In-situ constructed SnO_(2) gradient buffer layer as a tight and robust interphase toward Li metal anodes in LATP solid state batteries  

作　　者：Lifan Wang Leiying Wang Qinlin Shi Cong Zhong Danya Gong Xindong Wang Chun Zhan Guicheng Liu 

机构地区：[1]State Key Laboratory of Advanced Metallurgy,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Beijing 100083,China [2]Department of Energy Storage Science and Engineering,School of Metallurgical and Ecological Engineering,University of Science and Technology Beijing,Bejing 100083,China [3]School of Energy Power and Mechanical Engineering,North China Electric Power University,Beijing 102206,China [4]Department of Physics,Dongguk University,Seoul 04620,Republic of Korea

出　　处：《Journal of Energy Chemistry》2023年第5期89-98,I0003,共11页能源化学（英文版）

基　　金：financially supported by the China Postdoctoral Science Foundation(2021M700396);the National Natural Science Foundation of China(52102206);the research grants from the National Research Foundation(2022K1A3A1A20014496 and 2022R1F1A1074707)funded by the government of the Republic of Korea。

摘　　要：Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3)(LATP),of much interest owing to its high ionic conductivity,superior air stability,and low cost,has been regarded as one of the most promising solid-state electrolytes for next-generation solid-state lithium batteries(SSLBs).Unfortunately,the commercialization of SSLBs is still impeded by severe interfacial issues,such as high interfacial impedance and poor chemical stability.Herein,we proposed a simple and convenient in-situ approach to constructing a tight and robust interface between the Li anode and LATP electrolyte via a SnO_(2)gradient buffer layer.It is firmly attached to the surface of LATP pellets due to the volume expansion of SnO_(2)when in-situ reacting with Li metal,and thus effectively alleviates the physical contact loosening during cycling,as confirmed by the mitigated impedance rising.Meanwhile,the as-formed SnO_(2)/Sn/LixSn gradient buffer layer with low electronic conductivity successfully protects the LATP electrolyte surface from erosion by the Li metal anode.Additionally,the LixSn alloy formed at the Li surface can effectively regulate uniform lithium deposition and suppress Li dendrite growth.Therefore,this work paves a new way to simultaneously address the chemical instability and poor physical contact of LATP with Li metal in developing low-cost and highly stable SSLBs.

关 键 词：Li_(1.3)Al_(0.3)Ti_(1.7)(PO_(4))_(3) All-solid-state lithium batteries Interfacial issues SnO_(2)gradient buffer layer Tight and robust interface 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ131.11[化学工程—无机化工]