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AlF3-Modified carbon nanofibers as a multifunctional 3D interlayer for stable lithium metal anodes
Cheng Guo1, Huijun Yang, Ahmad Naveed
1Shanghai Electrochemical Energy Devices Research Center, School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China. wangjiulin@sjtu.edu.cn.
Abstract:
A versatile interlayer in which AlF3 particles are embedded within carbon nanofibers (AlF3@CNFs) is reported to induce controllable Li+ deposition and achieve a dendrite free Li metal anode. Due to the AlF3 reducing Li nucleation overpotential and CNFs providing high Young's moduli up to 47 GPa, a high Coulombic efficiency (97.2%) and a long lifespan (900 h) are achieved in the carbonate-based electrolyte. A long cycling life is also realized by using interlayer-protected lithium anodes in Li-S batteries.
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