Facile synthesis of polypyrrole/carbon-coated MoO3 nanoparticle/graphene nanoribbon nanocomposite with high-capacitance applied in supercapacitor electrode

• Published in: Journal of materials science. Materials in electronics 2018, Vol.29 (1), p.382-391
• Main Authors: Hsu, Feng-Hao, Wu, Tzong-Ming
• Format: Article
• Language: English
• Subjects: Characterization and Evaluation of Materials; Chemistry and Materials Science; Materials Science; Optical and Electronic Materials
• ISSN: 0957-4522; 1573-482X
• DOI: 10.1007/s10854-017-7927-x

The core–shell structure of carbon-coated MoO 3 (C#MoO 3 ) nanoparticles have been prepared by using a simple hydrothermal synthesis and using in situ method to fabricate the high performance nanocomposite with polypyrrole (PPy) and graphene nanoribbon (GNR). The chemical and structural of the samples were characterized by using Fourier transform infrared (FTIR), Raman, and X-ray diffraction. The morphology of C#MoO 3 nanoparticle and its nanocomposite was also observed by using high-resolution transmission electron microscopy. The electrochemical performance of prepared PPy/C#MoO 3 nanoparticle/GNR nanocomposite not only present the high specific capacitance (991 F g −1 ) at 5 mV s −1 scan rate in a 1 M H 2 SO 4 electrolyte but also shows the high retention (92.1%) of capacitance after 1000 charge/discharge cycles. Electrochemical impedance spectroscopy test for PPy/C#MoO 3 nanoparticle/GNR nanocomposite also shows the very low charge-transfer resistance. These superior properties significantly show that the C#MoO 3 nanoparticle used to fabricate the nanocomposite can further improve the specific capacitance and cycle stability. Here this paper also provides a low cost and facile process to fabricate the high performance nanocomposite as a promising electrode material for supercapacitor.