Pore Size Effect on Improvement of Surface Proton Conductivity for Three-Dimensionally Ordered Macroporous Silica Composite Membrane
| Autor: | Hirokazu Munakata, Sho Ochiai, Kiyoshi Kanamura |
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| Rok vydání: | 2007 |
| Předmět: |
chemistry.chemical_classification
Conductive polymer Materials science Proton Renewable Energy Sustainability and the Environment Polymer Electrolyte Conductivity Sulfonic acid Condensed Matter Physics Surfaces Coatings and Films Electronic Optical and Magnetic Materials chemistry Chemical engineering Polymer chemistry Materials Chemistry Electrochemistry Composite membrane Order of magnitude |
| Zdroj: | Journal of The Electrochemical Society. 154:B871 |
| ISSN: | 0013-4651 |
| DOI: | 10.1149/1.2747345 |
| Popis: | A composite membrane composed of a three-dimensionally ordered macroporous (3DOM) silica matrix and a proton conducting polymer electrolyte was prepared. The proton conductivity of the composite membrane was successfully improved by introduction of sulfonic acid groups on the 3DOM silica surface. On decreasing pore size of the 3DOM silica matrix, a greater improvement of proton conductivity was observed. 1 X 10 -2 S cm -1 (470 nm pore) or 2.6 X 10 -2 S cm -1 (200 nm pore) improvement was attained for the composite membranes filled with 2-acrylamido-2-methyl-l-propanesulfonic acid (AMPS) polymer. These values are two orders of magnitude larger than those expected from the amount of sulfonic acid groups introduced on the 3DOM silica surfaces. This result suggests a formation of new proton conducting paths by an interaction between sulfonic acid groups on the 3DOM silica surface and those in the AMPS polymer electrolyte. |
| Databáze: | OpenAIRE |
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