TY - JOUR
T1 - Nitrogen-Doped Amorphous Zn–Carbon Multichannel Fibers for Stable Lithium Metal Anodes
AU - Fang, Yongjin
AU - Zeng, Yinxiang
AU - Jin, Qi
AU - Lu, Xue Feng
AU - Luan, Deyan
AU - Zhang, Xitian
AU - Lou, Xiong Wen (David)
PY - 2021/4/6
Y1 - 2021/4/6
N2 - 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 LiFePO4 cathode also demonstrate superior rate capability and stable cycle life. © 2021 Wiley-VCH GmbH
AB - 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 LiFePO4 cathode also demonstrate superior rate capability and stable cycle life. © 2021 Wiley-VCH GmbH
KW - hollow nanostructures
KW - lithiophilic sites
KW - lithium metal anodes
KW - macroporous carbon fibers
KW - Zn nanoparticles
UR - http://www.scopus.com/inward/record.url?scp=85102062812&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85102062812&origin=recordpage
U2 - 10.1002/anie.202100471
DO - 10.1002/anie.202100471
M3 - RGC 21 - Publication in refereed journal
C2 - 33481323
SN - 1433-7851
VL - 60
SP - 8515
EP - 8520
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 15
ER -
