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An Armored Mixed Conductor Interphase on a Dendrite‐Free Lithium‐Metal Anode
Author(s) -
Yan Chong,
Cheng XinBing,
Yao YuXing,
Shen Xin,
Li BoQuan,
Li WenJun,
Zhang Rui,
Huang JiaQi,
Li Hong,
Zhang Qiang
Publication year - 2018
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201804461
Subject(s) - materials science , anode , faraday efficiency , electrolyte , dendrite (mathematics) , lithium fluoride , lithium (medication) , electrode , lithium metal , stripping (fiber) , interphase , metal , half cell , chemical engineering , ionic conductivity , composite material , inorganic chemistry , metallurgy , working electrode , chemistry , medicine , geometry , mathematics , engineering , biology , genetics , endocrinology
Lithium‐metal electrodes have undergone a comprehensive renaissance to meet the requirements of high‐energy‐density batteries due to their lowest electrode potential and the very high theoretical capacity. Unfortunately, the unstable interface between lithium and nonaqueous electrolyte induces dendritic Li and low Coulombic efficiency during repeated Li plating/stripping, which is one of the huge obstacles toward practical lithium‐metal batteries. Here, a composite mixed ionic/electronic conductor interphase (MCI) is formed on the surface of Li by in situ chemical reactions of a copper‐fluoride‐based solution and Li metal at room temperature. The as‐obtained MCI film acts like the armor of a soldier to protect the Li‐metal anode by its prioritized lithium storage, high ionic conductivity, and high Young's modulus. The armored MCI can effectively suppress Li‐dendrite growth and work effectively in LiNi 0.5 Co 0.2 Mn 0.3 O 2 /Li cells. The armored MCI presents fresh insights into the formation and regulation of the stable electrode–electrolyte interface and an effective strategy to protect Li‐metal anodes in working Li‐metal batteries.