NiCo-MOF composed of small fragments were multi-dimensional reinforced with conductive polyaniline for high performance supercapacitors

Abstract

Herein, polyaniline (PANI) was cleverly assembled on the surface of a novel NiCo-MOF (NCM) to fabricate of NiCo-MOF bridged with polyaniline nanocomposite (NCM/PANI). Conductive polymer PANI can not only improve the conductivity of MOFs, but also connects small fragments together to improve the overall structural quality. Correspondingly to innovative structure is excellent electrochemical performance, the NCM/PANI obtains an excellent specific capacitance of 1323.3 F g−1 at a current density of 2 A g−1 and good rate capability with the capacitance value can maintain 943.3 F g−1 when the current density was amplified by five times. Furthermore, the assembled asymmetric supercapacitor with NCM/PANI and active carbon (AC) as positive and negative electrode respectively achieves a high energy density of 118.9 Wh kg−1 even the power density reached 8000 W kg−1. The study provides a new research perspective for using conductive polymer such as PANI to improve the comprehensive electrochemical performance of MOF-based materials.