An Ultrafast, High‐Loading, and Durable Poly(p‐aminoazobenzene)/Reduced Graphene Oxide Composite Electrode for Supercapacitors
Zhiting Ai, Lü Li, Muyun Huang, Xiaofang Su, Yanan Gao, Jifeng Wu
Abstract
Abstract Although challenging, the fabricated supercapacitor electrodes with excellent rate capability, long cycling stability, and high mass‐loading are crucial for practical applications. Herein, a novel 3D porous poly(p‐aminoazobenzene)/reduced graphene oxide hydrogel is designed and prepared as an ultrafast, high‐loading, and durable pseudocapacitive electrode through a facile two‐step self‐assembly approach. Owing to abundant stable redox‐active sites, fast electrolyte diffusion, and efficient charge conduction, the PRH electrode (5 mg cm −2 ) shows a high specific capacitance (701 F g −1 at 2 A g −1 ) and ultrafast rate (97% capacitance retention at 100 A g −1 ). Furthermore, even with a mass‐loading of 10 mg cm −2 , the electrode still exhibits comparable high performance and excellent long‐term cycling life (only 6.7% capacitance loss after 10 000 cycles). This work demonstrates novel polyaniline analog composites for constructing novel electrodes, promising to open an avenue toward practical applications.