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Controlled electrodeposition of nanoparticles

a nanoparticle and electrodeposition technology, applied in the field of activated carbons, can solve the problems of marginal or unacceptable performance of current technology, too high cost, and each approach has significant limitations, and achieve the effect of enhancing the rugosity and proximate exterior, and enhancing the rugosity of the carbon surfa

Inactive Publication Date: 2010-05-27
UNIV OF KENTUCKY RES FOUND
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  • Abstract
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Benefits of technology

[0013]In yet another embodiment, there is a method of preparing a mesoporous carbon with enhanced rugosity and proximate exterior. Metal ions are electrodeposited on a surface of the carbon to form nanoparticles on the surface of the carbon. If the carbon is a carbon precursor, the precursor is carbonized to form a carbon. The carbon may be activated by catalytically activating the carbon in air and an inert gas to form a catalytically activated carbon, where the mass of the catalyti

Problems solved by technology

Much research has been devoted to this area, but for many practical applications such as hybrid electric vehicles, fuel cell powered vehicles, and electricity microgrids, the current technology is marginal or unacceptable in performance and too high in cost.
Each of these approaches has significant limitations.

Method used

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  • Controlled electrodeposition of nanoparticles
  • Controlled electrodeposition of nanoparticles
  • Controlled electrodeposition of nanoparticles

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Embodiment Construction

[0020]Enhanced methods of engineered nanoparticle deposition on carbon and conductive carbon precursors have been discovered and are described herein. General nanoparticle catalytic activation means enhancing the rugosity and proximate exterior of carbon materials have been described in U.S. patent application Ser. No. 11 / 211,894, filed Aug. 5, 2005, and U.S. patent application Ser. No. 12 / 070,062, filed Feb. 14, 2008, the entire contents of each are incorporated herein by reference, except that in the event of any inconsistent disclosure or definition from the present application, the disclosure or definition herein shall be deemed to prevail. Throughout this description and in the appended claims, the following definitions are to be understood:

DEFINITIONS

[0021]The term “rugosity” used in reference to carbons refers to the difference between actual surface area and theoretical geometric area in accordance with the definition in the IUPAC Compendium of Chemical Terminology, 2nd edit...

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Abstract

Deposition of nanoparticles onto carbon surfaces is described. Metal and / or metal oxide ions are deposited on a carbon surface by electrodeposition, such as by immersing a carbon and an anode in a salt bath, and applying a number of electrical pulses having a defined pulse width. The size, coverage density, and metallic composition of the nanoparticles may be affected by the pulse width of the electrical pulses, the number of electrical pulses, and the chemical composition of the salt bath, respectively. The carbon may be anodized before electrodeposition. If the carbon is a carbon precursor, after electrodeposition, the carbon precursor is carbonized to form a carbon. After electrodeposition, the carbon may be activated to form an activated carbon. The nanoparticles may serve as catalysts for activation rugosity of mesoporous carbons. The catalytically activated carbon materials may be used in all manner of devices that contain carbon materials.

Description

TECHNICAL FIELD[0001]The present invention relates to activated carbons and to methods for their preparation. The activated carbons may be used in all manner of devices that may contain activated carbon materials, including but not limited to various electrochemical devices (e.g., capacitors, batteries, fuel cells, and the like), hydrogen storage devices, filtration devices, catalytic substrates, and the like.BACKGROUND OF THE INVENTION[0002]In many emerging technologies, such as electric vehicles and hybrids thereof, there exists a need for capacitors with both high energy and high power densities. Much research has been devoted to this area, but for many practical applications such as hybrid electric vehicles, fuel cell powered vehicles, and electricity microgrids, the current technology is marginal or unacceptable in performance and too high in cost. See DOE Progress Report for Energy Storage Research and Development fy2005 (January 2006) and Utility Scale Electricity Storage by ...

Claims

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Application Information

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IPC IPC(8): C25D5/18C25D5/54C25B1/00
CPCC25D5/54C25D13/02C25D13/20C25D13/18C25D13/12C25D5/56
Inventor ISTVAN, RUDYARD LYLELIPKA, STEPHEN M.
Owner UNIV OF KENTUCKY RES FOUND
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