Researchers at the India Institute of Technology, Kharagpur, have developed a new graphene, silver and pyyrole nanocomposite material suitable for making supercapacitors.
The nanomaterial was made of a graphene sheet onto which silver nanoparticles, each about 15-20 nanometers wide, had been embedded uniformly. The material was shown to have a high specific capacitance of 472 farad per gram at a current density of 0.5 amperes per gram. It could retain 95% of its capacitance after 1,000 consecutive charge-discharge cycles.
Obtaining a capacity of 472 Farad per gram is good as per global standards, an unrelated researcher who examined the results of this study explained. It is fascinating how the incorporation of silver nanoparticles opens up the possibility of making smart supercapacitors, where the nanoparticles produce light by a phenomenon called surface plasmonic emission and thus indicate how much charge is left in the supercapacitor.