A comparison of the electrochemical behavior of carbon aerogels and activated carbon fiber cloths

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Electrochemical capacitative behavior of carbon aerogels and commercial carbon fiber cloths was studied in 5M KOH, 3M sulfuric acid, and 0.5M tetrethylammonium tetrafluoroborate/propylene carbonate electrolytes. The resorcinol-formaldehyde based carbon aerogels with a range of denisty (0.2-0.85 g/cc) have open-cell structures with ultrafine pore sizes (5-50 nm), high surface area (400-700 m{sup 2}/g), and a solid matrix composed of interconnected particles or fibers with characteristic diameters of 10 nm. The commercial fiber cloths in the density range 0.2-04g/cc have high surface areas (1000-2500 m{sup 2}/g). The volumetric capacitances of high-density aerogels are shown to be comparable to or exceeding those from ... continued below

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7 p.

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Tran, T.D.; Alviso, C.T.; Hulsey, S.S.; Nielsen, J.K. & Pekala, R.W. May 10, 1996.

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Description

Electrochemical capacitative behavior of carbon aerogels and commercial carbon fiber cloths was studied in 5M KOH, 3M sulfuric acid, and 0.5M tetrethylammonium tetrafluoroborate/propylene carbonate electrolytes. The resorcinol-formaldehyde based carbon aerogels with a range of denisty (0.2-0.85 g/cc) have open-cell structures with ultrafine pore sizes (5-50 nm), high surface area (400-700 m{sup 2}/g), and a solid matrix composed of interconnected particles or fibers with characteristic diameters of 10 nm. The commercial fiber cloths in the density range 0.2-04g/cc have high surface areas (1000-2500 m{sup 2}/g). The volumetric capacitances of high-density aerogels are shown to be comparable to or exceeding those from activated carbon fibers. Electrochemical behavior of these materials in various electrolytes is compared and related to their physical properties.

Physical Description

7 p.

Notes

OSTI as DE96011899

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  • Spring meeting of the Materials Research Society (MRS), San Francisco, CA (United States), 8-12 Apr 1996

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  • Other: DE96011899
  • Report No.: UCRL-JC--123970
  • Report No.: CONF-960401--51
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 242624
  • Archival Resource Key: ark:/67531/metadc667193

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  • May 10, 1996

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  • June 29, 2015, 9:42 p.m.

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  • Feb. 23, 2016, 1:20 p.m.

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Tran, T.D.; Alviso, C.T.; Hulsey, S.S.; Nielsen, J.K. & Pekala, R.W. A comparison of the electrochemical behavior of carbon aerogels and activated carbon fiber cloths, article, May 10, 1996; California. (digital.library.unt.edu/ark:/67531/metadc667193/: accessed November 22, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.