原位聚合制备聚合物电解质用于锂金属电池的研究进展  

Research progress in preparation of polymer electrolytes by in-situ polymerization for lithium metal batteries

作　　者：谢清水 张世禹 张成锟 胡欣超 彭栋梁[1] XIE Qingshui;ZHANG Shiyu;ZHANG Chengkun;HU Xinchao;PENG Dongliang(College of Materials,Xiamen University,Xiamen 361005,China)

机构地区：[1]厦门大学材料学院,福建厦门361005

出　　处：《厦门大学学报(自然科学版)》2025年第1期1-14,62,共15页Journal of Xiamen University:Natural Science

基　　金：国家自然科学基金(52272240,U22A20118)。

摘　　要：[背景]聚合物电解质(PE)由于其良好的热稳定性、高柔韧性以及可加工性,成为固态电解质理想材料之一.原位聚合技术能增强电极-电解质的界面相容性,革新传统PE的制备方法,已广泛应用于PE的制备.[进展]本文阐述了原位聚合制备PE的最新研究进展,探讨了不同原位聚合工艺制备PE的优缺点,比较了不同单体通过原位聚合制备PE的差异,综述了原位聚合设计PE在离子电导率、机械性能、高电压稳定性和阻燃性能等方面的改性方法.[展望]基于上述研究进展,总结了原位聚合制备的PE在锂金属电池应用中所面临的问题和发展方向.由于各类电解质固有的局限性,研究者需要更深入地思考如何选择合适的方案对PE进行改性,为高能量密度固态锂金属电池的研发提供指导.[Background]Lithium-ion batteries,as a mature secondary energy storage system,have been widely used in various fields of daily life,such as portable electronic devices,electric vehicles,and smart grids.Lithium metal is an excellent candidate for an advanced battery anode due to its high theoretical specific capacity and low redox potential.However,a significant concern lies in the potential safety risks associated with lithium metal batteries(LMBs),such as fire and explosions.Solid-state electrolytes,serving as an important component in solid-state LMBs,play a critical role in enhancing the safety and cycling stability of the batteries.Among the various types of solid-state electrolytes,polymer electrolytes(PE)are one of the most promising options due to their flexibility,machinable property and light weight.However,the practical application of PE in solid-state polymer-based LMBs(SSPLMBs)is hindered due to its low ionic conductivity at room temperature,narrow electrochemical window,and insufficient compatibility between cathode and anode interfaces.[Progress]Although the flexibility of the polymer ensures good interface contact between the electrode and electrolyte,PE prepared using traditional technology struggle to fully wet the electrode material,thereby failing to completely overcome issues such as low ionic conductivity and high interface impedance.Therefore,establishing an integrated solid-solid interface holds significant importance for SSPLMBs.In-situ polymerization,an emerging synthesis method of PE,facilitates the conversion of liquid precursors into PE directly within the battery.The liquid precursor completely permeates the gaps between cathode particles,ensuring continuous liquid-solid interface contact.Subsequently,the cohesive solid-solid interface is formed through in-situ polymerization,optimizing the interface contact between the PE and the electrode.The thermal stability,mechanical properties,and electrochemical performance of PE can be tailored through the interaction of monomers and function

关 键 词：聚合物电解质 原位聚合 锂金属电池 电化学性能 

分 类 号：TM912[电气工程—电力电子与电力传动]