Aqueous Asymmetric Supercapacitors with Pyrenetetraone-Derived Pseudocapacitive Polymer-Functionalized Graphene Cathodes Enabling a 1.9 V Operating Window

Abstract

Aqueous Asymmetric Supercapacitors

Three distinct types of pyrene-4,5,9,10-tetraone (PYT)-based polymers are integrated noncovalently with graphene to serve as cathodic materials in asymmetric supercapacitors, each exhibiting varied electrochemical performance. When paired with annealed Ti₃C₂T_x as the anode, the most optimized assembled asymmetric device achieves a peak energy density of 38.1 Wh kg⁻¹ at a power density of 950 W kg⁻¹. More details can be found in article number 2300217 by Xiaoyan Zhang and co-workers.