ZnS/MnO2 nanocomposite electrodes: A dual approach for superior supercapacitor and safety open structure lithium-ion battery

IF 4 2区化学 Q2 CHEMISTRY, PHYSICAL

Journal of Molecular Structure Pub Date : 2025-03-19 DOI:10.1016/j.molstruc.2025.142114

Sreenivasa Kumar Godlaveeti , Razan A. Alshgari , Mohammed Mushab , Li Mingqiang , He Ying

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引用次数: 0

Abstract

In this study, we present a simple hydrothermal method for the synthesis of ZnS/MnO₂ nanocomposites (NCs) for advanced hybrid supercapacitor (SC) and safe open-system lithium-ion battery (LIB) applications. The synthesized materials—ZnS, MnO₂, and ZnS/MnO₂ NCs—are comprehensively characterized using various techniques including X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), field emission transmission electron microscopy (FE-TEM), energy-dispersive X-ray analysis (EDAX), and X-ray photoelectron spectroscopy (XPS). The electrochemical behavior of these materials is evaluated through cyclic voltammetry (CV), galvanostatic charge-discharge (GCD) measurements, and electrochemical impedance spectroscopy (EIS). When tested in LIBs, the ZnS and ZnS/MnO₂ electrodes reveal promising performance, with the ZnS/MnO₂ composite showing an impressive specific capacitance (C_sp) of 254.3 F/g and exhibiting low charge transfer resistance. This results in a high energy density of 14.12 Wh/kg and a power density of 1998.4 W/kg. Furthermore, the composite achieves a peak discharge capacity of 181.41 mAh/g at a current density of 0.5 A/g, outperforming the pure ZnS electrode. These encouraging results highlight the potential of ZnS/MnO₂ NCs as a superior electrode material for SCs and safer, open-system LIBs, surpassing the performance of conventional LIBs.

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来源期刊

Journal of Molecular Structure 化学-物理化学

CiteScore

7.10

自引率

15.80%

发文量

2384

审稿时长

45 days

期刊介绍： The Journal of Molecular Structure is dedicated to the publication of full-length articles and review papers, providing important new structural information on all types of chemical species including: • Stable and unstable molecules in all types of environments (vapour, molecular beam, liquid, solution, liquid crystal, solid state, matrix-isolated, surface-absorbed etc.) • Chemical intermediates • Molecules in excited states • Biological molecules • Polymers. The methods used may include any combination of spectroscopic and non-spectroscopic techniques, for example: • Infrared spectroscopy (mid, far, near) • Raman spectroscopy and non-linear Raman methods (CARS, etc.) • Electronic absorption spectroscopy • Optical rotatory dispersion and circular dichroism • Fluorescence and phosphorescence techniques • Electron spectroscopies (PES, XPS), EXAFS, etc. • Microwave spectroscopy • Electron diffraction • NMR and ESR spectroscopies • Mössbauer spectroscopy • X-ray crystallography • Charge Density Analyses • Computational Studies (supplementing experimental methods) We encourage publications combining theoretical and experimental approaches. The structural insights gained by the studies should be correlated with the properties, activity and/ or reactivity of the molecule under investigation and the relevance of this molecule and its implications should be discussed.