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<p>Dispersion of inorganic fillers helps in increasing the disorderness in the polymer electrolytes and inculcating ion dissociation. In the present work, the impact of copper (Cu) micro-particles on the structural, thermal, and electrochemical behavior of a sodium-ion conducting gel polymer electrolytes comprising Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer and a liquid electrolyte of NaBF<sub>4</sub> salt in a mixture of ethylene carbonate and propylene carbonate is presented. The free-standing and flexible films of the gel polymer electrolyte with uniform dispersion of the Cu micro-particles were prepared by solution casting techniques. The optimized electrolyte composition displays jump in the conductivity with an excellent ionic conductivity of 5.19 mS cm<sup>−1</sup> at room temperature. The optimized electrolyte composition shows improved electrochemical stability of ~ 4.2&#xa0;V. The Cu particles strike on two major fronts in the electrolyte system as; it helps ion dissociation as evident from dielectric studies and increase amorphicity of polymer backbone as evident from X-ray diffraction (XRD) and differential scanning calorimetry (DSC) studies.</p>

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Electrochemical investigations on PVDF-HFP-based sodium ion conducting gel polymer electrolyte added with copper particles

  • 期刊论文

  • 发表日期：

    2025年7月3日

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  • Rajendra Singh Nagar,
  • Manoj Kanani,
  • Sujeet Chaursia,
  • Kuldeep Mishra,
  • Deepak Kumar

摘要

Dispersion of inorganic fillers helps in increasing the disorderness in the polymer electrolytes and inculcating ion dissociation. In the present work, the impact of copper (Cu) micro-particles on the structural, thermal, and electrochemical behavior of a sodium-ion conducting gel polymer electrolytes comprising Poly (vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP) polymer and a liquid electrolyte of NaBF4 salt in a mixture of ethylene carbonate and propylene carbonate is presented. The free-standing and flexible films of the gel polymer electrolyte with uniform dispersion of the Cu micro-particles were prepared by solution casting techniques. The optimized electrolyte composition displays jump in the conductivity with an excellent ionic conductivity of 5.19 mS cm−1 at room temperature. The optimized electrolyte composition shows improved electrochemical stability of ~ 4.2 V. The Cu particles strike on two major fronts in the electrolyte system as; it helps ion dissociation as evident from dielectric studies and increase amorphicity of polymer backbone as evident from X-ray diffraction (XRD) and differential scanning calorimetry (DSC) studies.