Effect of functionalization on the energy storage performance of super capacitors derived from wood charcoal
energy storage; functional groups; structural defects; supercapacitors
The electrochemical performance of wood charcoal is investigated with respect to the disorders in the system after subjecting to oxidation and exfoliation conditions. The Cyclic voltammetry and galvanostatic charge discharge curves indicate an improvement in the electrochemical behavior, resulting in a marginal increase in the specific capacitance values at higher exfoliation temperatures. The improvement is predominantly due to the change in the structural disorder in the system accompanied by the incorporation of oxygen functional groups which act as electrochemical active species. The exfoliation of wood charcoal at 160 and 200C yield a specific capacitance of 6.23 and 12.24 F/g at a current density of 0.01 A/g. The ESR values representing the overall resistance of the system are observed to be 6.07 ? for 200C as opposed to 10.41 ? of the bare material, making the material more conducting. The drastic change in the structural morphology along with the optimal amount of oxygen functional groups can be the reason for this behavior. The acquired results offer useful information for investigating the possibilities of fabricating supercapacitors with wood charcoal by tuning the defects of the system. 2024 American Institute of Chemical Engineers.
Mathew, Elma Elizaba; Balachandran, Manoj
Environmental Progress and Sustainable Energy;Volume;44;Issue;2;Article No.;e14548;
Restricted Access; Hardcopy may be available in the library
https://doi.org/10.1002/ep.14548 https://www.scopus.com/pages/publications/105001069789?origin=resultslist
Mathew E.E., Department of Physics and Electronics, Christ (Deemed to be University), Bangalore, India; Balachandran M., Department of Physics and Electronics, Christ (Deemed to be University), Bangalore, India