Methods for and products of processing nanostructure nitride, carbonitride and oxycarbonitride electrode power materials by utilizing sol gel technology for supercapacitor applications

Patent · Sun Dec 31 23:00:00 EST 2000

OSTI ID:873470

Huang, Yuhong ^[1]; Wei, Oiang ^[1]; Chu, Chung-tse ^[2]; Zheng, Haixing ^[3]

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1. West Hills, CA
2. Chatsworth, CA
3. Oak Park, CA

Metal nitride, carbonitride, and oxycarbonitride powder with high surface area (up to 150 m.sup.2 /g) is prepared by using sol-gel process. The metal organic precursor, alkoxides or amides, is synthesized firstly. The metal organic precursor is modified by using unhydrolyzable organic ligands or templates. A wet gel is formed then by hydrolysis and condensation process. The solvent in the wet gel is then be removed supercritically to form porous amorphous hydroxide. This porous hydroxide materials is sintered to 725.degree. C. under the ammonia flow and porous nitride powder is formed. The other way to obtain high surface area nitride, carbonitride, and oxycarbonitride powder is to pyrolyze polymerized templated metal amides aerogel in an inert atmosphere. The electrochemical capacitors are prepared by using sol-gel prepared nitride, carbonitride, and oxycarbonitride powder. Two methods are used to assemble the capacitors. Electrode is formed either by pressing the mixture of nitride powder and binder to a foil, or by depositing electrode coating onto metal current collector. The binder or coating is converted into a continuous network of electrode material after thermal treatment to provide enhanced energy and power density. Liquid electrolyte is soaked into porous electrode. The electrochemical capacitor assembly further has a porous separator layer between two electrodes/electrolyte and forming a unit cell.

• Research Organization: Chemat Technology, Inc. (Northridge, CA)
• DOE Contract Number: FG03-93ER81570
• Assignee: Chemat Technology, Inc. (Northridge, CA)
• Patent Number(s): US 6168694
• OSTI ID: 873470
• Country of Publication: United States
• Language: English

Related Subjects

/204/106/148/205/361/423/501/
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aerogel
alkoxides
amides
ammonia
amorphous
applications
assemble
assembly
atmosphere
binder
capacitor
capacitor applications
capacitors
carbonitride
cell
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collector
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continuous
converted
current
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degree
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enhanced
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flow
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form
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hydrolysis
hydroxide
inert
inert atmosphere
layer
ligands
liquid
liquid electrolyte
material
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metal
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metal current
metal nitride
metal organic
methods
mixture
modified
nanostructure
network
nitride
nitride electrode
nitride powder
obtain
organic
organic ligand
organic precursor
oxide material
oxide materials
oxycarbonitride
polymerized
porous
porous electrode
porous separator
powder
power
power density
precursor
prepared
pressing
process
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provide
provide enhanced
pyrolyze
removed
separator
separator layer
sintered
soaked
sol
sol-gel
sol-gel process
solvent
supercapacitor
supercritically
surface
synthesized
technology
templated
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thermal
thermal treatment
treatment
unhydrolyzable
unit
unit cell
utilizing
utilizing sol
wet