Flake-like MoS2 nano-architecture and its nanocomposite with reduced Graphene Oxide for hybrid supercapacitors applications. Issue 13 (September 2020)

• Record Type: Journal Article
• Authors: Sabeeh, Humera; Zulfiqar, Sonia; Aadil, Muhammad; Shahid, Muhammad; Shakir, Imran; Khan, Muhammad Azhar; Warsi, Muhammad Farooq
• Is Part Of: Ceramics international. Volume 46:Issue 13(2020)
• Page Start: 21064
• Page End: 21072
• Publication Date: 2020-09
• Subjects: Flake-like nanoarchitecture -- Specific capacitance -- Electrochemical activity -- Nanocomposite -- Supercapacitor; Ceramics -- Periodicals; Céramique industrielle -- Périodiques; Ceramics; Periodicals; Electronic journals; 666
• DOI: 10.1016/j.ceramint.2020.05.179
• Languages: English
• ISSNs: 0272-8842

Abstract

Abstract: In this article, we have synthesized flake-like MoS2 nanoarchitecture by urea assisted hydrothermal method. To improve the electrical and electrochemical properties of MoS2 nanoarchitecture, we formed its nanocomposite (MoS2 /r-GO) with 10% r-GO. After the addition of 10% r-GO, the nanocomposite shows the electrical conductivity of 1.24 × 10 −1 Sm −1 that is higher than the pure MoS2 (2.2 × 10 −7 Sm −1 ). The prepared nanocomposite also showed higher specific capacitance (441 Fg -1 at 1 Ag -1 ) than the pure MoS2 nanoarchitecture (248 Fg -1 at 1 Ag -1 ). Moreover, nanocomposite lost just 15.8% of its initial capacitance after 1000 charge-discharge cycles. The enhanced electrochemical activity of the nanocomposite is due to its unique flake-like structure and its reduced charge transfer resistance (Rct ~ 23.5 Ω). The 2-D flake-like structure of the electrode increased its contact area with the r-GO matrix and electrolyte. The higher electrical conductivity and specific surface area of the nanocomposite facilitated the faradaic and non-faradic charge storage mechanism. The r-GO matrix not only acted as a capacitive supplement but also facilitated the redox reaction because of its superior electrical conductivity. As the nanocomposite showed CV and CCD profiles in the negative potential window (−1 V to −0.53 V), therefore it has the potential to be used as a negative electrode material for hybrid supercapacitors applications. The observed results revealed the potential of the (MoS2 /r-GO) nanocomposite-based cathode for hybrid supercapacitor applications.