The role of the solid electrolyte interphase layer in preventing Li dendrite growth in solid-state batteries
The role of the solid electrolyte interphase layer in preventing Li dendrite growth in solid-state batteries
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DOI：
10.1039/c8ee00540k
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发表时间：
2018-07
影响因子：
32.5
通讯作者：
Bingbin Wu;Shanyu Wang;J. Lochala;David Desrochers;Bo Liu;Wenqing Zhang;Jihui Yang;Jie Xiao
中科院分区：
文献类型：
--
作者：
Bingbin Wu;Shanyu Wang;J. Lochala;David Desrochers;Bo Liu;Wenqing Zhang;Jihui Yang;Jie Xiao
近年来，由于对下一代高能电池技术的需求不断增长，锂（Li）金属阳极重新引起了人们的广泛关注。不幸的是，锂金属的循环稳定性差、效率低，并且会形成危险的锂枝晶，引发安全问题。利用固态电解质（SSE）来防止锂枝晶生长为应对这一挑战提供了一种有前景的方法。然而，最近的研究表明，高电流密度下很容易形成锂枝晶，这需要全面研究SSE内锂枝晶形成的基本机制。在此，通过使用 Li6.1Ga0.3La3Zr2O12 (LLZO) 和 NASICON 型 Li2O-Al2O3-P2O5-TiO2-GeO2 (LATP) 颗粒作为隔膜，研究并比较了通过 SSE 生长的锂枝晶的起源和演化。我们发现，Li和SSE之间的类似固体电解质界面（SEI）的界面层在减轻枝晶锂的生长方面发挥着关键作用，为SSE和锂金属之间的界面提供了新的见解，从而使未来的全固态电池成为可能。
Lithium (Li) metal anodes have regained intensive interest in recent years due to the ever-increasing demand for next-generation high energy battery technologies. Li metal, unfortunately, suffers from poor cycling stability and low efficiency as well as from the formation of dangerous Li dendrites, raising safety concerns. Utilizing solid-state electrolytes (SSEs) to prevent Li dendrite growth provides a promising approach to tackle the challenge. However, recent studies indicate that Li dendrites easily form at high current densities, which calls for full investigation of the fundamental mechanisms of Li dendrite formation within SSEs. Herein, the origin and evolution of Li dendrite growth through SSEs have been studied and compared by using Li6.1Ga0.3La3Zr2O12 (LLZO) and NASICON-type Li2O–Al2O3–P2O5–TiO2–GeO2 (LATP) pellets as the separators. We discover that a solid electrolyte interphase (SEI)-like interfacial layer between Li and SSE plays a critical role in alleviating the growth of dendritic Li, providing new insights into the interface between SSE and Li metal to enable future all solid-state batteries.