Fabrication of sodium and MoS2 incorporated NiO and carbon nanostructures for advanced supercapacitor application
Document Type
Article
Publication Date
7-1-2023
Abstract
Transition metal oxides and carbonaceous nanocomposites have triggered enormous interest in the application of high-performance supercapacitors due to the outstanding electrical conductivity and superior theoretical capacitance. In this study, we prepared highly porous nanostructured NiO/C yolk-shell nanocomposites via a simple calcination of nickel-based metal-organic frameworks. The porosity and electrochemical property were further enhanced by incorporating sodium and hierarchical MoS2 nanostructures via a facile hydrothermal method. It was found that the as-synthesized Na-doped MoS2@NiO/C nanocomposites with hierarchical porosity exhibited superior electrochemical performance. Particularly, the delivered electrochemical capacitance of NiO/ C yolk-shell structure was 1779.50 F g-1 in an aqueous electrolyte (2 M KOH), and a superior specific capaci-tance of 2540.63 F g-1 was acquired after the incorporation of sodium and 2D layered MoS2 into the nano -composite. When a symmetrical supercapacitor was fabricated, a remarkable energy density of 36.93 Wh kg-1 was recorded in an environmental-friendly aqueous-based electrolyte. More significantly, the outstanding delivered capacitance retention and coulombic efficiency were 111.92 % and 97.6 %, respectively after 4000 continuous GCD cycles. Hence, the Na-doped MoS2@NiO/C with hierarchical porous nanostructures and extraordinary electrochemical performance was explicitly demonstrated in this study and can be utilized as electrode active materials in realizing high-performance supercapacitors.
Keywords
MOF-derived nanocomposites, Transition metal oxides, Carbonaceous nanostructures, Supercapacitors, MoS2
Divisions
PHYSICS
Funders
Ministry of Education, Malaysia PRGS/1/2016/STG06/UM/02/1,FRGS/1/2019/STG02/UNIM/01/1
Publication Title
Journal of Energy Storage
Volume
63
Publisher
Elsevier
Publisher Location
RADARWEG 29, 1043 NX AMSTERDAM, NETHERLANDS