锂离子电池聚合物基复合金属氧化物固态电解质研究进展

随着电动汽车的不断普及，锂离子电池（LIBs）的安全性备受关注。目前固态锂离子电池具有能量密度高和安全性好的优势，被认为是解决传统液态锂金属电池安全隐患和提高其循环性能的关键材料。然而，单一形式的固态电解质存在离子电导率低、界面阻抗大等问题，限制了固态锂离子电池的发展。近年来，基于无机填料与聚合物电解质的有机-无机复合电解质受到了广泛关注，有机-无机复合固态电解质兼有聚合物与无机填料的优点，一方面可以提高柔韧性，另一方面可以有效提高电池的机械性能。本文归纳总结了有机聚合物与无机金属氧化物复合固态电解质的不同类型，分析了基于不同聚合物与无机金属氧化物复合形成的有机-无机复合固态电解质对锂离子电池复合界面行为、离子电导率、电池机械性能的影响，并对复合固态电解质制备和应用过程中存在的问题和解决方法进行了梳理。最后对聚合物基复合金属氧化物固态电解质未来要重点解决的问题和发展方向进行了预测。

Advances in Polymer-Based Composite Metal Oxide Solid-State Electrolytes for Lithium-Ion Batteries

With the rapid development of electric vehicles, the safety of lithium-ion batteries has attracted much more attention. At present, solid-state electrolytes are considered to be the key materials to solve the problems of hidden danger and cycle ability of traditional liquid-state lithium metal batteries. However, solid state electrolyte suffers from low ionic conductivity and high interface impedance, which still limits the development of Solid-state lithium battery. In recent years, organic-inorganic composite electrolyte based on inorganic packing and polymer electrolyte has attracted much more attention. The organic inorganic composite solid electrolyte has the advantages of both polymer and inorganic filler, on one hand, it can raise the flexibility and retention, on the other hand, the mechanical performance can be improved effectively. In this review, different types of organic polymers and inorganic metal oxide composite solid electrolytes were summarized. The effects of different inorganic metal oxide and Inorganic-organic composite solid electrolyte formed by polymer composite on composite interface behavior of lithium batteries, ionic conductivity and the mechanical properties of batteries were analyzed as well. Meanwhile, it sorted out the problems and solutions in the preparation and application of composite solid electrolytes. Finally, the predictions for the future problems and development directions of polymer-based composite metal oxide solid electrolytes had been pointed out.