Constructing porous organic polymer with hydroxyquinoline as electrochemical-active unit for high-performance supercapacitor

• Published in: Polymer (Guilford) 2019-01, Vol.162, p.43-49
• Main Authors: Chen, Jian, Du, Cheng, Zhang, Yan, Wei, Wei, Wan, Liu, Xie, Mingjiang, Tian, Zhengfang
• Format: Article
• Language: English
• Subjects: 8-Hydroxyquinoline; Capacitance; Chemical synthesis; Chloroform; Cycles; Electrochemistry; Electrode materials; Electrodes; Energy storage; Flux density; Hydroxyquinoline; Polymerization; Polymers; Porous materials; Porous polymer; Pseudocapacitance; Stability; Supercapacitors
• ISSN: 0032-3861; 1873-2291
• DOI: 10.1016/j.polymer.2018.12.030

As one type of electrode materials for supercapacitor, porous organic polymer usually suffers from poor rate performance and inferior cycling stability because of the low electrochemical stability. Herein, a porous organic polymer with hydroxyquinoline as electrochemical-active unit is synthesized by one-step polymerization reaction between perylene, 8-hydroxyquinoline and chloroform. The obtained porous polymer owns large surface area (221.4 m2 g−1), porous structure, abundant redox active sites (hydroxyquinoline) and exhibits a superior supercapacitive performance with a high specific capacitance of 522.0 F g−1 (at 1.0 A g−1) and an unprecedented rate capability (65.5% capacitance retention from 1 to 10 A g−1) in a three-electrode configuration. The assembled symmetric supercapacitor based on the designed porous polymer demonstrates a high energy density of 29.8 Wh kg−1 at a power density of 0.16 kW kg−1 in the voltage range 0–1.6 V and good cycling stability of 71.2% capacity retained after 10000 cycles, makes the derived porous polymer a promising electrode material for the high-performance energy storage device. [Display omitted] •PyrOxin-POP with hierarchical porous structure was firstly fabricated.•Hydroxyquinoline as electrochemical-active unit generates pseudocapacitance.•PyrOxin-POP exhibits large capacity of 552 F g−1 and good rate capability of 65.5%.•PyrOxin-POP achieves an unprecedented cycling stability of 71.2% after 10000 cycles.•The symmetric supercapacitor device shows a high energy density of 29.8 Wh kg−1.