Hydroxymethyl PEDOT microstructure-based electrodes for high-performance supercapacitors

The development of conducting polymer-based supercapacitors offers remarkable advantages, such as good ionic and electronic conductivity, ease synthesis, low processing cost, mechanical flexibility. 3,4-ethylenedioxythiophene (PEDOT) is a polymer with robust chemical environmental stability during storage operation in an aqueous environment. Yet, improving its electrochemical capacitance cycle life remains challenge for high-performance exceeding the current state-of-the-art. fabrication PEDOT composites carbon nanomaterials metal oxides commonly used approach to enhance stability. This work discusses comparative study fabricate highly stable derivative electrodes specific via straightforward polymerization technique. hydroxymethyl (PEDOTOH) doped perchlorate dichloromethane (DCM) solvent (197 F g ?1 ) exhibits superior performance compared formed solution (124 ). Furthermore, electropolymerized PEDOTOH on flexible Au/Kapton substrates was assembled into free-standing symmetrical supercapacitor agarose additive-free gel. use gel electrolytes can offer easy handling, no leakage, moderate flexibility miniaturization integration. reached 36.96 at density 13.7 A , energy 14.96 Wh kg power 22.2 kW among highest values reported PEDOT-based supercapacitors. self-standing achieves industry-par retention ?98% after 10000 charge/discharge cycles 10 . provides insights effect solvents electropolymerization modes structure properties toward devices.