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Interfacial Evolution of Lithium Dendrites and Their Solid Electrolyte Interphase Shells of Quasi‐Solid‐State Lithium‐Metal Batteries
Author(s) -
Shi Yang,
Wan Jing,
Liu GuiXian,
Zuo TongTong,
Song YueXian,
Liu Bing,
Guo YuGuo,
Wen Rui,
Wan LiJun
Publication year - 2020
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.202001117
Subject(s) - electrolyte , dendrite (mathematics) , lithium (medication) , lithium metal , interphase , materials science , quasi solid , chemical engineering , stripping (fiber) , electrode , nanotechnology , chemistry , composite material , engineering , biology , dye sensitized solar cell , genetics , endocrinology , medicine , geometry , mathematics
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.