Oxygen-vacancy-rich Aligned Nanofibers Enhancing Ion Transport in Polymer Composite Solid Electrolytes

Ke-ding Chen; Fei Wang; Yue-e Miao; Tian-xi Liu

doi:10.11777/j.issn1000-3304.2026.26146

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Oxygen-vacancy-rich Aligned Nanofibers Enhancing Ion Transport in Polymer Composite Solid Electrolytes

更新时间：2026-07-23

- Oxygen-vacancy-rich Aligned Nanofibers Enhancing Ion Transport in Polymer Composite Solid Electrolytes
- Acta Polymerica Sinica Pages: 1-15(2026)
- 作者机构：
  
  1.东华大学材料科学与工程学院先进纤维材料全国重点实验室上海 201620
  2.江南大学化学与材料工程学院合成与生物胶体教育部重点实验室无锡 214122
- 作者简介：
  
  Yue-e Miao, E-mail: yuee_miao@dhu.edu.cn
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2026.26146
  CLC：
- CSTR：32057.14.GFZXB.2026.7668
- Received：03 May 2026，
  
  Accepted：15 June 2026，
  
  Online First：23 July 2026，
- 稿件说明：
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陈轲鼎, 王菲, 缪月娥, 刘天西. 富氧空位的取向纳米纤维增强聚合物复合固态电解质的离子传输性能. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26146.

Chen, K. D.; Wang, F.; Miao, Y. E.; Liu, T. X. Oxygen-vacancy-rich aligned nanofibers enhancing ion transport in polymer composite solid electrolytes. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26146.
陈轲鼎, 王菲, 缪月娥, 刘天西. 富氧空位的取向纳米纤维增强聚合物复合固态电解质的离子传输性能. 高分子学报, doi: 10.11777/j.issn1000-3304.2026.26146. DOI： CSTR： 32057.14.GFZXB.2026.7668.

Chen, K. D.; Wang, F.; Miao, Y. E.; Liu, T. X. Oxygen-vacancy-rich aligned nanofibers enhancing ion transport in polymer composite solid electrolytes. Acta Polymerica Sinica (in Chinese), doi: 10.11777/j.issn1000-3304.2026.26146. DOI： CSTR： 32057.14.GFZXB.2026.7668.

摘要

聚环氧乙烷(PEO)基复合固态电解质因良好的柔性与电极界面兼容性，成为目前固态电解质领域的研究热点. 然而，无机填料分散性差及有机-无机界面相互作用弱等关键问题，导致其在长循环中离子传输受阻、界面极化加剧. 针对上述问题，本研究提出利用富氧空位的取向纳米纤维构建连续定向离子传输路径并优化有机-无机界面相互作用的协同调控策略，以制备高性能PEO基复合固态电解质. 具体而言，采用水平取向聚丙烯腈(APAN)纳米纤维为基底，原位生长富含氧空位的层状双金属氢氧化物(MoNiCo-LDH)，构筑具有有序取向结构的APAN/LDH复合纳米纤维网络；在此基础上灌注PEO，获得有机-无机复合固态电解质(MoNiCo-LDH@APAN-PEO). 得益于该结构设计：一方面，氧空位可以增强LDH与PEO的界面相互作用，在降低PEO结晶度的同时，通过与TFSI

之间的静电相互作用促进锂盐解离；另一方面，取向纳米纤维的有序结构为锂离子提供了连续定向的传输路径，有效抑制锂枝晶生长. 因此，该复合固态电解质在60 ℃下的离子电导率达0.79 mS·cm

-1

，锂离子迁移数为0.73，电化学窗口高达5.2 V；对称电池可稳定循环1500 h，全电池循环200圈后的容量保持率为89%. 本研究提出的界面氧空位与定向离子传输路径协同调控策略，有望为高性能固态锂金属电池用聚合物基复合电解质的设计与制备提供新思路.

Abstract

Poly(ethylene oxide) (PEO)-based composite solid electrolytes (CSEs) have attracted considerable attention owing to their excellent flexibility and interfacial compatibility. However

their practical application is limited by the poor dispersion of inorganic fillers and weak organic-inorganic interfacial interactions

which lead to severely impeded ion transport. Herein

we proposed a synergistic design strategy based on oxygen-vacancy-rich aligned nanofibers to construct continuous directional ion transport pathways and enhance organic-inorganic interfacial interactions. This resulting CSE delivered a high ionic conductivity of 0.79 mS·cm

-1

at 60 ℃

a Li

transference number of 0.74

and a wide electrochemical window of 5.2 V. Moreover

the Li symmetric cell demonstrated excellent cycling stability with 1500 h at 0.5 mA·cm

-2

while the LFP cell retained 89% capacity retention after 200 cycles.

关键词

Keywords

references

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