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<p>The development of high-efficiency solid polymer electrolytes (SPEs) is crucial for safer lithium-ion batteries (LIBs), yet their application is hindered by low ionic conductivity and poor mechanical strength. In this study, SiO₂ nanoparticles were incorporated into polyethylene oxide (PEO)-based electrolytes and combined with electrospinning to fabricate organic–inorganic composite nanofiber membranes. SiO₂ reduces PEO crystallinity via hydrogen bonding, increasing amorphous regions for Li⁺ transport, while electrospinning further lowers crystallinity and introduces a porous structure that enhances ionic mobility. The resulting membranes show a 200% increase in tensile strength over pristine PEO, improving mechanical stability and resistance to lithium dendrites. In LiFePO₄|PEO/2%SiO₂-fiber|Li coin cells, the composite electrolyte delivers a specific capacity of 121.72 mAh g⁻<sup>1</sup> after 100 cycles at 60&#xa0;°C, with 81.2% capacity retention and an average Coulombic efficiency of 99.61%. These results demonstrate that combining SiO₂ incorporation with electrospinning effectively balances ionic conductivity and mechanical integrity, offering a promising strategy for high-performance all-solid-state LIBs.</p>

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SiO2-decorated electrospun peo nanofibers: enhanced ionic conductivity and mechanical strength for high-performance all-solid-state li-ion battery electrolytes

  • 期刊论文

  • 发表日期：

    2026年5月12日

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  • Xin Yang,
  • Xingdao Ma,
  • Yanying Lin,
  • Zenghua Zhao,
  • Chunyang Duan

摘要

The development of high-efficiency solid polymer electrolytes (SPEs) is crucial for safer lithium-ion batteries (LIBs), yet their application is hindered by low ionic conductivity and poor mechanical strength. In this study, SiO₂ nanoparticles were incorporated into polyethylene oxide (PEO)-based electrolytes and combined with electrospinning to fabricate organic–inorganic composite nanofiber membranes. SiO₂ reduces PEO crystallinity via hydrogen bonding, increasing amorphous regions for Li⁺ transport, while electrospinning further lowers crystallinity and introduces a porous structure that enhances ionic mobility. The resulting membranes show a 200% increase in tensile strength over pristine PEO, improving mechanical stability and resistance to lithium dendrites. In LiFePO₄|PEO/2%SiO₂-fiber|Li coin cells, the composite electrolyte delivers a specific capacity of 121.72 mAh g⁻1 after 100 cycles at 60 °C, with 81.2% capacity retention and an average Coulombic efficiency of 99.61%. These results demonstrate that combining SiO₂ incorporation with electrospinning effectively balances ionic conductivity and mechanical integrity, offering a promising strategy for high-performance all-solid-state LIBs.