Highly Thermostable Interphase Enables Boosting High‐Temperature Lifespan for Metallic Lithium Batteries. Issue 15 (6th January 2023)

• Record Type: Journal Article
• Authors: Zheng, Jiale; Wang, Juncheng; Guo, Tianqi; Wang, Yao; Nai, Jianwei; Luo, Jianmin; Yuan, Huadong; Wang, Zhongchang; Tao, Xinyong; Liu, Yujing
• Is Part Of: Small. Volume 19:Issue 15(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2023-01-06
• Subjects: lifespan -- lithium metal anodes -- solid electrolyte interphase -- thermostability -- (trifluoromethyl)trimethylsilane; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.202207742
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: In consideration of high specific capacity and low redox potential, lithium metal anodes have attracted extensive attention. However, the cycling performance of lithium metal batteries generally deteriorates significantly under the stringent conditions of high temperature due to inferior heat tolerance of the solid electrolyte interphase (SEI). Herein, controllable SEI nanostructures with excellent thermal stability are established by the (trifluoromethyl)trimethylsilane (TMSCF3 )‐induced interface engineering. First, the TMSCF3 regulates the electrolyte decomposition, thus generating an SEI with a large amount of LiF, Li3 N, and Li2 S nanocrystals incorporated. More importantly, the uniform distributed nanocrystals have endowed the SEI with enhanced thermostability according to the density functional theory simulations. Particularly, the sub‐angstrom visualization on SEI through a conventional transmission electron microscope (TEM) is realized for the first time and the enhanced tolerance to the heat damage originating from TEM imaging demonstrates the ultrahigh thermostability of SEI. As a result, the highly thermostable interphase facilitates a substantially prolonged lifespan of full cells at a high temperature of 70 °C. As such, this work might inspire the universal interphase design for high‐energy alkali‐metal‐based batteries applicated in a high‐temperature environment. Abstract : To overcome the high‐temperature instability of the interface, TMSCF3 is employed to regulate the electrolyte decomposition for constructing the solid electrolyte interphase with ultrahigh thermostability. The highly thermostable interphase significantly extends the lifespan of full cells at a high temperature of 70 °C, which would provide inspiration for the rational design of high‐temperature and stable‐cycling high‐energy lithium batteries.