Recent advances in separator design for lithium metal batteries without dendrite formation: Implications for electric vehicles

分离器(采油) 金属锂 材料科学 磷酸铁锂 电池(电) 热失控 工艺工程 纳米技术 化学 工程类 功率(物理) 阳极 电极 物理 量子力学 物理化学 热力学
作者
Yu Lei,Lulu Xu,Qing Nian Chan,Ao Li,Anthony Chun Yin Yuen,Yuan Yao,Guan Heng Yeoh,Wei Wang
出处
期刊:eTransportation [Elsevier BV]
卷期号:20: 100330-100330 被引量:10
标识
DOI:10.1016/j.etran.2024.100330
摘要

Electric vehicle (EV) technology addresses the challenge of reducing carbon and greenhouse gas emissions. The power battery, which serves as the energy source for EVs, directly impacts their driving range, maximum speed, and service life. Considering the high energy density requirements for future EVs, lithium metal anodes possess several advantages such as high theoretical capacity, high energy and power density, and low electrochemical reduction potential which enable them to be a promising material for next-generation batteries. However, lithium metal anodes suffer from short cycle life and safety concerns due to the formation of dendritic and moss-like metal deposits that impede battery performance and reliability. This review will feature the recent advancement of functional separators to tackle these challenges. Firstly, this review presents a comprehensive review of the growth mechanism of lithium dendrites and delineates the underlying processes leading to battery failure. This aims to deepen understanding, which serves as a fundamental basis for classifying separators. Then, according to the growth of lithium dendrites and the failure process of lithium metal batteries, namely lithium-ion nucleation, growth of lithium dendrites, penetration of lithium dendrites into the separator, thermal runaway and even failure of the battery, four types of functional separators for different stages are proposed. The functions of these types of separators are to prevent the nucleation of lithium ions and regulate the uniform deposition of lithium ions, detect and eliminate dendrites, increase the mechanical strength of the separator and enhance the thermal stability and flame-retardancy of the separators, respectively. Finally, the recent advances of the above strategies are reviewed and discussed, existing critical problems are identified, and the future perspective of functional separators for the safety of lithium metal batteries is also discussed.
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