New insights into “dead lithium” during stripping in lithium metal batteries  

作　　者：Xiao-Ru Chen Chong Yan Jun-Fan Ding Hong-Jie Peng Qjang Zhang 

机构地区：[1]Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology,Department of Chemical Engineering,Tsinghua University,Beijing 100084 [2]China Advanced Research Institute of Multidisciplinary Science,School of Materials Science and Engineering,Beijing Institute of Technology,Beijing 100081 [3]China Department of Chemical Engineering,Stanford University,Stanford,CA 94305,USA

出　　处：《Journal of Energy Chemistry》2021年第11期289-294,I0007,共7页能源化学（英文版）

基　　金：This work was supported by the Beijing Municipal Natural Science Foundation(Z20J00043);the National Natural Science Foundation of China(21825501);the National Key Research and Development Program(2016YFA0202500);the Tsinghua University Initiative Scientific Research Program.

摘　　要：Lithium (Li) metal attributes to the promising anode but endures the low Columbic efficiency (CE) and safety issues from the inactive Li accumulation. The metallic Li which is isolated from the lithium anode (named dead Li^(0)) consists the major component of the inactive Li. We systematically and meticulously investigated the formation and evaluation of dead Li^(0) during stripping process from electron transfer, the oxidation of Li^(0) to Li^(+) and the diffusion of Li^(+) through solid electrolyte interphase (SEI). The above-mentioned processes were regulated by adjusting the contact sites of electron channels, the dynamic rate of conversion from Li^(0) to Li^(+), and the structure as well as components of SEI. The design principles for achieving less dead Li^(0) and higher CE are proposed as a proof of concept in lithium metal batteries. This new insight sheds a comprehensive light on dead Li^(0) formation and guides the next-generation safe batteries for future application.

关 键 词：Lithium metal batteries Dead lithium Lithium stripping Lithium dendrite growth Charge transfer 

分 类 号：TM912[电气工程—电力电子与电力传动] TG146.26[一般工业技术—材料科学与工程]