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<p>Nickel phosphate hydrate (Ni<sub>3</sub>(PO<sub>4</sub>)<sub>2</sub>·8H<sub>2</sub>O) has gained more attention as an electrode material for high-performance supercapacitors, primarily due to its inherent redox activity and favorable electrochemical properties. In this research, we successfully synthesized nickel phosphate hydrate via a facile hydrothermal process, systematically investigating the influence of different phosphate precursors on its electrochemical performance. Among the tested precursors, ammonium dihydrogen phosphate yielded superior overall results compared to sodium phosphate dibasic anhydrous. The synthesized compounds were comprehensively characterized using techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FT-IR) to confirm their phase purity, morphology, and chemical structure. Electrochemical evaluation revealed a remarkable maximum specific capacitance of 1350&#xa0;F/g at a current density of 15&#xa0;mA/cm², demonstrating its exceptional charge storage capability. The results highlighted the importance of nickel phosphate hydrates as robust and high-performing electrode materials, paving the way for their advanced applications in next-generation energy storage devices.</p>

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Synthesis and characterization of Ni3(PO4)2·8H2O for electrochemical capacitor

  • 期刊论文

  • 发表日期：

    2025年8月16日

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  • Sakshi M. Salunkhe,
  • Ankita D. Mohite,
  • Pavan K. Pagare,
  • Minaj M. Faras

摘要

Nickel phosphate hydrate (Ni3(PO4)2·8H2O) has gained more attention as an electrode material for high-performance supercapacitors, primarily due to its inherent redox activity and favorable electrochemical properties. In this research, we successfully synthesized nickel phosphate hydrate via a facile hydrothermal process, systematically investigating the influence of different phosphate precursors on its electrochemical performance. Among the tested precursors, ammonium dihydrogen phosphate yielded superior overall results compared to sodium phosphate dibasic anhydrous. The synthesized compounds were comprehensively characterized using techniques such as X-ray diffraction (XRD), scanning electron microscopy (SEM), and Fourier-transform infrared spectroscopy (FT-IR) to confirm their phase purity, morphology, and chemical structure. Electrochemical evaluation revealed a remarkable maximum specific capacitance of 1350 F/g at a current density of 15 mA/cm², demonstrating its exceptional charge storage capability. The results highlighted the importance of nickel phosphate hydrates as robust and high-performing electrode materials, paving the way for their advanced applications in next-generation energy storage devices.