Fabrication of 3D ordered needle-like polyaniline@hollow carbon nanofibers composites for flexible supercapacitors

A 3D flexible ordered needle-like polyaniline/hollow carbon nanofiber (HCNFs/PANI) electrodes were prepared to manufacture symmetric supercapacitors by facilely electrospinning and in-situ polymerization method. Moreover, the ordered needle-like polyaniline was perpendicularly grown on inner and out...

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Bibliographic Details
Published in:Chinese chemical letters 2021-08, Vol.32 (8), p.2448-2452
Main Authors: Ni, Xuepeng, Jiang, Yang, Chen, Haoyu, Li, Kunming, Chen, Huifang, Wu, Qilin, Ju, Anqi
Format: Article
Language:English
Subjects:
Electrospinning
Flexible
Hollow carbon nanofibers
Polyaniline
Supercapacitors
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Summary:A 3D flexible ordered needle-like polyaniline/hollow carbon nanofiber (HCNFs/PANI) electrodes were prepared to manufacture symmetric supercapacitors by facilely electrospinning and in-situ polymerization method. Moreover, the ordered needle-like polyaniline was perpendicularly grown on inner and outer surface of HCNFs, which provided more contact area and rapid ion diffusion as well as fast charge transfer between electrodes and electrolytes. [Display omitted] Carbon nanofiber-based supercapacitors have broad prospects in powering wearable electronics owing to their high specific capacity, fast charge/discharge process, along with long-cycling life. Herein, a poly(acrylonitrile-co-β-methylhydrogen itaconate) copolymer was prepared and used to synthesize flexible hollow carbon nanofibers (HCNFs) via an electrospinning method without breaking after multiple bending. Subsequently, the inner and outer surfaces of HCNFs were evenly covered with ordered needle-like polyaniline (PANI) through in-situ polymerization methods to obtain three-dimensional flexible HCNFs/PANI composites, which exhibited a high capacity 1196.7 F/g at 1 A/g and good cycling stability (90.1% retention at 5 A/g after 3000 cycles). The symmetrical supercapacitor based on the HCNFs/PANI composites also delivered an outstanding electrochemical performance with high energy/power density (60.28 Wh/kg at 1000 W/kg) and superior cycling durability (90% capacitance retention after at 5 A/g 3000 cycles), which confirmed that the HCNFs/PANI composites had a wide application potential in flexible energy storage devices.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2021.01.043