Interfacial Evolution of Lithium Dendrites and Their Solid Electrolyte Interphase Shells of Quasi-Solid-State Lithium-Metal Batteries.,Angewandte Chemie International Edition

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Interfacial Evolution of Lithium Dendrites and Their Solid Electrolyte Interphase Shells of Quasi-Solid-State Lithium-Metal Batteries.
Angewandte Chemie International Edition ( IF 16.1 ) Pub Date : 2020-06-30 , DOI: 10.1002/anie.202001117
Yang Shi _{1,

2} , Jing Wan _{1,

2} , Gui-Xian Liu _{1,

2} , Tong-Tong Zuo _{1,

2} , Yue-Xian Song _{1,

2} , Bing Liu _{2,

3} , Yu-Guo Guo _{1,

2} , Rui Wen _{1,

2} , Li-Jun Wan _{1,

2}

Affiliation

Unstable electrode/solid‐state electrolyte interfaces and internal lithium dendrite penetration hamper the applications of solid‐state lithium‐metal batteries (SSLMBs), and the underlying mechanisms are not well understood. Herein, in situ optical microscopy provides insights into the lithium plating/stripping processes in a gel polymer electrolyte and reveals its dynamic evolution. Spherical lithium deposits evolve into moss‐like and branch‐shaped lithium dendrites with increasing current densities. Remarkably, the on‐site‐formed solid electrolyte interphase (SEI) shell on the lithium dendrite is distinctly captured after lithium stripping. Inducing an on‐site‐formed SEI shell with an enhanced modulus to wrap the lithium precipitation densely and uniformly can regulate dendrite‐free behaviors. An in‐depth understanding of lithium dendrite evolution and its functional SEI shell will aid in the optimization of SSLMBs.

中文翻译：

准固态锂金属电池的锂枝晶及其固体电解质相间壳的界面演化

不稳定的电极/固态电解质界面和内部的锂枝晶渗透会阻碍固态锂金属电池（SSLMBs）的应用，其潜在的机理尚不清楚。本文中，原位光学显微镜提供了对凝胶聚合物电解质中锂电镀/剥离工艺的见解，并揭示了其动态演变。随着电流密度的增加，球形锂沉积物会演变成苔藓状和分支状的锂树枝状晶体。值得注意的是，剥离锂后，锂枝晶上的现场形成的固态电解质相间（SEI）壳被清晰地捕获。诱导具有增强模量的现场形成的SEI壳层，以均匀，均匀地包裹锂沉淀物，可以调节无枝晶的行为。

更新日期：2020-06-30

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