Challenges in Lithium Metal Anodes for Solid-State Batteries
Challenges in Lithium Metal Anodes for Solid-State Batteries
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DOI：
10.1021/acsenergylett.9b02668
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发表时间：
2020-03-13
影响因子：
22
通讯作者：
Zeier, Wolfgang G.
中科院分区：
文献类型：
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作者：
Hatzell, Kelsey B.;Chen, Xi Chelsea;Zeier, Wolfgang G.
从这个角度，我们重点介绍了与固态电池中锂金属阳极集成相关的最新进展和挑战。虽然先前的报道表明固体电解质对锂金属可能是不渗透的，但在各种电解液成分和循环条件下，这一假说已经被证明是错误的。在此，我们描述了无机和有机固体电解质中锂丝生长和界面形成的机制起源和重要性。将真实和互易空间成像和建模相结合的多模式技术将是充分了解这些埋藏界面上的非平衡动力学所必需的。目前，锂电极在固体电解质界面上的动力学研究大多是在对称的Li-Li构型下完成的。为了充分了解锂金属阳极带来的挑战和机遇，全电池实验是必要的。最后，关于压力、几何形状和磨损协议，操作条件对固态电池的影响在很大程度上是未知的。鉴于这个社区的快速增长和多样化的固体电解质产品组合，我们强调需要详细报告整个社区的实验条件和协议标准化。
In this Perspective, we highlight recent progress and challenges related to the integration of lithium metal anodes in solid-state batteries. While prior reports have suggested that solid electrolytes may be impermeable to lithium metal, this hypothesis has been disproven under a variety of electrolyte compositions and cycling conditions. Herein, we describe the mechanistic origins and importance of lithium filament growth and interphase formation in inorganic and organic solid electrolytes. Multimodal techniques that combine real and reciprocal space imaging and modeling will be necessary to fully understand nonequilibrium dynamics at these buried interfaces. Currently, most studies on lithium electrode kinetics at solid electrolyte interfaces are completed in symmetric Li-Li configurations. To fully understand the challenges and opportunities afforded by Li-metal anodes, full-cell experiments are necessary. Finally, the impacts of operating conditions on solid-state batteries are largely unknown with respect to pressure, geometry, and break-in protocols. Given the rapid growth of this community and the diverse portfolio of solid electrolytes, we highlight the need for detailed reporting of experimental conditions and standardization of protocols across the community.