Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode
Asymmetric capacitors with a non-aqueous electrolyte were constructed by using various carbons as negative and positive electrodes in order to study their performance. For asymmetric capacitors where the ratio of the BET surface area, S BET , of the negative carbon electrode to that of the positive...
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| Format: | Article |
| Language: | English |
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SAGE Publishing
2008-09-01
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| Series: | Adsorption Science & Technology |
| Online Access: | https://doi.org/10.1260/0263-6174.26.7.491 |
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| author | Lihong Wang Masahiro Toyoda Michio Inagaki |
| author_facet | Lihong Wang Masahiro Toyoda Michio Inagaki |
| author_sort | Lihong Wang |
| collection | DOAJ |
| description | Asymmetric capacitors with a non-aqueous electrolyte were constructed by using various carbons as negative and positive electrodes in order to study their performance. For asymmetric capacitors where the ratio of the BET surface area, S BET , of the negative carbon electrode to that of the positive carbon electrode was less than 1.7, the capacitance of the electric double layer was strongly governed by the negative carbon electrode. Their rate performance, as evaluated from the ratio of the capacitance at 200 mA to that at 20 mA, C 200 /C 20 , was determined by the mesoporous surface area of the negative carbon electrode. What is important, however, is that the negative carbon electrode in capacitors governs their characteristics, viz. their capacitance and rate performance. This conclusion was arrived at by constructing asymmetric electric double layer capacitors employing carbons with different pore structures as the negative and positive electrodes. The present result provides information which is important in the design of electrodes for electric double layer capacitors. |
| format | Article |
| id | doaj-art-3dfa4b0b3d2144b48128e0ea85704fd1 |
| institution | Kabale University |
| issn | 0263-6174 2048-4038 |
| language | English |
| publishDate | 2008-09-01 |
| publisher | SAGE Publishing |
| record_format | Article |
| series | Adsorption Science & Technology |
| spelling | doaj-art-3dfa4b0b3d2144b48128e0ea85704fd12025-01-02T22:38:06ZengSAGE PublishingAdsorption Science & Technology0263-61742048-40382008-09-012610.1260/0263-6174.26.7.491Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative ElectrodeLihong Wang0Masahiro Toyoda1Michio Inagaki2 Central R & D, Daido Metal Co., Ltd., Maehara, Inuyama 484-0061, Japan Faculty of Engineering, Oita University, Dannoharu, Oita 870-1192, Japan Faculty of Engineering, Aichi Institute of Technology, Yakusa, Toyota 470-0392, JapanAsymmetric capacitors with a non-aqueous electrolyte were constructed by using various carbons as negative and positive electrodes in order to study their performance. For asymmetric capacitors where the ratio of the BET surface area, S BET , of the negative carbon electrode to that of the positive carbon electrode was less than 1.7, the capacitance of the electric double layer was strongly governed by the negative carbon electrode. Their rate performance, as evaluated from the ratio of the capacitance at 200 mA to that at 20 mA, C 200 /C 20 , was determined by the mesoporous surface area of the negative carbon electrode. What is important, however, is that the negative carbon electrode in capacitors governs their characteristics, viz. their capacitance and rate performance. This conclusion was arrived at by constructing asymmetric electric double layer capacitors employing carbons with different pore structures as the negative and positive electrodes. The present result provides information which is important in the design of electrodes for electric double layer capacitors.https://doi.org/10.1260/0263-6174.26.7.491 |
| spellingShingle | Lihong Wang Masahiro Toyoda Michio Inagaki Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode Adsorption Science & Technology |
| title | Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode |
| title_full | Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode |
| title_fullStr | Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode |
| title_full_unstemmed | Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode |
| title_short | Performance of Asymmetric Electric Double Layer Capacitors — Predominant Contribution of the Negative Electrode |
| title_sort | performance of asymmetric electric double layer capacitors predominant contribution of the negative electrode |
| url | https://doi.org/10.1260/0263-6174.26.7.491 |
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