High capacity SiO2-Graphite composite electrodes with chemically incorporated metal MHCFs for electrochemically switched alkaline cation exchange
Bulk metal hexacyanoferrate (MHCF) has been synthesized within the porous microstructure of conductive composite materials using a simple chemical procedure. The composite materials consist of micrometer-size graphite particles encapsulated in a SiO2 solid matrix using a sol-gel technique. A strong...
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Veröffentlicht in: | Journal of the Electrochemical Society 2004, Vol.151 (9), p.87-D92 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | Bulk metal hexacyanoferrate (MHCF) has been synthesized within the porous microstructure of conductive composite materials using a simple chemical procedure. The composite materials consist of micrometer-size graphite particles encapsulated in a SiO2 solid matrix using a sol-gel technique. A strong electrochemical signal from the chemically treated composites is associated with electrochemically switched alkaline-cation exchange. The exchange capacity of these composite electrodes exceeds by more than two orders of magnitude that of thin-film MHCF electrodes of comparable dimensions. The effects of some fabrication parameters on the cation-exchange capacity and on the distribution of the hexacyanoferrate within the composite electrodes are presented. |
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ISSN: | 0013-4651 1945-7111 |
DOI: | 10.1149/1.1776590 |