Three-Dimensional Carbon Nitride Nanowire Scaffold for Flexible Supercapacitors

Herein, a 3D composite electrode supported by g-C(3)N(4) nanowire framework as scaffold and poly(3,4-ethylenedioxythiophene): poly(4-styrenesulfonate) (PEDOT: PSS) as conducting polymer is reported for flexible solid-state electrochemical capacitors. Compared to pure PEDOT: PSS, the composite electrodes have a greatly increased specific surface and showed good electrochemical performance. A specific capacitance of 202 F g(−1) is achieved, and 83.5% of initial capacitance maintained after 5000 cycles. The device based on the 3D g-C(3)N(4)/PEDOT: PSS electrode also exhibits good performance in capacitance, flexibility, and cycling stability. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1186/s11671-019-2932-z) contains supplementary material, which is available to authorized users.