. . . . . . . . . .    ANM 2010     3rd International Conference on Advanced Nano Materials     12-15 September 2010 - Agadir, Morocco Back    Abstract ANMM144 HYBRID CARBON NANOSTRUCTURES FOR ELECTROCHEMICAL CAPACITOR Ashish Kumar Mishra and S. Ramaprabhu Alternative Energy and Nanotechnology Laboratory (AENL), Nano Functional Materials Technology Centre (NFMTC), Department of Physics, Indian Institute of Technology Madras, Chennai – 600036, India . Recently, carbon based nanostructures have been focussed for different applications due to their novel properties such as high electrical conductivity, high mechanical strength and high surface area. In the present work, we have demonstrated charge storage capacity of modified graphite platelets and hybrid structure of graphite platelets-multiwalled carbon nanotubes (MWNTs). These MWNTs can be used as spacers to reduce the possibility of restacking of graphite platelets and hence increases the possibility of utilization of more surface area of the hybrid carbon nanostructure. Hence high degree of metal oxide decoration can be achieved over these hybrid structure. MWNTs were prepared by catalytic chemical vapor deposition technique and further purified with air oxidation and acid treatment. Graphite was treated with conc. nitric acid and sulphuric acid in the volumetric ratio of 1:3 for 3 days and this modified graphite platelets were further stirred with MWNTs in equal weight ratio to form hybrid nanostructure. Further ruthenium oxide (RuO2) nanoparticles were decorated on this hybrid structure using chemical route followed by calcination. This metal oxide (RuO2)decorated hybrid carbon nanostructure was characterized by using X-ray diffraction, Electron microscopy, Raman spectroscopy and FTIR spectroscopy techniques. The performance of this hybrid structure based nanocomposite as electrochemical capacitor electrodes was analyzed by study of its capacitive , impedance and charge-discharge behaviours using cyclic voltametry and potentiometry techniques and the results have been discussed. . © nanoAC . . . . . . . . . .

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