A High-Performance Self-Reinforced PEO-Based Blend Solid Electrolyte Membrane for Solid-State Lithium Ion Batteries

 Chengbin Li Chengbin Li , Hongyun Yue Hongyun Yue , Qiuxian Wang Qiuxian Wang , Shuting Yang Shuting Yang
Российский электрохимический журнал
Abstract / Full Text

The application of lithium-ion batteries is increasing, but the safety problems of traditional liquid lithium-ion batteries have not been fully resolved. Design and manufacture of solid electrolytes can thoroughly solve the problems. A self-reinforced poly(ethylene oxide) based blend solid electrolyte (PEO-BSPE) membrane was designed and prepared successfully by in-situ polymerization of ethoxylated trimethylolpropane triacrylate (ETPTA) in PEO electrolyte matrix under UV light to form a high-strength three-dimensional network structure. XRD and FESEM analyses proved that PEO-BSPE membranes were amorphous, smooth and flexible. The tensile strength of PEO-BSPE was 20 times higher than that of PEO-SPE film. PEO-BSPE also had good safety and low glass transition temperature. The ionic conductivity of PEO-BSPE at 55°C increased to 1.3 × 10–4 S cm–1. The electrochemical stability window of PEO-BSPE was 5.6 V. The solid-state battery was assembled with PEO-BSPE. The solid-state battery (LiFePO4/PEO-BSPE/Li) had good cycle stability, low interface impedance (189 Ω cm–2), high coulombic efficiency (>98%), high average specific discharge capacity (>135 mA h g–1 at 0.1 C) and excellent C-rate performance at 55°C. Hence the PEO-BSPE membrane is a very hopeful candidate for applying in all-solid-state lithium battery.

Author information
  • College of Cable Engineering, Henan Institute of Technology, 453003, Xinxiang, Henan, China

    Chengbin Li

  • National and Local Joint Engineering Laboratory of Motive Power and Key Materials, 453007, Xinxiang, Henan, China

    Chengbin Li, Hongyun Yue & Shuting Yang

  • Henan Key Laboratory of Wire and Cable Structures and Materials, 453003, Xinxiang, Henan, China

    Chengbin Li

  • Xinxiang Key Laboratory of Cable Flame Retardant and Fire Resistance Research and Testing, 453003, Xinxiang, Henan, China

    Chengbin Li

  • School of Chemistry and Chemical Engineering, Henan Normal University, 453007, Xinxiang, Henan, China

    Hongyun Yue & Shuting Yang

  • Henan (Xinxiang) Battery Research Institute, 453000, Xinxiang, Henan, China

    Qiuxian Wang

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