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<p>The supercapacitive performance of LiMnPO<sub>4</sub> (LMP) as an electrode material has been significantly enhanced by applying nano-MIL-88A metal–organic framework (MOF) coatings. This study synthesizes the LMP/MIL-88A composite via a hydrothermal process and evaluates its properties using advanced characterization techniques, including XRD, TEM, EDX, XPS, and EDS, in conjunction with electrochemical performance measurements. The cross-sectional analysis of LMP particles revealed a uniform and well-distributed MIL-88A coating, which significantly increased the surface area. This uniformity was further confirmed by EDX and EDS mapping, demonstrating consistent elemental distribution. XPS analysis highlighted the chemical bonding at the interface, revealing strong Fe–O and Mn–O bonds that enhance adhesion and conductivity. The computed specific capacitance of liMnPO<sub>4</sub>@4%Mil-88a from GCD curves ranges from 64 to 400 Fg<sup>−1</sup> according to the different current densities. The composite maintained stable specific capacitance with minimal degradation over numerous cycles, indicating excellent energy storage performance. Electrochemical impedance spectroscopy (EIS) further supported these findings, showing reduced charge transfer resistance and improved ion transport in the composite. The study underscores the potential of MOF coatings to enhance supercapacitor electrode performance by increasing surface area, electrical conductivity, and ion transport efficiency. This work highlights the promise of MIL-88A coatings in developing high-performance supercapacitors and suggests future research directions, including optimizing the coating process and exploring other MOF types for energy storage applications.</p>

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Performance characteristics of LiMnPO4 coated with MIL-88A metal–organic framework for supercapacitor applications

  • 期刊论文

  • 发表日期：

    2025年11月3日

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  • Abdelaziz M. Aboraia,
  • Fatemah H. Alkallas,
  • Shoroog Alraddadi,
  • Amira Ben Gouider Trabelsi

摘要

The supercapacitive performance of LiMnPO4 (LMP) as an electrode material has been significantly enhanced by applying nano-MIL-88A metal–organic framework (MOF) coatings. This study synthesizes the LMP/MIL-88A composite via a hydrothermal process and evaluates its properties using advanced characterization techniques, including XRD, TEM, EDX, XPS, and EDS, in conjunction with electrochemical performance measurements. The cross-sectional analysis of LMP particles revealed a uniform and well-distributed MIL-88A coating, which significantly increased the surface area. This uniformity was further confirmed by EDX and EDS mapping, demonstrating consistent elemental distribution. XPS analysis highlighted the chemical bonding at the interface, revealing strong Fe–O and Mn–O bonds that enhance adhesion and conductivity. The computed specific capacitance of liMnPO4@4%Mil-88a from GCD curves ranges from 64 to 400 Fg−1 according to the different current densities. The composite maintained stable specific capacitance with minimal degradation over numerous cycles, indicating excellent energy storage performance. Electrochemical impedance spectroscopy (EIS) further supported these findings, showing reduced charge transfer resistance and improved ion transport in the composite. The study underscores the potential of MOF coatings to enhance supercapacitor electrode performance by increasing surface area, electrical conductivity, and ion transport efficiency. This work highlights the promise of MIL-88A coatings in developing high-performance supercapacitors and suggests future research directions, including optimizing the coating process and exploring other MOF types for energy storage applications.