Facile one-step hydrothermal route to MSe/Mo3Se4 (M: Zn, Mn, and Ni)-based electrode materials for ultralong-life hybrid supercapacitors

• Published in: Journal of materials science & technology Vol. 156; pp. 230 - 240
• Main Authors: Krishna, B.N. Vamsi, Ankinapalli, Obula Reddy, Reddy, Ayyaluri Ramakrishna, Yu, Jae Su
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.09.2023
• Subjects: Molybdenum selenides; Nanosheet spheres; Nickel selenides; Ultralong-life cycling stability; Nickel selenides; Nanosheet spheres; Molybdenum selenides; Ultralong-life cycling stability
• ISSN: 1005-0302; 1941-1162
• DOI: 10.1016/j.jmst.2023.01.046

•The effect of metal ions on MSe/Mo3Se4 (M: Zn, Mn, and Ni) materials was studied.•The self-assembled nanosheet spheres benefit ion transfer.•The NMS NSSs revealed capacity retention of 80% over 80,000 ultra-long cycles.•The assembled NMS NSSs//AC device exhibited excellent electrochemical properties. Transition metal selenides have attracted great interest in electrochemical energy storage applications because of their good electrochemical activity and conductivity properties. Herein, we reported the metal molybdenum selenide (MSe/Mo3Se4 (M: Zn, Mn, and Ni)) electrode materials on their morphological and electrochemical properties by varying the metal ions via a facile hydrothermal technique. The effects of the structural, morphological, and surface area properties of the prepared powder materials on their electrochemical performance were studied. Owing to the hierarchical porous and unique interconnected structure, the nickel molybdenum selenide nanosheet spheres (NMS NSSs)-based electrode material delivered an excellent specific capacity value of 252 mAh g–1 at a current density of 1 A g–1. Moreover, the optimized NMS NSSs electrode exhibited outstanding cycling stability with a capacity retention of 80% and a corresponding coulombic efficiency of 99% after 80,000 cycles. Additionally, a pouch-type hybrid supercapacitor (HSC) device was assembled using NMS NSSs material as a positive electrode and activated carbon as a negative electrode in 1 M aqueous KOH electrolyte. Furthermore, the assembled HSC device exhibited superior energy and power density values as well as magnificent cycling stability. For real-time practical applications, light-emitting diodes and a digital display were powered using two series-connected HSC devices. Therefore, the obtained tremendous results strongly suggest that the NiSe/Mo3Se4 NSSs-based materials could be a promising electrode for ultralong-life energy storage applications. [Display omitted]