Layer-structured nanohybrid MoS2@rGO on 3D nickel foam for high performance energy storage applications. (17th January 2017)

• Record Type: Journal Article
• Authors: Bulakhe, Ravindra N.; Nguyen, Van Hoa; Shim, Jae-Jin
• Is Part Of: New journal of chemistry. Volume 41:Number 4(2017)
• Page Start: 1473
• Page End: 1482
• Publication Date: 2017-01-17
• Subjects: Chemistry -- Periodicals; Chimie -- Périodiques; 540
• DOI: 10.1039/c6nj02590k
• Languages: English
• ISSNs: 1144-0546

Abstract

Abstract : MoS2 @reduced graphene oxide on 3D nickel foam was synthesized using an inexpensive room-temperature two-step method composed of the layer-by-layer method and solution-based successive ionic layer adsorption and reaction. Abstract : This paper describes the synthesis of molybdenum sulfide (MoS2 )@reduced graphene oxide (rGO) on 3D nickel foam via an inexpensive room-temperature two-step method composed of the layer-by-layer (LBL) method followed by solution-based successive ionic layer adsorption and reaction (SILAR). "Self-assembly" growth mechanisms are proposed to discuss the growth of MoS2 on the rGO to form nanohybrid layered structures. The prepared nanohybrid multilayered structure with a high specific surface area and good electrical conductivity provided a higher specific capacitance of 1071 F g −1 at a current density of 2 A g −1 than that of the bare MoS2 electrode (661 F g −1 at 2 A g −1 ), showing an approximately 60% increase in capacitance. The nanohybrid layered structure showed an excellent energy density of 47.6 W h kg −1 and a power density of 7.6 kW kg −1 with a good retention capacity of 95% after 2000 cycles. An asymmetric supercapacitor with MoS2 @rGO as the positive electrode and reduced graphene oxide as the negative electrode delivered a high energy density of 72.8 W h kg −1 at a power density of 7.4 kW kg −1 under an operating voltage window of 1.6 V. This performance was maintained at 92% of the original level at a constant current density of 8 A g −1, even after 4000 cycles. This approach offers a versatile technique for the design and synthesis of metal sulfide nanohybrid structures for electrochemical energy storage devices.