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Effects of Processing Conditions on the Physical and Electrochemical Properties of Carbon Aerogel Composites

Published online by Cambridge University Press:  10 February 2011

T. D. Tran ,
D. Lenz ,
K. Kinoshita  and
M. Droege
T. D. Tran
Affiliation:
Chemistry & Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550
D. Lenz
Affiliation:
Chemistry & Materials Science Department, Lawrence Livermore National Laboratory, Livermore, CA 94550
K. Kinoshita
Affiliation:
Energy and Environmental Division, Lawrence Berkeley National Laboratory, Berkeley, CA 94720
M. Droege
Affiliation:
Ocellus, Inc., 887 A Industrial Road, San Carlos, CA 94070
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Abstract

The carbon aerogel/carbon paper composites have physical properties similar to those of monolithic carbon aerogels but do not require supercritical extraction during fabrication. The resorcinol-formaldehyde based carbon aerogel phase is intertwined between the fibers of a commercial carbon paper. The resulting composites have variable densities (0.4–0.6 g/cc), high surface areas (300–600 m2/g), and controllable pore sizes and pore distribution. The effects of the resorcinol-formaldehyde concentrations (50–70% w/v) and the pyrolysis temperature (600–1050°C) were studied in an attempt to tailor the aerogel microstructure and properties. The composite physical properties and structure were analyzed by transmission electron microscopy and multipoint-BET analyses and related to electrochemical capacitive data in 5M KOH. These thin carbon aerogel/carbon paper composite electrodes are used in experiments with electrochemical double-layer capacitors and capacitive deionization.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 496: Symposium Y – Materials For Electrochemical Energy Storage & Conversion II… , 1997 , 607
Copyright
Copyright © Materials Research Society 1998

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References

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