Effect of morphology and phase engineering of MoS2 on electrochemical properties of carbon nanotube/polyaniline@MoS2 composites

Juguo Dai; Yan Lv; Jiatian Zhang; Dandan Zhang; Hongmei Xie; Chuanluan Guo; Aoqi Zhu; Yiting Xu; Mizi Fan; Conghui Yuan; Lizong Dai

doi:10.1016/j.jcis.2021.01.051

Effect of morphology and phase engineering of MoS₂ on electrochemical properties of carbon nanotube/polyaniline@MoS₂ composites

J Colloid Interface Sci. 2021 May 15:590:591-600. doi: 10.1016/j.jcis.2021.01.051. Epub 2021 Jan 27.

Authors

Juguo Dai¹, Yan Lv¹, Jiatian Zhang¹, Dandan Zhang¹, Hongmei Xie¹, Chuanluan Guo¹, Aoqi Zhu¹, Yiting Xu², Mizi Fan³, Conghui Yuan¹, Lizong Dai¹

Affiliations

¹ Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, 361005, China.
² Fujian Provincial Key Laboratory of Fire Retardant Materials, College of Materials, Xiamen University, Xiamen, 361005, China. Electronic address: xyting@xmu.edu.cn.
³ College of Engineering, Design and Physical Science, Brunel University London, UB8 3PH, United Kingdom.

PMID: 33581662
DOI: 10.1016/j.jcis.2021.01.051

Abstract

This paper rationally designs the morphology and phase structure of carbon nanotube/polyaniline@MoS₂ (CNT/PANI@MoS₂) composites, with MoS₂ conductive wrapping growing vertically on the outer layer of the composites via hydrothermal method. The crystalline nature and chemical properties are characterized by X-ray diffraction (XRD), Flourier transformation infrared spectroscopy (FT-IR), Raman spectroscopy (Raman), X-ray photoelectron spectroscopy (XPS). Morphology and microstructures are determined by Scanning electric microscopy (SEM), Transmission electron microscope (TEM) and Brunauer-Emmett-Teller (BET). The developed composites possess excellent electrochemical properties (the specific capacitance is substantially increased by ~119%, reaching 700.0 F g^-1 after wrapping by MoS₂) and good cycling stability (after over 5000 cycles retains 80.8% capacitance) in three-electrode systems, which indicating that the unique morphology of MoS₂ shells endow the channels to composites for rapid charge transport and ionic diffusion. Furthermore, symmetric supercapacitors devices assembled with the CNT/PANI@MoS₂ composites achieve specific capacitance of 459.7 F g^-1 at 1 A g^-1, capacitance retention is 97.4% after 10,000 cycles and reach superior energy density of 40.9 Wh kg^-1 at the power density of 400 W kg^-1. This strategy of three-dimensional wrapping method may open up a new potential to relieve the dilemma of degraded performance of supercapacitor, while improving the capacitance and stability for supercapacitors.

Keywords: MoS(2); Symmetric supercapacitors devices; Three-dimensional wrapping.