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Nanostructured high-performance electrolyte membranes based on polymer network post-assembly for high-temperature

Minghao Zeng1, Haikun Guo1, Gang Wang1

  • 1State Key Laboratory of Supramolecular Structure and Materials, College of Chemistry, Jilin University, 2699 Qianjin Street, Changchun 130012, PR China.

Journal of Colloid and Interface Science
|July 1, 2021
PubMed
Summary

Researchers developed advanced polymer electrolyte membranes (PEMs) for high-temperature supercapacitors. These membranes offer high conductivity and stability at elevated temperatures, improving energy storage device performance.

Keywords:
Bicontinuous structuresHigh-performance polymer electrolyte membranesHigh-temperature supercapacitorsNanostructured electrolytesProton conduction

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • High-temperature supercapacitors (HT-SCs) require stable polymer electrolyte membranes (PEMs) with high ionic conductivity.
  • Achieving both high stability and conductivity in PEMs at elevated temperatures presents a significant challenge.

Purpose of the Study:

  • To fabricate high-performance proton-conductive PEMs for HT-SCs.
  • To develop a post-assembly strategy for controlling polymer network rearrangement in PEMs.

Main Methods:

  • Fabrication of bicontinuous PEMs via controllable cross-linking of poly(ether-ether-ketone) and poly(4-vinylpyridine).
  • Inducement of phosphoric acid into the cross-linked polymer networks.
  • Post-assembly strategy to control polymer network rearrangement.

Main Results:

  • The developed PEMs exhibit high proton conductivity (70 mS cm⁻¹) and modulus (39.3 MPa) at 150 °C.
  • HT-SCs using these PEMs show a specific capacitance of 138.0 F g⁻¹.
  • Excellent cycle stability with 80.0% capacitance retention after 2500 cycles at 150 °C.

Conclusions:

  • The post-assembly strategy enables the creation of cross-linked PEMs with bicontinuous nanostructures, offering high stability and conductivity.
  • These PEMs are suitable for high-performance electrolytes in HT-SCs.
  • This approach provides a new pathway for designing advanced PEMs for energy devices.