Facile synthesis of novel poly(1H-benzoindole)/WO3 nanocomposites with enhanced energy storage capability and its application in high-performance supercapacitor

Key Words:TUNGSTEN-OXIDE; ELECTRODE MATERIAL; DEVICES; HYBRID; NANOSTRUCTURES; POLYINDOLE; POLYMER

Abstract:Poly(1H-benzindole)/tungsten trioxide (PBIn/WO3) nanocomposites are successfully prepared by simple hydrothermal synthesis and electrochemical polymerization. There is a synergistic effect in PBIn and WO3, which can enhance the electrochemical performance and make use of their respective performance advantages to make up for each other's deficiencies. Among them, there is also good energy level matching, which can provide a favorable driving force for charge transfer. Moreover, the capacitive performance and electron migra-tion rate of the composite material are enhanced due to the good electrical conductivity and charge storage capacity of PBIn. Hence, the PBIn/WO3 nanocomposites possess a specific capacitance as high as 535.5F g-1 and enhanced charge transfer rate. Asymmetric supercapacitor devices based on PBIn/WO3 nanocompos-ites and poly(3,4-ethylenedioxythiophene) (PEDOT) are successfully constructed, which show good specific capacitance (122.25F g-1) and cycling stability (81.6 % retention after 3000 cycles). The device exhibits max-imum energy density of 38.2 Wh kg-1 and maximum power density of 966.7 W kg-1. In the future field of energy storage, the PBIn/WO3 nanocomposites prepared in this study may have broad application prospects.

Volume:923

Issue:

Translation or Not:no