Enhanced supercapacitance of multiwalled carbon nanotubes functionalized with ruthenium oxide

Arabale, Girish; Wagh, Deepali; Kulkarni, M. G.; Mulla, I.S.; Vernekar, S. P.; Vijayamohanan, K.; Rao, Apparao M.

doi:10.1016/s0009-2614(03)00946-1

Cited by 168 publications

(86 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…23 In addition, the surface area inaccessible to electrolyte ions 124 also impedes the capacitance performance of carbon materials, resulting in limited capacitance values of only 40-160 F g À1 for both activated carbon and carbon aerogels, 125 and 10-35 F g À1 for CNTs. 123 Note that these values are strongly dependent on the microtexture of the nanotubes, number of defects, micropore volume, and contamination. It is believed that future research areas in carbon materials are development of carbon electrodes with higher specific surface area, rational pore distribution, and moderate surface modification so as to optimize overall capacitance and conductivity without compromising stability.…”

Section: Carbon Materialsmentioning

confidence: 99%

“…have been intensively studied as ES materials. 123,192,193,209,213,221,223,231,233,234,[245][246][247][248][249][250][251][252][253][254][255][256][257][258][259][260][261][262] The quantity of RuO 2 required in the electrode layer has thereby been reduced significantly, and higher specific capacitances have been achieved, such as 256 201 It is necessary to point out that many investigators utilized a very high annealing temperature to obtain RuO 2 /carbon composites. 247 Obviously, as mentioned previously, high temperature will lead to higher crystallinity, compromising the utilization of RuO 2 .…”

Section: Ruomentioning

confidence: 99%

See 1 more Smart Citation

A review of electrode materials for electrochemical supercapacitors

2012

View full text Add to dashboard Cite

Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n'arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. Questions? Contact the NRC Publications Archive team atPublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information. NRC Publications Archive Archives des publications du CNRCThis publication could be one of several versions: author's original, accepted manuscript or the publisher's version. / La version de cette publication peut être l'une des suivantes : la version prépublication de l'auteur, la version acceptée du manuscrit ou la version de l'éditeur. For the publisher's version, please access the DOI link below./ Pour consulter la version de l'éditeur, utilisez le lien DOI ci-dessous. NRC Publications Record / Notice d'Archives des publications de CNRC:http://nparc.cisti-icist.nrc-cnrc.gc.ca/eng/view/object/?id=72117dd4-3024-4aa6-be53-472cfb3e5a2a http://nparc.cisti-icist.nrc-cnrc.gc.ca/fra/voir/objet/?id=72117dd4-3024-4aa6-be53-472cfb3e5a2a In this critical review, metal oxides-based materials for electrochemical supercapacitor (ES) electrodes are reviewed in detail together with a brief review of carbon materials and conducting polymers. Their advantages, disadvantages, and performance in ES electrodes are discussed through extensive analysis of the literature, and new trends in material development are also reviewed. Two important future research directions are indicated and summarized, based on results published in the literature: the development of composite and nanostructured ES materials to overcome the major challenge posed by the low energy density of ES (476 references).

show abstract

Section: Carbon Materialsmentioning

confidence: 99%

Section: Ruomentioning

confidence: 99%

A review of electrode materials for electrochemical supercapacitors

2012

View full text Add to dashboard Cite

show abstract

“…32,33 The values of specific capacitance reported for manganese oxide in the literature range between 150 and 250 F/g. [16][17][18][19][20][21][22][23][24][25]34 These values are far from the theoretical value, ca.…”

mentioning

confidence: 99%

Performance of Manganese Oxide/CNTs Composites as Electrode Materials for Electrochemical Capacitors

Raymundo-Piñero

Khomenko

Frąckowiak

et al. 2005

J. Electrochem. Soc.

385

238

View full text Add to dashboard Cite

Nanocrystalline metal oxides can be prepared with large surface area, electrochemical stability, and pseudocapacitive behavior, being able to be used as supercapacitor electrodes. Among the various metal oxides studied, amorphous and hydrated manganese oxide (a-MnO 2 •nH 2 O) is the most promising for supercapacitor electrodes due to the low cost of the raw material. In the present work, amorphous manganese dioxide (a-MnO 2 •nH 2 O) is prepared by chemical co-precipitation of Mn͑VII͒ and Mn͑II͒ in water medium, giving small particles of relatively high surface area. Carbon nanotubes ͑CNTs͒ are proposed as an alternative additive of carbon black for improving the electrical conductivity of the manganese oxide electrodes used to build capacitors. The results demonstrate that CNTs are effective for increasing the capacitance and improving the electrochemical properties of the a-MnO 2 •nH 2 O electrodes which show a better capacitive behavior than with carbon black. This enhancement is due to the high entanglement of CNTs which form a network of open mesopores, allowing the bulk of MnO 2 to be easily reached by the ions. The performance optimization requires a careful control of the electrolyte pH in order to avoid the irreversible reactions Mn͑IV͒ to Mn͑II͒ at the negative electrode and Mn͑IV͒ to Mn͑VII͒ at the positive one.

show abstract

“…Consequently, the metal oxide coatings on acidtreated CNTs were often nonuniform, although they provided better interaction in comparison with pristine CNTs. Despite these drawbacks, most researchers have used such acid-treated CNTs for various metal oxide coatings, including SnO 2 [160,161,[163][164][165], TiO 2 [159,[166][167][168], RuO 2 [169,170], CeO 2 [162], NiO [171], and mixed oxides [172].…”

Section: Covalentmentioning

confidence: 99%

“…the electrochemical stability of transition metal oxides makes them a better choice, provided they are highly conducting. A wide range of oxides has been investigated for use in CNT hybrids, including NiO [171,232,233], MnO 2 [234][235][236][237], V 2 O 5 [238,239], and RuO 2 [169,192,194]. In all of these studies, the synergistic effects of CNT oxide hybrids have shown a considerable improvement of the otherwise poor electric properties and deficient charge transfer channels of the pure oxide.…”

Section: Supercapacitors and Batteriesmentioning

confidence: 99%