Abstract
Graphenes prepared by three different methods have been investigated as electrode materials in electrochemical supercapacitors. The samples prepared by exfoliation of graphitic oxide and by the transformation of nanodiamond exhibit high specific capacitance in aq. H2SO4, the value reaching up to 117 F/g. By using an ionic liquid, the operating voltage has been extended to 3·5 V (instead of 1 V in the case of aq. H2SO4), the specific capacitance and energy density being 75 F/g and 31·9 Wh kg−1 respectively. This value of the energy density is one of the highest values reported to date. The performance characteristics of the graphenes which are directly related to the quality, in terms of the number of layers and the surface area, are superior to that of single-walled and multi-walled carbon nanotubes.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Conway B E 1999 Electrochemical supercapacitors (New York: Kluwer Academic, Plenum)
Kotz R and Carlen M 2000 Electrochim. Acta 45 2483
Frackowiak E and Beguin F 2001 Carbon 39 937
Qu D and Shi H 1998 J. Power. Sources 74 99
Meyer S T, Pekala R W and Kaschmitter J L 1993 J. Electrochem. Soc. 140 446
Niu C M, Sichel E K, Hoch R, Moy D and Tennent H 1997 Appl. Phys. Lett. 70 1480
Frackowiak E, Metenier K, Bartagna V and Beguin V 2000 Appl. Phys. Lett. 77 2421
An K H, Kim W S, Park Y S, Choi Y C, Lee S M, Chung D, Bae D J, Lim S C and Lee Y 2001 Adv. Mater. 13 497
Du C, Yeh J and Pan N 2005 Nanotechnology 16 350
Yoon S, Lee J, Hyeon T and Oh S M 2000 J. Electrochem. Soc. 147 2507
Chimola J, Yushin G, Gogotsi Y, Portet C, Simon P and Taberna P L 2006 Science 313 1760
Novosolev K S, Geim A K, Morozov S V, Jiang D, Zhang Y, Dubonos S V, Grigorieva I V and Firsov A A 2004 Science 306 666
Geim A K and Novosolev K S 2007 Nat. Mater. 6 183
Subrahmanyam K S, Vivekchand S R C, Govindaraj A and Rao C N R 2008 J. Mater. Chem. (in press).
Balducci A, Henderson W A, Mastragostino M, Passerini S, Simon P and Soavi F 2005 Electrochim. Acta 50 2233
Schniepp H C, Li J-L, McAllister M J, Sai H, Herrera-Alonso M, Adamson D H, Prud’homme R K, Car R, Saville D A and Aksay I A 2006 J. Phys. Chem. B110 8535
Andersson O, Prasad B L V, Sato H, Enoki T, Hishiyama Y, Kaburagi Y, Yoshikawa M and Bandow S Phys. Rev. B58 16387
Somani P R, Somani S P and Umeno M 2006 Chem. Phys. Lett. 430 56
Vivekchand S R C, Jayakanth R, Govindaraj A and Rao C N R 2005 Small 1 920
Balducci A, Dugas R, Taberna P L, Simon P, Plee D, Mastragonstino M and Passerini S 2007 J. Power Sources 165 922
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Vivekchand, S.R.C., Rout, C.S., Subrahmanyam, K.S. et al. Graphene-based electrochemical supercapacitors. J Chem Sci 120, 9–13 (2008). https://doi.org/10.1007/s12039-008-0002-7
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12039-008-0002-7