材料科学
锂(药物)
离子
铁磁性
沉积(地质)
弹道
化学工程
纳米技术
凝聚态物理
有机化学
物理
医学
古生物学
化学
天文
内分泌学
沉积物
工程类
生物
作者
Ming Liu,Jiangshan Ma,Xinyi Zhang,Li Wang,Yuqian Fan,Ailing Song,Guangjie Shao,Zhipeng Ma
标识
DOI:10.1002/adfm.202416527
摘要
Abstract Currently, the realization of controllable Li electrodeposits to further extend the cycling life of Li metal anode remains challenging. Herein, it is reported that carbon nanosheet array‐loaded ferromagnetic CoF 2 nanoparticles on carbon cloth (CC@CoF 2 /C) as an internal micro‐magnetic field source to manipulate the dynamic trajectory of Li + deposition via the magnetohydrodynamic effect. This approach ensures uniform lithium‐ion distribution and improves deep plating capacity, achieving a prolonged cycle life of the dendrite‐free Li anode. Finite element simulations, in situ characterizations, and electrochemical tests confirm that magnetic CoF 2 not only guides Li + migration through Lorentz force to prevent dendritic growth but also improves uniform Li deposition due to the in situ conversion of LiF‐rich solid electrolyte interphase during electroplating. Meanwhile, a CC@CoF 2 /C‐based half‐cell operates stably over 10 000 h at 1 mA cm −2 with a low 7.8 mV overpotential. When matched with a commercial LiFePO 4 cathode, the full cell reveals a high capacity of 122.96 mAh g −1 at a 2 C rate after 1000 cycles, retaining 91.95% capacity. The proposed strategy can be effectively expanded and adapted to investigate the deposition behavior of a wide range of metal anodes, offering a versatile and robust analytical framework for addressing diverse metal‐based electrochemical systems.
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