Polyethylene Oxide-Based Solid-State Composite Polymer Electrolytes for Rechargeable Lithium Batteries
Polyethylene Oxide-Based Solid-State Composite Polymer Electrolytes for Rechargeable Lithium Batteries
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DOI：
10.1021/acsaem.1c00216
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发表时间：
2021-05-03
影响因子：
6.4
通讯作者：
Gao, Xue-Ping
中科院分区：
文献类型：
--
作者：
Ding, Wen-Qiang;Lv, Fei;Gao, Xue-Ping
固态聚合物电解质具有安全性高、机械柔韧性好、易成膜等优点，被认为是下一代高能锂电池最有前途的电解质。在所有的聚合物中，聚氧化乙烯（PEO）被证明是一个可行的聚合物主体，基于其高的介电常数和强的锂盐溶解能力。然而，PEO在全固态锂电池中的实际应用主要受到其在室温下的低离子电导率的限制。几十年来，研究人员一直致力于提高复合聚合物电解质的室温离子电导率和机械性能。特别地，根据不同电池系统的要求，对电极/电解质界面结构进行了设计和优化。因此，本文对PEO基复合聚合物电解质的基本特性、离子传输机理、惰性/活性填料与聚合物的复合机理以及电极/电解质界面结构进行了综述。最后，对固态聚合物电解质和高能锂电池的发展前景进行了展望。
Solid-state polymer electrolytes are considered to be the most promising electrolytes for next-generation high-energy rechargeable lithium batteries due to the advantages of high safety, good mechanical flexibility, and easy film-formation ability. Among all the polymers, polyethylene oxide (PEO) is demonstrated to be a feasible polymer host, based on its high dielectric constant and strong lithium salt dissolving ability. However, the practical application of PEO in the all-solid-state lithium batteries is limited mainly by its low ionic conductivity at room temperature. For decades, researchers dedicate to increase the ion conductivity at room temperature and mechanical properties according to the technology strategy of composite polymer electrolytes. In particular, the electrode/electrolyte interface structure is designed and optimized according to the requirement of different battery systems. Accordingly, in this review, the basic characteristics, ion transport mechanism, composite mechanism of inert/active fillers with polymers, and electrode/electrolyte interface structures are evaluated for the PEO-based composite polymer electrolytes. Finally, the outlook is presented for future development of the solid-state polymer electrolytes and high-energy rechargeable lithium batteries.