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<p>In this study, zinc tungstate (ZnWO<sub>4</sub>), nickel hydroxide (NiH), and their nanocomposites at different ratios (ZnWO<sub>4</sub>/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 ZnWO<sub>4</sub>/NiH (1:2) composite possessed the smallest crystallite size of 14.8&#xa0;nm. The ZnWO<sub>4</sub>/NiH (1:2) composite showed ZnWO<sub>4</sub> nanorods present over the NiH nanosheets. Electrochemical analysis by a three-electrode system indicated specific capacity of 671.4 C/g for the ZnWO<sub>4</sub>/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 ZnWO<sub>4</sub>/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.</p> Graphical Abstract <p></p>

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

  • 期刊论文

  • 发表日期：

    2026年2月24日

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  • Ifrah Kiran,
  • Yasir Javed,
  • Khuram Ali,
  • Muhammad Zahid

摘要

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