A carbon nanofiber network for stable lithium metal anodes with high Coulombic efficiency and long cycle life

Li metal is considered one of the most promising candidates for the anode material in high-energy-density Li-ion batteries. However, the dendritic growth of Li metal during the plating/stripping process can severely reduce Coulombic efficiency and cause safety problems, which is a key issue limiting...

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Published inNano research Vol. 9; no. 11; pp. 3428 - 3436
Main Authors Zhang, Anyi, Fang, Xin, Shen, Chenfei, Liu, Yihang, Zhou, Chongwu
Format Journal Article
LanguageEnglish
Published Beijing Tsinghua University Press 01.11.2016
Springer Nature B.V
Subjects
Anodes
Atomic/Molecular Structure and Spectra
Biomedicine
Biotechnology
Carbon fibers
Chemistry and Materials Science
Condensed Matter Physics
Copper
Current density
Dendrites
Dendritic structure
Deposition
Efficiency
Electrode materials
Lithium
Lithium-ion batteries
Materials Science
Metals
Nanofibers
Nanotechnology
Networks
Rechargeable batteries
Research Article
lithium metal anode
lithium-ion batteries
carbon nanofiber
three-dimensional conductive network
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Summary:Li metal is considered one of the most promising candidates for the anode material in high-energy-density Li-ion batteries. However, the dendritic growth of Li metal during the plating/stripping process can severely reduce Coulombic efficiency and cause safety problems, which is a key issue limiting the application of Li metal anodes. Herein, we present a novel strategy for dendrite-free deposition of Li by modifying the Cu current collector with a three-dimensional carbon nanofiber （CNF） network. Owing to the large surface area and high conductivity of the CNF network, Li metal is inserted into and deposited onto the CNF directly, and no dendritic Li metal is observed, leaving a flat Li metal surface. With Li metal as the counter electrode for Li deposition, an average Coulombic efficiency of 99.9% was achieved for more than 300 cycles, at large current densities of 1.0 and 2.0 mA·cm^-2, and with a high Li loading of 1 mAh·cm^-2. The scalability of the preparation method and the impressive results achieved here demonstrate the potential for the application of our design to the future development of dendrite-free Li metal anodes.
Bibliography:Li metal is considered one of the most promising candidates for the anode material in high-energy-density Li-ion batteries. However, the dendritic growth of Li metal during the plating/stripping process can severely reduce Coulombic efficiency and cause safety problems, which is a key issue limiting the application of Li metal anodes. Herein, we present a novel strategy for dendrite-free deposition of Li by modifying the Cu current collector with a three-dimensional carbon nanofiber （CNF） network. Owing to the large surface area and high conductivity of the CNF network, Li metal is inserted into and deposited onto the CNF directly, and no dendritic Li metal is observed, leaving a flat Li metal surface. With Li metal as the counter electrode for Li deposition, an average Coulombic efficiency of 99.9% was achieved for more than 300 cycles, at large current densities of 1.0 and 2.0 mA·cm^-2, and with a high Li loading of 1 mAh·cm^-2. The scalability of the preparation method and the impressive results achieved here demonstrate the potential for the application of our design to the future development of dendrite-free Li metal anodes.
11-5974/O4
lithium-ion batteries,lithium metal anode,carbon nanofiber,three-dimensionalconductive network
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1998-0124
1998-0000
DOI:10.1007/s12274-016-1219-2