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Conductive polyurethane elastomer electrolyte (PUEE) materials for anodic bonding.

Haocheng Zhao1,2, Weixuan Zhang3, Xu Yin1

  • 1College of Materials Science and Engineering, Taiyuan University of Science and Technology Taiyuan 030024 China lcr@tyust.edu.cn.

RSC Advances
|May 2, 2022
PubMed
Summary
This summary is machine-generated.

This study developed polyurethane elastomer electrolytes (PUEEs) for flexible devices. The PUEEs demonstrated excellent ionic conductivity and were successfully bonded to aluminum using anodic bonding, showing promise for device packaging.

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Area of Science:

  • Materials Science
  • Polymer Chemistry
  • Electrochemistry

Background:

  • Polymer solid electrolytes are crucial for flexible electronic devices.
  • Anodic bonding offers a method for preparing and packaging these devices.

Purpose of the Study:

  • To design and prepare polyurethane elastomer electrolytes (PUEEs).
  • To investigate the properties of PUEEs for flexible device applications.
  • To demonstrate the feasibility of using PUEEs with anodic bonding for device packaging.

Main Methods:

  • PUEEs were synthesized using polypropylene glycol (PPG), toluene-2,4-diisocyanate (TDI), and 1,4-butanediol (BDO).
  • Varying concentrations of lithium bis(trifluoromethanesulphonyl)imide (LiTFSI) were incorporated.
  • Anodic bonding was employed to join PUEE with aluminum sheets.
  • Ionic conductivity, thermal stability, and tensile strength were characterized.

Main Results:

  • PUEEs exhibited high thermal stability and ionic conductivity, reaching 9.6 × 10⁻⁵ S cm⁻¹ at 55 °C.
  • LiTFSI dissolved completely, forming complexes with the polyurethane matrix.
  • Successful anodic bonding between PUEE and aluminum was achieved, confirmed by SEM and EDS.
  • The maximum tensile strength of the bonded PUEE6/Al interface was 0.45 MPa.

Conclusions:

  • The synthesized PUEEs are suitable for flexible device preparation and packaging.
  • Anodic bonding is an effective method for integrating PUEEs with metallic components.
  • The developed PUEE material shows significant potential for advanced flexible electronic applications.