Hybrid ionic/electronic interphase enabling uniform nucleation and fast diffusion kinetics for stable lithium metal anode  

作　　者：Lun Li Pengxia Ji Meng Huang Zixin Zhang Hong Wang Francis Verpoort Jinlong Yang Daping He 

机构地区：[1]State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,School of Materials Science and Engineering,Wuhan University of Technology,Wuhan 430070,China [2]Guangdong Research Center for Interfacial Engineering of Functional Materials,College of Materials Science and Engineering,Shenzhen University,Shenzhen 518060,China [3]Sanya Science and Education Innovation Park of Wuhan University of Technology,Sanya 572000,China [4]Hubei Engineering Research Center of RF-Microwave Technology and Application,Wuhan University of Technology,Wuhan 430070,China [5]State Key Laboratory of Silicate Materials for Architectures,Wuhan University of Technology,Wuhan 430070,China

出　　处：《Chinese Chemical Letters》2024年第2期626-633,共8页中国化学快报（英文版）

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22279097,52172217);Natural Science Foundation of Guangdong Province(No.2021A1515010144);Shenzhen Science and Technology Program(No.JCYJ20210324120400002).

摘　　要：Lithium(Li)dendrite issue,which is usually caused by inhomogeneous Li nucleation and fragile solid electrolyte interphase(SEI),impedes the further development of high-energy Li metal batteries.However,the integrated construction of a high-stable SEI layer that can regulate uniform nucleation and facilitate fast Li-ion diffusion kinetics for Li metal anode still falls short.Herein,we designed an artificial SEI with hybrid ionic/electronic interphase to regulate Li deposition by in-situ constructing metal Co clusters embedded in LiF matrix.The generated Co and LiF both enable fast Li-ion diffusion kinetics,meanwhile,the lithiophilic properties of Co clusters can serve as Li-ion nucleation sites,thereby contributing to uniform Li nucleation and non-dendritic growth.As a result,a dendrite-free Li deposition with a low overpotential(16.1 mV)is achieved,which enables an extended lifespan over 750 h under strict conditions.The full cells with high-mass-loading LiFePO_(4)(11.5 mg/cm^(2))as cathodes exhibit a remarkable rate capacity of 84.1 mAh/g at 5 C and an improved cycling performance with a capacity retention of 96.4%after undergoing 180 cycles.

关 键 词：Lithium metal anode Hybrid ionic/electronic interphase Solid electrolyte interphase Fast diffusion kinetics Dendritic growth of lithium 

分 类 号：TM912[电气工程—电力电子与电力传动] O646.54[理学—物理化学]