Synergy of in-situ heterogeneous interphases tailored lithium deposition

查看全文 作　　者：Yinuo [1,2]Li;Anjun [1,2]Hu;Xingdong [1]Gan;Miao [2]He;Jun [2]Zhu;Wei [2]Chen;Yin [1,2]Hu;Tianyu [2]Lei;Fei [2]Li;Yaoyao [2]Li;Yuxin [2]Fan;Fan [1,2]Wang;Mingjie [1,2]Zhou;An [3]Wen;Baihai [1,3]Li 机构地区：[1]School of Materials and Energy,University of Electronic Science and Technology of China,Chengdu 610054,China;[2]State Key Laboratory of Electronic Thin Film and Integrated Devices,University of Electronic Science and Technology of China,Chengdu 610054,China;[3]Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China,Huzhou 313001,China 出　　处：《Nano Research》索引2023年第16卷第6期,共9页 基　　金：supported by the National Natural Science Foundation of China(Nos.52003038 and 52192610);Startup funds of Yangtze Delta Region Institute(Huzhou),University of Electronic Science and Technology of China(No.U03210019). 摘　　要：The implementation of a robust artificial solid electrolyte interphase(ASEI)to replace the unstable natural SEI can regulate lithium deposition behaviors and avoid the safety hazards caused by dendrites permeation in lithium metal batteries.Despite of devoted efforts in tailoring components of ASEI,the intrinsic mechanism of interfacial synergy within the heterogeneous interphases has not been well elucidated yet.Herein,we show that the lithium plating/striping behaviors can be substantially enhanced(over 900 h with an overpotential of less than 20 mV at 1 mA·cm^(−2)in Li|Li symmetric cells and 146 cycles in anode-free cells)by regulating the heterogeneous interphases.This favorable ASEI composed of LiF and Li_(3)N components can be in-situ generated during cycling by large-scale fabricated fluorinated boron nitride coatings.Further,the synergy of each heterogeneous component within ASEI was explored theoretically and experimentally.Li_(3)N has high adsorption energy and low ion diffusion barrier,which facilitates the transport of lithium ions and avoids its local accumulation to evolve into dendrites.Both the substrate and LiF are interfacially stable with high electron tunneling barriers,preventing the electrolyte decomposition and parasitic reactions.Finally,the high stiffness of the boron nitride also ensures lithium dendrites are suppressed once they grow,providing a stable environment for long-term cycling of lithium metal batteries. 关 键 词：in-situ heterogeneous solid electrolyte interphase(SEI) lithium deposition dendrite-free first-principles calculations