Polymer Chainmail: Steric Hindrance and Charge Compensation of Anion‐Doped PEDOT to Boost Stress Deformation of Compressible Supercapacitor

Abstract Conducting polymers with high theoretical capacitance and deformability are among the optimal candidates for compressible supercapacitor electrode materials. However, achieving both mechanical electrochemical stabilities in a single remains great challenge. To address this issue, “Polymer Chainmail” is proposed reversible deformation capability enhances stability because of steric hindrance charge compensation effect doped anions. As proof concept, four common anions selected as dopants Poly(3,4‐ethylenedioxythiophene) (PEDOT), their effects on adsorption diffusion H + PEDOT verified using density functional theory calculations. Owing to film formation effect, PEDOT/nitrogen‐doped carbon foam exhibits good properties. Furthermore, composite demonstrates excellent rate performance due suitable anion doping. This finding provides new insights into preparation electrochemically stable conductive polymer‐based