Zhao Shuangshuang, Wu Qinxia, Ma Wenqing, Yang Lishan
Key Laboratory of Chemical Biology & Traditional Chinese Medicine Research (Ministry of Education of China), National and Local Joint Engineering Laboratory for New Petrochemical Materials and Fine Utilization of Resources, Key Laboratory of the Assembly and Application of Organic Functional Molecules of Hunan Province, Hunan Normal University, Changsha, China.
School of Materials Science and Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.
Front Chem. 2020 Aug 11;8:640. doi: 10.3389/fchem.2020.00640. eCollection 2020.
Solid-state polymer electrolytes (SPEs) have great processing flexibility and electrode-electrolyte contact and have been employed as the promising electrolytes for lithium metal batteries. Among them, poly(ethylene oxide) (PEO)-based SPEs have attracted widespread attention because of easy synthesis, low mass density, good mechanical stability, low binding energy with lithium salts, and excellent mobility of charge carriers. In order to overcome the low room-temperature ionic conductivity and the poor thermodynamic stability in high-voltage devices (>4.2 V) of the PEO materials, composition modulations by incorporating PEO with inorganic and/or organic components have been designed, which could effectively enable the applications of PEO-based SPEs with widened electro-stable voltage ranges. In this mini review, we describe recent progresses of several kinds of PEO composite structures for SPEs, and we compare the synthesis strategies and properties of these SPEs in lithium batteries. Further developments and improvements of the PEO-based materials for building better rechargeable batteries are also discussed.
固态聚合物电解质（SPEs）具有很大的加工灵活性以及电极与电解质的接触性，已被用作锂金属电池颇具前景的电解质。其中，聚环氧乙烷（PEO）基SPEs因其合成简便、质量密度低、机械稳定性好、与锂盐的结合能低以及载流子迁移率优异而受到广泛关注。为了克服PEO材料室温离子电导率低以及在高压器件（>4.2 V）中热力学稳定性差的问题，人们设计了通过将PEO与无机和/或有机组分结合进行成分调制的方法，这能够有效地使PEO基SPEs在拓宽的电稳定电压范围内得到应用。在这篇综述中，我们描述了几种用于SPEs的PEO复合结构的最新进展，并比较了这些SPEs在锂电池中的合成策略和性能。还讨论了用于构建更好的可充电电池的PEO基材料的进一步发展和改进。
