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Nitrogen‐Doped Amorphous Zn–Carbon Multichannel Fibers for Stable Lithium Metal Anodes
Author(s) -
Fang Yongjin,
Zeng Yinxiang,
Jin Qi,
Lu Xue Feng,
Luan Deyan,
Zhang Xitian,
Lou Xiong Wen David
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202100471
Subject(s) - faraday efficiency , anode , materials science , nucleation , lithium (medication) , electrochemistry , carbon fibers , chemical engineering , cathode , amorphous carbon , current density , nitrogen , deposition (geology) , amorphous solid , nanotechnology , electrode , composite material , chemistry , crystallography , medicine , physics , organic chemistry , engineering , quantum mechanics , composite number , endocrinology , paleontology , sediment , biology
The application of lithium metal anodes for practical batteries is still impeded by safety issues and low Coulombic efficiency caused mainly by the uncontrollable growth of lithium dendrites. Herein, two types of free‐standing nitrogen‐doped amorphous Zn–carbon multichannel fibers are synthesized as multifunctional hosts for lithium accommodation. The 3D macroporous structures endow effectively reduced local current density, and the lithiophilic nitrogen‐doped carbon and functional Zn nanoparticles serve as preferred deposition sites with low nucleation barriers to guide uniform lithium deposition. As a result, the developed anodes exhibit remarkable electrochemical properties in terms of high Coulombic efficiency for more than 500 cycles at various current densities from 1 to 5 mA cm −2 , and symmetric cells show long‐term cycling duration over 2000 h. Moreover, full cells based on the developed anode and a LiFePO 4 cathode also demonstrate superior rate capability and stable cycle life.