Spatial Control of Lithium Deposition by Controlling the Lithiophilicity with Copper(Ⅰ)Oxide Boundaries

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外文摘要：Spatial control of lithium deposition is the most important issue in lithium-metal batteries because of the considerable control of lithium dendrite suppression via the uniform distribution of Li+flux.Although seed materials are crucial for the behavior of lithium deposition,in-depth studies on their physical and chemical control have not been conducted.Here,we describe a new design of seed structure comprising a wrinkled Cu/graphene substrate surrounded by copper(Ⅰ)oxide(Cu2O)on a graphene grain boundary over a large area,which is fabricated by the oxidation of the Cu surface via graphene boundary defects by using chemical vapor deposition(CVD).Scanning and transmission electron microscopy results reveal that Cu2O on the graphene boundary can render a preferential reaction with lithium during the first deposition and assist in the uniform deposition of lithium by preventing the agglomeration of lithium clusters during the second deposition.This two-step process is attributed to the degree of selectivity due to the difference in lithium affinity,which allows long-term electrochemical stability and a high rate capability via boundary effects.This study highlights the significance of the boundary effect,which can open new avenues for the formation of a large family of seed structures in lithium-metal batteries.

外文关键词：

Cu2O boundarydendrite-free lithium depositionlithium-metal batterylithium spatial controlseed boundary effect

作者：

Ju Ye Kim、Oh B.Chae、Gukbo Kim、Woo-Bin Jung、Sungho Choi、Do Youb Kim、San Moon、Jungdon Suk、Yongku Kang、Mihye Wu、Hee-Tae Jung

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作者单位：

Department of Chemical and Biomolecular Engineering(BK-21 four)and Institute for Nanocentury,Korea Advanced Institute of Science and Technology(KAIST),Daejeon,Korea

Chemical & Process Technology Division,Korea Research Institute of Chemical Technology,Daejeon 34114,Korea

School of Engineering,Brown University,Providence 02912,USA

Department of Chemistry,University of Rhode Island,Kingston 02881,USA

School of Engineering and Applied Sciences,Harvard University,Cambridge 02138,USA

Advanced Materials Division,Korea Research Institute of Chemical Technology,Daejeon 34114,Korea

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基金：

Saudi Aramco-KAIST CO2 Management Center韩国国家研究基金会项目Ministry of Science,ICT,and Future Planning韩国国家研究基金会项目

项目编号：

2021K1A4A8A01079356NRF-2020M3H4A3081874

出版年：

2023

DOI：

10.1002/eem2.12392

能源与环境材料(英文)

CSCD

ISSN：

年,卷(期)：2023.6(5)

参考文献量43