Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7729668 | Journal of Power Sources | 2016 | 9 Pages |
Abstract
Activated carbon materials have been playing a significant role in addressing the challenges posed with the ever-increasing demand for alternative clean and sustainable energy technologies. In the present study, a facile strategy is proposed for generating porosity in porous carbons by using carton box as the precursor and eutectic NaOH-KOH melt as the activating agent. The prepared carbon materials have a very high specific surface area up to 2731Â m2Â gâ1 with large pore volume of 1.68Â cm3Â gâ1, which is greater than that of only KOH was used at the same mass ratio. Electrochemical studies based on symmetric supercapacitor devices demonstrating that the NaOH-KOH melt activated porous carbon exhibits significantly improved rate capability in the range of 0.5-75Â AÂ gâ1 despite of the similar specific capacitance with respect to KOH activated carbon at a low current density of 0.5Â AÂ gâ1. The remarkable deviations in capacitive behavior at high current density for the NaOH-KOH melt activated porous carbon and KOH activated samples highlighting the specific surface area is not the only parameter that determines the capacitive performance especially at high charge-discharge rate.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Dewei Wang, Guoli Fang, Tong Xue, Jinfu Ma, Guihong Geng,