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

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 m(2) 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.