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Stable Efficient Solid-State Supercapacitors and Dye-Sensitized Solar Cells Using Ionic Liquid-Doped Solid Biopolymer

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  • 1Center for Solar Cells & Renewable Energy, Department of Physics, Sharda University, Greater Noida 201310, India.

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Summary
This summary is machine-generated.

This study developed a biodegradable corn starch-based polymer electrolyte doped with ionic liquid, achieving high ionic conductivity. This eco-friendly material shows promise for energy storage devices like electric double-layer capacitors and dye-sensitized solar cells.

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Growing environmental concerns necessitate alternatives to synthetic, non-biodegradable materials.
  • Biodegradable polymers offer a sustainable platform for developing novel electrolytes.
  • Replacing traditional electrolytes with eco-friendly options is a key research focus.

Purpose of the Study:

  • To develop a highly conducting, biodegradable polymer electrolyte using corn starch and ionic liquid.
  • To optimize the electrolyte for enhanced ionic conductivity and stability.
  • To evaluate the performance of the developed electrolyte in energy storage devices.

Main Methods:

  • Solution casting method for preparing corn starch-based polymer electrolytes.
  • Doping with 1-hexyl-3-methylimidazolium iodide ionic liquid.
  • Characterization using FTIR, XRD, POM, thermal analysis, and electrochemical studies.
  • Fabrication and testing of electric double-layer capacitors (EDLCs) and dye-sensitized solar cells (DSSCs).

Main Results:

  • Achieved a maximum ionic conductivity of 1.90 × 10-3 S/cm.
  • FTIR confirmed complexation; XRD and POM indicated reduced crystallinity.
  • Demonstrated thermal stability above 200 °C and an electrochemical window of 3.91 V.
  • Ionic transference number confirmed predominant ionic charge carriers.
  • Fabricated EDLC and DSSC showed specific capacitance of 130 F/g and 1.73% efficiency, respectively.

Conclusions:

  • The ionic liquid-doped corn starch polymer electrolyte is a promising biodegradable material for energy storage.
  • The developed electrolyte exhibits excellent ionic conductivity, stability, and electrochemical performance.
  • This research contributes to the development of sustainable materials for next-generation electronic devices.