Li Xiuhong, Deng Yichen, Li Kai, Yang Zhiyong, Hu Xinyu, Liu Yong, Zhang Zheng
School of Mechanical Engineering, Hubei University of Technology, Wuhan 430000, China.
School of Materials Science and Engineering, Beijing University of Chemical Technology, Chaoyang District, Beijing 100000, China.
Polymers (Basel). 2023 Sep 11;15(18):3727. doi: 10.3390/polym15183727.
Polyethylene oxide (PEO)-based solid-state electrolytes for lithium-ion batteries have garnered significant interest due to their enhanced potential window, high energy density, and improved safety features. However, the issues such as low ionic conductivity at ambient temperature, substantial ionic conductivity fluctuations with temperature changes, and inadequate electrolyte interfacial compatibility hinder their widespread applications. Electrospinning is a popular approach for fabricating solid-state electrolytes owing to its superior advantages of adjustable component constitution and the unique internal fiber structure of the resultant electrolytes. Thus, this technique has been extensively adopted in related studies. This review provides an overview of recent advancements in optimizing the performance of PEO solid-state electrolytes via electrospinning technology. Initially, the impacts of different lithium salts and their concentrations on the performance of electrospun PEO-based solid-state electrolytes were compared. Subsequently, research pertaining to the effects of various additives on these electrolytes was reviewed. Furthermore, investigations concerning the enhancement of electrospun solid-state electrolytes via modifications of PEO molecular chains are herein detailed, and lastly, the prevalent challenges and future directions of PEO-based solid-state electrolytes for lithium-ion batteries are summarized.
用于锂离子电池的聚环氧乙烷（PEO）基固态电解质因其具有更大的电位窗口、高能量密度和改进的安全特性而备受关注。然而，诸如室温下离子电导率低、离子电导率随温度变化大幅波动以及电解质界面相容性不足等问题阻碍了它们的广泛应用。静电纺丝是一种制备固态电解质的常用方法，因为它具有可调节成分组成的卓越优势以及所得电解质独特的内部纤维结构。因此，该技术已在相关研究中得到广泛应用。本文综述了通过静电纺丝技术优化PEO固态电解质性能的最新进展。首先，比较了不同锂盐及其浓度对静电纺丝PEO基固态电解质性能的影响。随后，综述了有关各种添加剂对这些电解质影响的研究。此外，本文详细阐述了通过修饰PEO分子链增强静电纺丝固态电解质的研究，最后总结了锂离子电池PEO基固态电解质面临的普遍挑战和未来发展方向。
