Experimental study demonstrates suppressed self-discharge in hybrid supercapacitors using polymer-nanotube electrodes and iodide electrolyte, highlighting improved stability over activated carbon.
This paper reports on the application of poly (3,4‐ethylenedioxythiophene)/carbon nanotubes (PEDOT/CNT) material for the construction of a hybrid supercapacitor utilizing iodide redox‐active electrolyte. To address the advantages in terms of electrochemical performance, comparison has been made to the system using conventional activated carbon (AC) electrodes. Despite limited specific surface area of the polymer‐based material, the PEDOT/CNT cell demonstrates reasonably high electrical parameters ( vs . highly porous AC), especially those normalized per volume or total mass of the device. Interestingly, it also exhibits more stable self‐discharge characteristics over operation time which shall be assigned to smaller fraction of free polyiodides generated in the cell in the presence of the low‐surface‐area polymer electrode, in addition to their strong confinement in the polymer network, thus suppressing redox‐shuttling. Pursuing the mechanistic studies, we have managed to detect (using the electrocatalytic WO 3 ‐based voltammetric probe) the presence of undesirable iodates but at lower concentrations in a case of the PEDOT/CNT‐based capacitor.
No takes yet. Share an insight, caveat, or question.
Skunik‐Nuckowska et al. (2021) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: