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<p>The development of economically viable energy storage devices with higher energy density and specific capacitance remains a major challenge in materials science. Recent advancements have emphasized the potential of flexible dielectric materials due to their high polarizability, mechanical flexibility, and adjustable electrical properties, making them suitable for integrated microelectronic and energy storage applications. In this study, we present the synthesis of cadmium sulfide-calcium phosphate (CdS–CaP) nanocomposites through a hydrothermal process and explore their potential as hybrid dielectric–electrochemical materials for supercapacitors. Structural analysis confirms the formation of distinct crystalline phases, with an average crystallite size of 18.7&#xa0;nm, while spectroscopic analysis reveals characteristic functional groups and a tunable bandgap up to 2.9&#xa0;eV for the CdS–CaP (2:1) composition. Electron microscopy shows a porous, rough surface that facilitates ion transport and charge storage. Dielectric measurements demonstrate a high permittivity of 377 and low dielectric loss, indicating effective polarization. Electrochemical testing shows pseudocapacitive charge storage with a maximum specific capacitance of 851.87&#xa0;F/g and a specific energy of 14.5&#xa0;Wh/kg for the CdS–CaP (1:2) composite. These findings position CdS–CaP composites as multifunctional materials that combine dielectric and electrochemical energy storage, offering a promising platform for integrated, high-performance energy storage systems.</p>

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Performance Analysis of Electrochemical and Dielectric Parameters of CdS–CaP Binary Nanocomposites for Energy Storage Application

  • 期刊论文

  • 发表日期：

    2025年8月26日

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  • Iqra Saleem,
  • Shazia Shukrullah,
  • Muhammad Adnan Munir,
  • Tareq Kareri,
  • Muhammad Irfan,
  • Mohammed Jalalah

摘要

The development of economically viable energy storage devices with higher energy density and specific capacitance remains a major challenge in materials science. Recent advancements have emphasized the potential of flexible dielectric materials due to their high polarizability, mechanical flexibility, and adjustable electrical properties, making them suitable for integrated microelectronic and energy storage applications. In this study, we present the synthesis of cadmium sulfide-calcium phosphate (CdS–CaP) nanocomposites through a hydrothermal process and explore their potential as hybrid dielectric–electrochemical materials for supercapacitors. Structural analysis confirms the formation of distinct crystalline phases, with an average crystallite size of 18.7 nm, while spectroscopic analysis reveals characteristic functional groups and a tunable bandgap up to 2.9 eV for the CdS–CaP (2:1) composition. Electron microscopy shows a porous, rough surface that facilitates ion transport and charge storage. Dielectric measurements demonstrate a high permittivity of 377 and low dielectric loss, indicating effective polarization. Electrochemical testing shows pseudocapacitive charge storage with a maximum specific capacitance of 851.87 F/g and a specific energy of 14.5 Wh/kg for the CdS–CaP (1:2) composite. These findings position CdS–CaP composites as multifunctional materials that combine dielectric and electrochemical energy storage, offering a promising platform for integrated, high-performance energy storage systems.