures may be used, for example, as high-performance electrodes in supercapacitors, batteries, or other electric storage devices.
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Description

CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application is a divisional application of copending U.S. patent application Ser. No. 12 / 603,216, filed Oct. 21. 2009, which claims the benefit of U.S. Provisional Application No. 61 / 107,048, filed Oct. 21, 2008; the contents of these applications are herein incorporated by reference in their entirety.STATEMENT OF GOVERNMENT LICENSE RIGHTS

[0002] This invention was made with Government support under contract number DE-AC02-98CH10886, awarded by the U.S. Department of Energy. The Government has certain rights in the invention.BACKGROUND OF THE INVENTION

[0003] I. FIELD OF THE INVENTION

[0004] This invention relates generally to the field of energy storage devices. In particular, the present invention relates to the controlled deposition of smooth and conformal thin metal films on high-surface-area carbon nanostructures. This invention further relates to the use of these nanostructures for supercapacitor electrodes.

[0005] II. BACKGROUND OF THE...

Claims

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