Molecular sieve based Janus separators for Li-ions redistribution to enable stable lithium deposition
作者机构：Hefei National Laboratory for Physical Sciences at the MicroscaleCAS Key Laboratory of Materials for Energy ConversionDepartment of Applied ChemistryUniversity of Science and Technology of ChinaHefei 230026China Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education)College of ChemistryNankai UniversityTianjin 300071China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第6期
页 面：5143-5152页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：the National Natural Science Foundation of China(Nos.U2032202,21975243 and 51672262) the National Program for Support of Topnotch Young Professional and the Fundamental Research Funds for the Central Universities(No.WK2060000026)
主 题：Janus separator molecular sieve redistribution lithium metal anode deposition
摘 要：During operation of a lithium metal battery,uneven lithium deposition often results in the growth of lithium dendrites and causes a rapid decay in battery performance and even leads to safety *** is still the main hurdle hindering the practical application of lithium metal *** report a new type of Janus separator fabricated by introducing a molecular sieve coating on the surface of the polypropylene separator that serves as a redistribution layer for lithium *** results show that using this layer,the growth of lithium dendrites can be largely inhibited and the battery performance greatly *** a typical Li||Cu half-cell with the Janus separator,the Coulombic efficiency of the lithium metal anode can be maintained at98.5%for over 500 *** cycling life span is also extended by a factor of 8 in the Li||Li symmetric ***,the high-strength coating improves the mechanical properties of the separator,thus enhancing *** effectiveness of our strategy is demonstrated by both the inhibited growth of lithium dendrites and the improved battery *** methodology could eventually be generalized for electrode protection in other battery systems.
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