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<p>The solution casting technique was employed to fabricate a natural, environmentally sustainable solid-state guar gum electrolyte, doped with ZnSO<sub>4</sub>·7H<sub>2</sub>O salt at varying weight-to-charge ratios of 10, 20, and 30 wt%. XRD study indicated that incorporating salt into pure guar gum electrolyte transforms it into an amorphous phase. The DSC test indicates the glass transition temperature (T<sub>g</sub>) for all electrolyte samples. The sample containing 30 wt% salt exhibited the lowest glass transition temperature (T<sub>g</sub>) of 68.4&#xa0;°C. The FTIR analysis investigates many bands, affirming the intricate characteristics of the synthesized polymer electrolyte. The SEM technique demonstrates the anisotropic surface morphology (spherical and elongated) of polymer electrolytes. We determined the ionic conductivity of all manufactured electrolyte samples at RT and in temperatures ranging from 40 to 100&#xa0;°C within the frequency range of 100&#xa0;Hz to 1&#xa0;MHz. The optimal maximum conductivity for a 30 wt% salt-doped electrolyte sample is 2.45 × 10<sup>− 5</sup> S cm<sup>-1</sup> at RT and 1.01 × 10<sup>− 4</sup> S cm<sup>-1</sup> at 100&#xa0;°C. The extended tail in the analysis of complex dielectric ε′(ω) and εʺ(ω) results in optimal capacitance characteristics. Furthermore, we employed a 70 wt% guar gum and 30 wt% ZnSO<sub>4</sub>·7H<sub>2</sub>O (G7Z3) electrolyte sample to fabricate the solar cell device. The photovoltaic characteristics were determined and η found to be 3.72%, 7.22&#xa0;mA cm<sup>-2</sup> for J<sub>sc</sub> (short-circuit photocurrent density), 758 mV for V<sub>oc</sub> (open-circuit voltage), and 0.68 for fill factor.</p>

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Exploration of the structural, electrical characteristics, and solar cell applications of an electrolyte membrane derived from guar gum

  • 期刊论文

  • 发表日期：

    2026年3月24日

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  • B. Srinivas,
  • T. Sreekanth,
  • M. Raghavender,
  • Rajesh Siripuram

摘要

The solution casting technique was employed to fabricate a natural, environmentally sustainable solid-state guar gum electrolyte, doped with ZnSO4·7H2O salt at varying weight-to-charge ratios of 10, 20, and 30 wt%. XRD study indicated that incorporating salt into pure guar gum electrolyte transforms it into an amorphous phase. The DSC test indicates the glass transition temperature (Tg) for all electrolyte samples. The sample containing 30 wt% salt exhibited the lowest glass transition temperature (Tg) of 68.4 °C. The FTIR analysis investigates many bands, affirming the intricate characteristics of the synthesized polymer electrolyte. The SEM technique demonstrates the anisotropic surface morphology (spherical and elongated) of polymer electrolytes. We determined the ionic conductivity of all manufactured electrolyte samples at RT and in temperatures ranging from 40 to 100 °C within the frequency range of 100 Hz to 1 MHz. The optimal maximum conductivity for a 30 wt% salt-doped electrolyte sample is 2.45 × 10− 5 S cm-1 at RT and 1.01 × 10− 4 S cm-1 at 100 °C. The extended tail in the analysis of complex dielectric ε′(ω) and εʺ(ω) results in optimal capacitance characteristics. Furthermore, we employed a 70 wt% guar gum and 30 wt% ZnSO4·7H2O (G7Z3) electrolyte sample to fabricate the solar cell device. The photovoltaic characteristics were determined and η found to be 3.72%, 7.22 mA cm-2 for Jsc (short-circuit photocurrent density), 758 mV for Voc (open-circuit voltage), and 0.68 for fill factor.