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<p>The solid polymer electrolyte (SPE) is always a hot topic in both academia and industry but the ionic conductivity of SPE, such as polyurethane-type electrolytes, is generally low. In this article, we prepared a TPU-based polymer solid electrolyte by incorporating polyethylene oxide-grafted polysiloxane (PDMS-PEO), and characterized it through a series of characterization methods including FTIR, SEM, XRD, DSC and DMA, investigating the influence of PDMS-PEO on the structure and conventional properties of the SPE. Furthermore, electrochemical workstation and battery tester were utilized for relevant characterization of SPE. Experimental results demonstrated that the addition of 5wt% TPU-based polymer solid electrolyte exhibited an ion conductivity of 2.0 × 10<sup>−4</sup> S/cm at room temperature. Additionally, the pouch-type symmetric cell assembled with this electrolyte achieved a cycling time exceeding 800&#xa0;h at room temperature while the ion transference number of this electrolyte also increased with addition of PDMS-PEO.</p>

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Preparation and characterization of TPU-based solid electrolyte modified by polyethylene oxide-grafted polysiloxane

  • 期刊论文

  • 发表日期：

    2025年7月17日

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  • Rui Yang,
  • Guangli Zheng,
  • Sucheng Liu,
  • Tong Yan,
  • Huiyu Song

摘要

The solid polymer electrolyte (SPE) is always a hot topic in both academia and industry but the ionic conductivity of SPE, such as polyurethane-type electrolytes, is generally low. In this article, we prepared a TPU-based polymer solid electrolyte by incorporating polyethylene oxide-grafted polysiloxane (PDMS-PEO), and characterized it through a series of characterization methods including FTIR, SEM, XRD, DSC and DMA, investigating the influence of PDMS-PEO on the structure and conventional properties of the SPE. Furthermore, electrochemical workstation and battery tester were utilized for relevant characterization of SPE. Experimental results demonstrated that the addition of 5wt% TPU-based polymer solid electrolyte exhibited an ion conductivity of 2.0 × 10−4 S/cm at room temperature. Additionally, the pouch-type symmetric cell assembled with this electrolyte achieved a cycling time exceeding 800 h at room temperature while the ion transference number of this electrolyte also increased with addition of PDMS-PEO.