Two-Pronged Strategy: Energizing Bifunctional Polyarylamine Ketones in Electrochromic Supercapacitors

With the objective to actualize the lightweight and intelligent criteria in implementation and to extend the application range of high-performance polymers, a selection comprising polyarylamine ketone (PAAK) has been designed and synthesized as electrochromic materials. The remarkable photoelectric function of triphenylamine moieties and high-performance polymer characteristics were appropriately matched. And the synthesis method generalizability was confirmed through several attempts of side-chain substituent adjustment. The benefits of V₂O₅ nanowire ion storage layers in conjunction with the donor-acceptor (D-A) molecular engineering strategy deftly balanced electrochromic and energy storage features. Amongst them, devices employing PAAK-TPPA-OMe retained electrochromic performance subject to a 30,000-second switching. It was accessible to enhance the coloration efficiency to 331.19 cm²/C and reduce coloring time to 1.48 s after optimization. Likewise, PAAK-TPPA-OMe/V₂O₅ ECS yielded an area specific capacitance of 462.3 μF/cm² and an energy density of 146.8 mWh/cm² at a current density of 0.01 mA/cm². It was convinced that such a conception could guide the intelligent integration of high-performance polymer functionalities.