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Lithiophilic and Antioxidative Copper Current Collectors for Highly Stable Lithium Metal Batteries
Author(s) -
Fu Ang,
Wang Chaozhi,
Peng Jian,
Su Min,
Pei Fei,
Cui Jingqin,
Fang Xiaoliang,
Li JianFeng,
Zheng Nanfeng
Publication year - 2021
Publication title -
advanced functional materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 6.069
H-Index - 322
eISSN - 1616-3028
pISSN - 1616-301X
DOI - 10.1002/adfm.202009805
Subject(s) - anode , materials science , current collector , cathode , copper , formate , passivation , current (fluid) , lithium (medication) , chemical engineering , metal , fabrication , electrode , layer (electronics) , inorganic chemistry , nanotechnology , electrolyte , metallurgy , electrical engineering , catalysis , chemistry , medicine , biochemistry , alternative medicine , pathology , endocrinology , engineering
Designing copper (Cu) current collectors is a convenient way to stabilize lithium (Li) metal anodes. However, Cu current collectors and their derived Li/Cu anodes still face several obstacles, including lithiophobic and oxidizable Cu surface, cumbersome anode fabrication process, and low Li utilization. Here, a formate‐treatment strategy is presented to reconstruct Cu current collectors with a passivation layer covered Cu(110) surface. This method can easily be generalized to increase the lithiophilicity and oxidation resistibility of Cu current collectors. Using the formate‐treated Cu nanowire network as an anode current collector, the full cell consisting of a LiFePO 4 cathode and Li/Cu anode with a low negative/positive capacity ratio delivers an excellent cycling performance with 74.8% capacity retention after 1000 cycles at 1 C. In addition, a concept of an upper current collector is introduced to simplify the manufacturing procedure of Li/Cu anodes. This work provides new insights into the design and construction of high‐performance Li/Cu anodes.