Direct synthesis of graphene-templated microporous carbon for supercapacitor applications

M.S.L. Hudson
Annai Vailankanni College of Engineering,
India

Keywords: graphene-templated, microporous carbon, micropore analyses, BET, isotherm

Summary:

Microporous materials for energy storage and gas storage are becoming increasingly important owing to their potential applications in industries and commercial products. Here, we report the synthesis of graphene-templated microporous carbon particle through a cost effective technique named as camphor assisted combustion of graphite oxide (GO). The structure and microstructure analysis of graphene-templated microporous carbon particle were analyzed through XRD, TEM, SEM and Raman spectra. Furthermore, the pore structure of samples were analyzed using BET method. It has been observed that the specific surface area and porosity of samples decreases when increasing the concentration of camphor during the synthesis process. The low pressure N2 and Ar isotherm measured at 77 K and 87 K, respectively suggest that the optimum sample (derived using 1:12 mass ratio of camphor and GO) has a specific BET surface area of ~ 600 m2g-1 and has a pore volume of 0.44 cm3g-1. The optimum graphene-templated microporous carbon particle obtained from 1:12 mass ratio of camphor and GO exhibit a high specific capacitance of 241 F g-1 at the constant current density of 2 A g-1 with capacitance retention of about 98 % after 1000 galvanostatic charge-discharge cycles. The synthesis, characterization and supercapacitor application of graphene-templated microporous carbon particles using camphor assisted combustion process will be discussed in detail.