کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1295216 | 973664 | 2006 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Nomex-derived activated carbon fibers as electrode materials in carbon based supercapacitors Nomex-derived activated carbon fibers as electrode materials in carbon based supercapacitors](/preview/png/1295216.png)
Electrochemical characterization has been carried out for electrodes prepared of several activated carbon fiber samples derived from poly (m-phenylene isophthalamide) (Nomex) in an aqueous solution. Depending on the burn-off due to activation the BET surface area of the carbons was in the order of 1300–2800 m2 g−1, providing an extensive network of micropores. Their capability as active material for supercapacitors was evaluated by using cyclic voltammetry and impedance spectroscopy. Values for the capacitance of 175 F g−1 in sulfuric acid were obtained. Further on, it was observed that the specific capacitance and the performance of the electrode increase significantly with increasing burn-off degree. We believe that this fact can be attributed to the increase of surface area and porosity with increasing burn-off.
Journal: Journal of Power Sources - Volume 153, Issue 2, 28 February 2006, Pages 419–423