Enhanced performance of carbon/carbon supercapacitors upon graphene addition

Abstract

Graphene has great potential for application in capacitive energy storage devices. In this study, we have investigated the effects of employing reduced graphene oxide (rGO) either as an additional supplement or as a total replacement of carbon black, the current conductive additive used in commercial carbon/carbon supercapacitors. We also examined the impact of incorporating rGO before and during the slurry preparation. Some electrochemical and morphological studies were conducted to compare the rGO and carbon black in performance enhancement for conventional activated carbon-based electrodes. Our results have demonstrated the benefits of incorporating graphene into the current carbon/carbon supercapacitors.

Performance of Carbon-Nickel Composite Coatings on Laser Surface Roughened Aluminum Foils for Supercapacitor Current Collectors

“…5b. Time constants for activatedcarbon-based cells are typically in the range of 2 to 10 s. [20][21][22] The cell assembled with the commercial Al-Carbon has a time constant of 3.92 s. As already shown in our previous study, the laser treatment itself (Al-LT cell) resulted in a higher time constant compared to the Al-Carbon cell (6.15 s). 9 On the other hand, the cell assembled with gold current collectors showed a much lower time constant of 1.36 s, demonstrating a significantly higher power capability.…”