High-Power-Density ZnWO4/Ni(OH)2 Electrode Materials for Hybrid Energy Storage Devices

IF 2.5 4区工程技术 Q3 ENGINEERING, ELECTRICAL & ELECTRONIC

Journal of Electronic Materials Pub Date : 2026-02-24 DOI:10.1007/s11664-026-12730-3

Ifrah Kiran, Yasir Javed, Khuram Ali, Muhammad Zahid

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Abstract

In this study, zinc tungstate (ZnWO₄), nickel hydroxide (NiH), and their nanocomposites at different ratios (ZnWO₄/NiH = 1:1, 2:1, and 1:2) were synthesized by the hydrothermal method and evaluated as an electrochemical energy storage electrode material. The successful preparation of pristine and composite materials was confirmed by x-ray diffraction, revealing that the ZnWO₄/NiH (1:2) composite possessed the smallest crystallite size of 14.8 nm. The ZnWO₄/NiH (1:2) composite showed ZnWO₄ nanorods present over the NiH nanosheets. Electrochemical analysis by a three-electrode system indicated specific capacity of 671.4 C/g for the ZnWO₄/NiH (1:2) at a current density of 1 A/g. The charge storage behavior indicated that the electrochemical reaction was primarily diffusion-controlled. The designed ZnWO₄/NiH (1:2) prototype device yielded specific capacity of 696 C/g, power density of 9955.6 W/kg, and energy density of 61.9 Wh/kg, with 70% cyclic stability and 98% coulombic efficiency for 5000 galvanostatic charge–discharge (GCD) cycles.

Graphical Abstract

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用于混合储能装置的高功率密度ZnWO4/Ni(OH)2电极材料

本研究采用水热法合成了钨酸锌（ZnWO4）、氢氧化镍（NiH）及其不同配比（ZnWO4/NiH = 1:1、2:1和1:2）的纳米复合材料，并对其作为电化学储能电极材料进行了评价。通过x射线衍射证实了原始材料和复合材料的成功制备，表明ZnWO4/NiH（1:2）复合材料的晶粒尺寸最小，为14.8 nm。ZnWO4/NiH（1:2）复合材料在NiH纳米片上出现了ZnWO4纳米棒。三电极体系电化学分析表明，在电流密度为1 a /g时，ZnWO4/NiH（1:2）的比容量为671.4 C/g。电荷存储行为表明电化学反应以扩散控制为主。设计的ZnWO4/NiH（1:2）原型装置在5000次恒流充放电循环中，比容量为696 C/g，功率密度为9955.6 W/kg，能量密度为61.9 Wh/kg，循环稳定性为70%，库仑效率为98%。图形抽象

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来源期刊

Journal of Electronic Materials 工程技术-材料科学：综合

CiteScore

4.10

自引率

4.80%

发文量

693

审稿时长

3.8 months

期刊介绍： The Journal of Electronic Materials (JEM) reports monthly on the science and technology of electronic materials, while examining new applications for semiconductors, magnetic alloys, dielectrics, nanoscale materials, and photonic materials. The journal welcomes articles on methods for preparing and evaluating the chemical, physical, electronic, and optical properties of these materials. Specific areas of interest are materials for state-of-the-art transistors, nanotechnology, electronic packaging, detectors, emitters, metallization, superconductivity, and energy applications. Review papers on current topics enable individuals in the field of electronics to keep abreast of activities in areas peripheral to their own. JEM also selects papers from conferences such as the Electronic Materials Conference, the U.S. Workshop on the Physics and Chemistry of II-VI Materials, and the International Conference on Thermoelectrics. It benefits both specialists and non-specialists in the electronic materials field. A journal of The Minerals, Metals & Materials Society.