Electric Double Layer Capacitance Performance of Porous Carbons Prepared by Defluorination of Polytetrafluoroethylene with Potassium
| Autor: | Soshi Shiraishi, Hiroaki Hatori, Yoshio Yamada, Osamu Tanaike, Asao Oya, Tien-Tzu Liang |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Materials science
Polytetrafluoroethylene General Chemical Engineering Potassium chemistry.chemical_element Capacitance Metal chemistry.chemical_compound Polymerization chemistry Chemical engineering visual_art Electrochemistry visual_art.visual_art_medium medicine Organic chemistry General Materials Science Irradiation Electrical and Electronic Engineering Physical and Theoretical Chemistry Carbon Activated carbon medicine.drug |
| Zdroj: | Electrochemical and Solid-State Letters. 5:A283 |
| ISSN: | 1099-0062 |
| DOI: | 10.1149/1.1516909 |
| Popis: | Porous carbons (Brunauer-Emmett-Teller surface area 999 m 2 /g) prepared by defluorination of polytetrafluoroethylene (PTFE) powder with potassium metal showed a very high capacitance of the electrical double layer (229 F/g). Such a high value is considered to be due not only to the contribution of microporosity, but also to the development of mesoporosity. When the original PTFE was subjected to γ-ray irradiation to reduce the polymerization degree, the carbon obtained in the same procedure showed only a slightly higher value (237 F/g). The relationship between the capacitance and pore size was discussed by taking into consideration the results for conventional activated carbon fibers. |
| Databáze: | OpenAIRE |
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