https://scholars.lib.ntu.edu.tw/handle/123456789/408999
標題: | Polypyrrole/carbon supercapacitor electrode with remarkably enhanced high-temperature cycling stability by TiC nanoparticle inclusion | 作者: | Weng Y.-T. Tsai C.-B. Ho W.-H. Wu N.-L. |
關鍵字: | Conducting polymer;Cycling stability;Polypyrrole;Supercapacitor;TiC | 公開日期: | 2013 | 卷: | 27 | 起(迄)頁: | 172-175 | 來源出版物: | Electrochemistry Communications | 摘要: | In the potential applications for electric vehicle and stand-alone renewable energy storage, supercapacitors are likely to constantly operate at elevate temperatures, and yet the study on high-temperature cycling behavior of conducting polymer-containing supercapactors is scarce. Polypyrrole (PPy) film, doped with p-toluenesulfonate, has been coated onto activated carbon (AC) electrode preform. Although the specific capacitance of the electrode is doubled, from 176 F/g to 352 F/g, with coating of 17.7 wt.% PPy, the capacitance lost nearly 60% after 10,000 cycles at 40 ¢XC, in contrast to 20% loss at 25 ¢XC. It is demonstrated that the problem of accelerated fading at high temperature is effectively alleviated, in conjunction with significant (up to 50%) improvement in power performance, by embedding conductive TiC nanoparticles within the PPy layer via co-electroplating. With addition of 1.7 wt.% of TiC in the composite electrode, the capacitance retains 92% of its initial capacitance under the same cycling condition (40 ¢XC, 10,000 cycles). The enhanced high-temperature cycling stability has in part been attributed to the reduction in the mismatch of thermal expansion coefficient between the conducting polymer layer and the AC substrate. ? 2012 Elsevier B.V. All rights reserved. |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408999 | ISSN: | 13882481 | DOI: | 10.1016/j.elecom.2012.11.025 | SDG/關鍵字: | Composite electrode; Cycling behavior; Cycling conditions; Cycling stability; High temperature; P-toluenesulfonates; Polypyrrole (PPy); Potential applications; Power performance; Renewable energies; Specific capacitance; Super capacitor; Supercapacitor electrodes; Thermal expansion coefficients; TiC; Activated carbon; Capacitance; Conducting polymers; Electric vehicles; Electrolytic capacitors; Nanoparticles; Titanium carbide; Polypyrroles |
顯示於: | 化學工程學系 |
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