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PMMA-Based Composite Gel Polymer Electrolyte with Plastic Crystal Adopted for High-Performance Solid ECDs.

Zhou Zhou1, Yongkang Tang2, Gang Li2

  • 1School of Materials Science and Engineering, Zhejiang University, Hangzhou 310058, China.

Polymers
|July 29, 2023
PubMed
Summary

A new gel polymer electrolyte (GPE) using PMMA and succinonitrile (SN) offers enhanced lithium-ion conductivity. This material enables high-performance, stable solid electrochromic devices with fast response times.

Keywords:
electrochromic devicesplastic crystal electrolytesuccinonitriletransparent electrolyte

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Polymer Science

Background:

  • Gel polymer electrolytes (GPEs) are crucial for solid-state devices.
  • Improving lithium-ion dissociation and conductivity in GPEs is a key challenge.

Purpose of the Study:

  • To synthesize and characterize a novel PMMA-based GPE modified with succinonitrile (SN).
  • To investigate the impact of SN on lithium-ion dissociation, ionic conductivity, and mechanical properties.
  • To evaluate the performance of SN-GPE in quasi-solid-state electrochromic devices (ECDs).

Main Methods:

  • Solvent-casting method for GPE synthesis.
  • Fourier transform infrared spectroscopy (FTIR) and electrochemical impedance spectroscopy (EIS) for analysis.
  • Structural characterization and mechanical property assessment.
  • Fabrication and testing of quasi-solid-state ECDs.

Main Results:

  • Uniform distribution of SN in the PMMA matrix, enhancing lithium salt dissociation.
  • Achieved ionic conductivity of 2.02 mS·cm-1 with good mechanical properties.
  • SN-GPE based ECDs demonstrated stable cyclability and fast response times (10 s/30 s).

Conclusions:

  • SN modification significantly improves the performance of PMMA-based GPEs.
  • The developed SN-GPE is a promising material for high-performance solid electrochromic devices.
  • Understanding molecular interactions in SN-GPEs provides insights for future material design.