The aim of this work is to improve the comprehensive performance of Lithium-ion batteries (LIBs) by designing and fabricating novel polymer electrolyte. A flexible film composed of electro-spun polyacrylonitrile/1,2-ethylidene-bridged polysilsesquioxane composite nanofibers (PAN@ee-PSiO) was synthesized via a sol–gel method, and then used as scaffold to absorb organic electrolyte to make gel electrolyte membrane (PAN@ee-PSiO-GE). It presents high electrolyte uptake (472 wt%), thermal stability (up to ∼300 °C), high ionic conductivity (∼7.2 mS cm⁻¹ at room temperature) and excellent interfacial contact with Li metal electrodes. Meanwhile, Si/SiC/C composite nanofibers (SSCNFs) were also produced from PAN/ee-PSiO film by magnesiothermic reduction and could act as anode material. The assembled SSCNFs|PAN@ee-PSiO-GE|Li half-cell exhibits excellent rate capability and good cycling stability, indicating a new way for designing and fabricating safer high-performance LIBs.

这项工作的目的是通过设计和制造新型聚合物电解质来提高锂离子电池（LIB）的综合性能。采用溶胶-凝胶法合成了由电纺聚丙烯腈/1,2-亚乙基桥联聚倍半硅氧烷复合纳米纤维（PAN@ee-PSiO）组成的柔性薄膜，然后作为支架吸收有机电解质制成凝胶电解质膜(PAN@ee-PSiO-GE)。它具有高电解质吸收率（472 wt%）、热稳定性（高达~300 °C）、高离子电导率（室温下~7.2 mS cm ^{-1 ）以及与锂金属电极良好的界面接触。}同时，还通过镁热还原法以PAN/ee-PSiO薄膜为原料制备了Si/SiC/C复合纳米纤维（SSCNFs），并可作为负极材料。组装的SSCNF|PAN@ee-PSiO-GE|Li半电池表现出优异的倍率性能和良好的循环稳定性，为设计和制造更安全的高性能LIB提供了一条新途径。