Polyaniline nanofiber decorated carbon nanofiber hybrid mat for flexible electrochemical supercapacitor

We have explored facile synthetic approach to fabricate free-standing hybrid mat based on nanostructured polyaniline (PANi) and carbon nanofibre (CNF) mat for binder-free supercapacitor electrode material by taking the merit of pseduocapacitance of PANi nanofibres and double layer capacitance of CNF...

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Bibliographic Details
Published in:Materials chemistry and physics 2020-11, Vol.254, p.123480, Article 123480
Main Authors: Anand, Surbhi, Ahmad, Md Wasi, Ali Al Saidi, Abdullah Khamis, Yang, Duck-Joo, Choudhury, Arup
Format: Article
Language:English
Subjects:
Capacitance
Capacitor
Carbon fibers
Carbon nanofiber mat
Core-shell structure
Electrode materials
Electrodes
Energy density
Flux density
Gravimetric analysis
Nanofibers
Polyaniline nanofibers
Polyanilines
Power density
Supercapacitors
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Summary:We have explored facile synthetic approach to fabricate free-standing hybrid mat based on nanostructured polyaniline (PANi) and carbon nanofibre (CNF) mat for binder-free supercapacitor electrode material by taking the merit of pseduocapacitance of PANi nanofibres and double layer capacitance of CNFs. The results of different spectroscopic analyses indicate successful growth of PANi on CNF surfaces with non-bonding interactions between them. The PANi/CNF hybrid with a core-shell structure, in which PANi nanofibers were grown on the surfaces of CNFs, was observed in the morphological analysis. The PANi/CNF hybrid mat-based electrode demonstrated a maximum gravimetric capacitance of 493.75 F/g at 1 mA/cm2 with excellent cycling stability. The PANi/CNF hybrid showed an energy density of 68.6 Wh/kg, while the energy density retained to 32.2 Wh/kg at 8.3 kW/kg. The above investigation demonstrates a step forward to design and fabricate flexible, high energy density and low-cost supercapacitor devices. Flexible supercapacitor electrode consisting of polyaniline nanofiber/carbon nanofiber hybrid mat exhibit specific capacitance of 493.75 F/g and energy density of 68.6 Wh kg-1/. [Display omitted] •Flexible nanohybrid mat was prepared via polymerization of PANi on CNF surfaces.•Morphological and surface properties of nanohybrids were studied.•As-prepared nanohybrid electrode possesses excellent electrochemical performances.•Nanohybrid show >90% capacitance retention over 5000 cycles.•Energy density of nanohybrid electrode was three times higher than that of pure CNF.
ISSN:0254-0584
1879-3312
DOI:10.1016/j.matchemphys.2020.123480