Synthesis of polyaniline/graphene composite and its application in zinc-rechargeable batteries

Polyaniline, polyaniline/graphene composites were synthesized by a novel in situ chemical oxidative polymerization method including two oxidants. The morphology and structure of the material were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy...

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Bibliographic Details
Published in:	Journal of solid state electrochemistry 2019-12, Vol.23 (12), p.3373-3382
Main Authors:	Wang, Zhen, Han, Jia-Jun, Zhang, Ning, Sun, Dan-Dan, Han, Tao
Format:	Article
Language:	eng
Subjects:	Analytical Chemistry Borohydrides Characterization and Evaluation of Materials Chemistry Chemistry and Materials Science Condensed Matter Physics Discharge Electrochemical analysis Electrochemical impedance spectroscopy Electrochemistry Electrode materials Electron microscopy Electrons Energy Storage Field emission microscopy Fourier transforms Graphene Infrared spectroscopy Microscopy Morphology Organic chemistry Original Paper Oxidizing agents Particulate composites Physical Chemistry Polyanilines Rechargeable batteries Spectrum analysis Zinc
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Summary:	Polyaniline, polyaniline/graphene composites were synthesized by a novel in situ chemical oxidative polymerization method including two oxidants. The morphology and structure of the material were characterized by field emission scanning electron microscopy (FE-SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FT-IR). The electrochemical performance of polyaniline (PANI)-based composites was tested by electrochemical impedance spectroscopy (EIS), cyclic voltammetry (CV) testing, and constant current charge and discharge (GCD) tests. At 0.2 C of constant current, the discharge specific capacities of PANI/graphene oxide (PANI/GO) and PANI/GO-sodium borohydride (graphene oxide is reduced by sodium borohydride, named PANI/GO-NaBH 4 ) were as high as 183 mAh/g and 192 mAh/g, respectively, which was nearly twice as high as that of PANI (100 mAh/g). After 100 charge and discharge cycles, the capacity retention rates of PANI, PANI/GO, and PANI/GO-NaBH 4 were 80.4%, 89.4%, and 95.05%, respectively; the cycle performance was greatly improved before the modification. These results indicate that the composite has exciting potentials for the cathode material of zinc-rechargeable battery.
ISSN:	1432-8488 1433-0768