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Effect of reducing agent on graphene synthesis and its influence on charge storage towards supercapacitor applications
Ramachandran R, Saranya M, , Raghupathy B.P.C, Jeong S.K,
Published in Elsevier BV
Volume: 153
Pages: 22 - 31
A simple chemical route was adopted for the preparation of graphene by chemical reduction route using sodium borohydride (NaBH4) as a reducing agent. A systematic study was done to show the effect of NaBH4 on the reduction and the obtained graphene samples were characterized using X-ray diffraction, Fourier transform spectroscopy, Raman spectroscopy, Atomic force microcopy and High resolution transmission electron microscopy. Better reduction of GO was observed at GO and NaBH4 ratio of 1:10 (denoted as SR1:10). Further, the investigation was emphasized to show the effect of the above GO to reductant ratio on its charge storage properties. Electrochemical measurements were carried out in 6M KOH electrolyte and the results show that the capacitance performance was increased in the order of GO<SR1:8<SR1:4<SR1:12<SR1:10. A high specific capacitance of 284.3F/g was observed for SR1:10 electrode at 5mV/s scan rate could be due to better electrical conductivity of sample. The ratio of GO and NaBH4 was optimized to 1:10 for high degree reduction of graphene, which has higher capacitance towards supercapacitor applications. © 2015 Elsevier Ltd.
About the journal
JournalData powered by TypesetApplied Energy
PublisherData powered by TypesetElsevier BV
Open Access0