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Lithiophilic Cu‐CuO‐Ni Hybrid Structure: Advanced Current Collectors Toward Stable Lithium Metal Anodes
Author(s) -
Wu Shuilin,
Zhang Zhenyu,
Lan Minhuan,
Yang Shaoran,
Cheng Junye,
Cai Junjie,
Shen Jianhua,
Zhu Ying,
Zhang Kaili,
Zhang Wenjun
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.201705830
Subject(s) - faraday efficiency , overpotential , materials science , anode , nucleation , electrolyte , current collector , plating (geology) , lithium (medication) , chemical engineering , stripping (fiber) , current density , metal , electrode , electrochemistry , composite material , metallurgy , thermodynamics , chemistry , medicine , physics , engineering , quantum mechanics , endocrinology , geophysics , geology
Abstract Metallic lithium (Li) is a promising anode material for next‐generation rechargeable batteries. However, the dendrite growth of Li and repeated formation of solid electrolyte interface during Li plating and stripping result in low Coulombic efficiency, internal short circuits, and capacity decay, hampering its practical application. In the development of stable Li metal anode, the current collector is recognized as a critical component to regulate Li plating. In this work, a lithiophilic Cu‐CuO‐Ni hybrid structure is synthesized as a current collector for Li metal anodes. The low overpotential of CuO for Li nucleation and the uniform Li + ion flux induced by the formation of Cu nanowire arrays enable effective suppression of the growth of Li dendrites. Moreover, the surface Cu layer can act as a protective layer to enhance structural durability of the hybrid structure in long‐term running. As a result, the Cu‐CuO‐Ni hybrid structure achieves a Coulombic efficiency above 95% for more than 250 cycles at a current density of 1 mA cm −2 and 580 h (290 cycles) stable repeated Li plating and stripping in a symmetric cell.