期刊
JOURNAL OF POWER SOURCES
卷 485, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jpowsour.2020.229334
关键词
Slurry-coating; Lithium metal anodes; Fluorine-doped carbon; Lithium metal host; Lithium dendrites
资金
- Key Area Research and Development Program of Guangdong Province [2020B090919001]
- National Nature Science Foundation of China [21975289, 51871247, 21905306, U19A2019]
- Key Areas Research and Development Plan of Hunan Province [2019GK2033]
- Hunan Provincial Science and Technology Plan Project, China [2017TP1001, 2018RS3009]
- Fundamental Research Funds for Central Universities of the Central South University [2020zzts057]
- Open Project Program of Key Laboratory of Preparation and Application of Environmental Friendly Materials, Ministry of Education [2019006]
The 3D MNCu/FC structure promotes charge transfer, inhibits Li dendrite growth, and regulates uniform Li nucleation and deposition, leading to a dendrite-free lithium metal anode with enhanced electrochemical performance.
Lithium metal is regarded as a great promising anode for high energy density lithium-based batteries. Yet its practical application is severely restricted by uncontrollable growth of lithium dendrites and resultant potential safety hazard. Herein, an integrated architecture with 3D micro-nano structured Cu skeleton and crosslinked fluorine (F)-doped carbon nanofiber network (MNCu/FC) is constructed as host for lithium metal anode via a facile and scalable slurry-coating method. The conductive 3D architecture built by Cu skeleton and carbon network effectively promotes charge transfer and inhibits Li dendrites growth. Besides, the crosslinked F-doped carbon nanofibers act as lithiophilic seeds to regulate uniform Li nucleation and deposition, and superior lithiophilicity of F-doped carbon nanofiber is demonstrated via density functional theory calculation. As a result, the 3D MNCu/FC facilitates a dendrite-free lithium metal anode with lower lithium nucleation overpotential and enhanced electrochemical performance in half and full cells compared with bare Cu.
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