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<p>In this study, we investigate the influence of two synthesis routes—microwave-assisted and co-precipitation—on the electrochemical properties of NiFe<sub>2</sub>O<sub>4</sub> nanoparticle (NP)-dispersed PEO: NaNO<sub>3</sub> polymer electrolytes. The NPs were synthesized and incorporated into the polymer matrix at varying concentrations (0, 1, 3, and 5 wt%) to analyze their impact on ionic conductivity. Structural and compositional characterization was performed using XRD and FTIR, while electrical properties were assessed via electrochemical impedance spectroscopy (EIS). The results indicate that the co-precipitation method produces smaller nanoparticles (~ 14.5&#xa0;nm) with a narrow size distribution, whereas microwave-assisted synthesis yields larger particles (~ 22&#xa0;nm). FTIR analysis confirmed strong interactions between NPs and the polymer matrix, leading to modifications in vibrational modes and structural rearrangements. EIS measurements revealed that ionic conductivity peaked at 1 wt% NiFe<sub>2</sub>O<sub>4</sub> for the microwave-assisted sample, showing a twofold increase compared to the undoped electrolyte. However, further increasing NP concentration to 3 wt% and 5 wt% resulted in agglomeration, increased resistance, and decreased conductivity. The dielectric studies further confirmed enhanced charge carrier mobility at optimal NP loading. These findings highlight the potential of NiFe<sub>2</sub>O<sub>4</sub>-doped PEO: NaNO<sub>3</sub> polymer electrolytes in energy storage applications, demonstrating that synthesis method and NP concentration significantly influence electrochemical performance.</p>

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Comparative analysis of NiFe2O4 nanoparticles synthesized via microwave-assisted and co-precipitation methods for ionic conductivity enhancement in PEO: NaNO3 polymer electrolytes

  • 期刊论文

  • 发表日期：

    2025年7月23日

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  • Bala Talib Ali,
  • Ibrahim Nazem Qader

摘要

In this study, we investigate the influence of two synthesis routes—microwave-assisted and co-precipitation—on the electrochemical properties of NiFe2O4 nanoparticle (NP)-dispersed PEO: NaNO3 polymer electrolytes. The NPs were synthesized and incorporated into the polymer matrix at varying concentrations (0, 1, 3, and 5 wt%) to analyze their impact on ionic conductivity. Structural and compositional characterization was performed using XRD and FTIR, while electrical properties were assessed via electrochemical impedance spectroscopy (EIS). The results indicate that the co-precipitation method produces smaller nanoparticles (~ 14.5 nm) with a narrow size distribution, whereas microwave-assisted synthesis yields larger particles (~ 22 nm). FTIR analysis confirmed strong interactions between NPs and the polymer matrix, leading to modifications in vibrational modes and structural rearrangements. EIS measurements revealed that ionic conductivity peaked at 1 wt% NiFe2O4 for the microwave-assisted sample, showing a twofold increase compared to the undoped electrolyte. However, further increasing NP concentration to 3 wt% and 5 wt% resulted in agglomeration, increased resistance, and decreased conductivity. The dielectric studies further confirmed enhanced charge carrier mobility at optimal NP loading. These findings highlight the potential of NiFe2O4-doped PEO: NaNO3 polymer electrolytes in energy storage applications, demonstrating that synthesis method and NP concentration significantly influence electrochemical performance.