Preparation of Petal-like structure NiO@ZIF-67 nanocomposites for application to high-performance supercapacitors

IF 2.6 4区化学 Q3 ELECTROCHEMISTRY

Journal of Solid State Electrochemistry Pub Date : 2024-10-24 DOI:10.1007/s10008-024-06120-0

Yuhang Mou, Qing He, Ying He, Chenyao Meng, Hui Liu, Liang Li

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引用次数: 0

Abstract

Supercapacitors as green energy storage devices are widely utilized in vehicle manufacturing, rail transportation, power systems, and other fields. In this study, petal-like NiO was synthesized via a one-step hydrothermal method, followed by the preparation of NiO@ZIF-67 composite electrode material at room temperature. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and scanning electron microscopy (SEM) tests demonstrated that the NiO in NiO@ZIF-67 possesses a porous petal-like structure, with ZIF-67 particles uniformly growing on NiO sheets. The effect of ZIF-67 content on the electrochemical performance of NiO was investigated, and results showed that NiO@ZIF-67/1, prepared with a mass ratio of NiO to Co(NO₃)₂·6 H₂O of 1:1, exhibits the optimal electrochemical performance. The specific capacitance of NiO@ZIF-67/1 electrode material reached 188.44 F·g⁻¹ at 1 A/g. Furthermore, the symmetric supercapacitor assembled with NiO@ZIF-67 exhibited a maximum energy density of 41.76 Wh/kg at 1.4 kW/h, with a capacitance retention rate of 87.2% after 5000 cycles.

Graphical abstract

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花瓣状结构NiO@ZIF-67纳米复合材料在高性能超级电容器中的应用

超级电容器作为一种绿色储能器件，广泛应用于汽车制造、轨道交通、电力系统等领域。本研究首先采用一步水热法合成花瓣状NiO，然后在室温下制备NiO@ZIF-67复合电极材料。x射线衍射（XRD）、x射线光电子能谱（XPS）和扫描电镜（SEM）测试表明，NiO@ZIF-67中的NiO具有多孔的花瓣状结构，ZIF-67颗粒均匀生长在NiO薄片上。研究了ZIF-67含量对NiO电化学性能的影响，结果表明，当NiO与Co（NO₃）₂·6 H₂O的质量比为1:1时制备的NiO@ZIF-67/1具有最佳的电化学性能。NiO@ZIF-67/1电极材料在1 A/g时的比电容达到188.44 F·g⁻¹。此外，用NiO@ZIF-67组装的对称超级电容器在1.4 kW/h下的最大能量密度为41.76 Wh/kg，循环5000次后的电容保持率为87.2%。图形抽象

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来源期刊

Journal of Solid State Electrochemistry 工程技术-电化学

CiteScore

4.80

自引率

4.00%

发文量

227

审稿时长

4.1 months

期刊介绍： The Journal of Solid State Electrochemistry is devoted to all aspects of solid-state chemistry and solid-state physics in electrochemistry. The Journal of Solid State Electrochemistry publishes papers on all aspects of electrochemistry of solid compounds, including experimental and theoretical, basic and applied work. It equally publishes papers on the thermodynamics and kinetics of electrochemical reactions if at least one actively participating phase is solid. Also of interest are articles on the transport of ions and electrons in solids whenever these processes are relevant to electrochemical reactions and on the use of solid-state electrochemical reactions in the analysis of solids and their surfaces. The journal covers solid-state electrochemistry and focusses on the following fields: mechanisms of solid-state electrochemical reactions, semiconductor electrochemistry, electrochemical batteries, accumulators and fuel cells, electrochemical mineral leaching, galvanic metal plating, electrochemical potential memory devices, solid-state electrochemical sensors, ion and electron transport in solid materials and polymers, electrocatalysis, photoelectrochemistry, corrosion of solid materials, solid-state electroanalysis, electrochemical machining of materials, electrochromism and electrochromic devices, new electrochemical solid-state synthesis. The Journal of Solid State Electrochemistry makes the professional in research and industry aware of this swift progress and its importance for future developments and success in the above-mentioned fields.