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Enhanced supercapacitance of multiwalled carbon nanotubes functionalized with ruthenium oxide

✍ Scribed by Girish Arabale; Deepali Wagh; Mahesh Kulkarni; I.S Mulla; S.P Vernekar; K Vijayamohanan; A.M Rao


Publisher
Elsevier Science
Year
2003
Tongue
English
Weight
394 KB
Volume
376
Category
Article
ISSN
0009-2614

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✦ Synopsis


In this study we report the pseudocapacitive behavior of multiwalled carbon nanotubes (MWNTs) functionalized with hydrous ruthenium oxide in 1 M sulfuric acid for supercapacitor applications. The entangled network of nanotubes which forms open mesopores and their chemical stability with a basal geometry makes them suitable for such applications. Oxidative treatment to generate oxygenated functional groups on the tube-ends and along the sidewalls enables facile derivatization by hydrous ruthenium oxide to enhance the inherent capacitance. A specific capacitance of 80 F/g is obtained after ruthenium oxide functionalization, which is significantly greater than that of pristine MWNTs (30 F/g) in the same medium.


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