Title: Process for producing carbon foams for energy storage devices

Abstract

A high energy density capacitor incorporating a variety of carbon foam electrodes is described. The foams, derived from the pyrolysis of resorcinol-formaldehyde and related polymers, are high density (0.1 g/cc-1.0 g/cc) electrically conductive and have high surface areas (400 m.sup.2 /g-1000 m.sup.2 /g). Capacitances on the order of several tens of farad per gram of electrode are achieved.

Inventors:

Kaschmitter, James L ^[1]; Mayer, Steven T ^[2]; Pekala, Richard W ^[3]

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+ Show Inventor Affiliations

1. Pleasanton, CA
2. San Leandro, CA
3. Pleasant Hill, CA

Issue Date:

Thu Jan 01 00:00:00 EST 1998

Research Org.:

Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)

OSTI Identifier:

871754

Patent Number(s):

5789338

Assignee:

Regents of University of California (Oakland, CA)

Patent Classifications (CPCs):

C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

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C - CHEMISTRY C04 - CEMENTS C04B - LIME, MAGNESIA

C04B2111/00844 - {for electronic applications}
C04B35/52 - based on carbon, e.g. graphite
C04B38/0022 - {obtained by a chemical conversion or reaction other than those relating to the setting or hardening of cement-like material or to the formation of a sol or a gel, e.g. by carbonising or pyrolysing preformed cellular materials based on polymers, organo-metallic or organo-silicon precursors}
C04B38/0045 - {by a process involving the formation of a sol or a gel, e.g. sol-gel or precipitation processes}

C - CHEMISTRY C08 - ORGANIC MACROMOLECULAR COMPOUNDS C08G - MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS

C08G8/04 - of aldehydes
C08G8/20 - with polyhydric phenols

H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01G - CAPACITORS

H01G11/26 - characterised by the structures of the electrodes, e.g. multi-layered, shapes, dimensions, porosities or surface features
H01G11/34 - characterised by carbonisation or activation of carbon

Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION

Y02E60/13 - Ultracapacitors, supercapacitors, double-layer capacitors

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DOE Contract Number:  

W-7405-ENG-48

Resource Type:

Patent

Country of Publication:

United States

Language:

English

Subject:

process; producing; carbon; foams; energy; storage; devices; density; capacitor; incorporating; variety; foam; electrodes; described; derived; pyrolysis; resorcinol-formaldehyde; related; polymers; cc-1; cc; electrically; conductive; surface; 400; g-1000; capacitances; tens; farad; electrode; achieved; energy density; carbon foam; storage device; energy storage; electrically conductive; storage devices; carbon foams; related polymers; foam electrodes; density capacitor; capacitor incorporating; producing carbon; foam electrode; /502/