Synthesis of Few-Layer MoS2 Nanosheets-Wrapped Polyaniline Hierarchical Nanostructures for Enhanced Electrochemical Capacitance Performance. (10th September 2015)

• Record Type: Journal Article
• Authors: Lei, Junyu; Jiang, Ziqiao; Lu, Xiaofeng; Nie, Guangdi; Wang, Ce
• Is Part Of: Electrochimica acta. Volume 176(2015)
• Page Start: 149
• Page End: 155
• Publication Date: 2015-09-10
• Subjects: Polyaniline -- MoS2 -- Core-sheath -- Electrochemical capacitor -- Cycling stability; Electrochemistry -- Periodicals; Electrochemistry, Industrial -- Periodicals; 541.37
• DOI: 10.1016/j.electacta.2015.07.028
• Languages: English
• ISSNs: 0013-4686

Abstract

Graphical abstract: The scientific motivation of this work is to synthesize a hierarchical core-sheath PANi@MoS2 nanostructure as an advanced electrode material for high-performance electrochemical capacitor applications. Hierarchical core-sheath PANi@MoS2 nanostructure is prepared in a one-pot synthesis via a hydrothermal redox reaction between ammonium tetrathiomolybdate and polyaniline nanofibers. The obtained PANi@MoS2 electrode displays a good electrochemical capacitance performance with a specific capacity of 450 F g −1 under 0.5 M H2 SO4 . More importantly, the core-sheath structure of PANi@MoS2 electrode enhances the structural stability during the electrochemical process and thus improves the electrochemical cycling stability of the electrode significantly, which retains 80% in specific capacity after 2000 charge/discharge processes, higher than 47% of that with individual PANi nanofibers electrode. Abstract: We report a facile strategy to synthesize a hierarchical core-sheath PANi@MoS2 nanocomposite as an advanced electrode material for high-performance electrochemical capacitor applications. Hierarchical core-sheath PANi@MoS2 nanostructure is prepared in a one-pot synthesis via a hydrothermal redox reaction between ammonium tetrathiomolybdate and polyaniline nanofibers. Structural and morphological characterizations of the as-prepared PANi@MoS2 nanocomposite are investigated by Fourier-transform infrared (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectrum (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM) measurements. The obtained PANi@MoS2 electrode displays a good electrochemical capacitance performance with a specific capacitance of 450 F g −1 under 0.5 M H2 SO4 . More importantly, the core-sheath structure of PANi@MoS2 electrode enhances the structural stability during the electrochemical process and thus improves the electrochemical cycling stability of the electrode significantly, which retains 80% in specific capacitance after 2000 charge/discharge processes.