电解质
纳米片
阳极
材料科学
化学工程
锂(药物)
相间
再生(生物学)
纳米技术
金属
化学
电极
冶金
生物
医学
细胞生物学
工程类
内分泌学
物理化学
遗传学
作者
Zhengyu Ju,Tianrui Zheng,Bowen Zhang,Andrei Dolocan,Amy C. Marschilok,Esther S. Takeuchi,Kenneth J. Takeuchi,Guihua Yu
标识
DOI:10.1073/pnas.2413739121
摘要
Lithium (Li) metal has been recognized as a promising anode to advance the energy density of current Li-based batteries. However, the growth of the solid–electrolyte interphase (SEI) layer and dendritic Li microstructure pose significant challenges for the long-term operation of Li metal batteries (LMBs). Herein, we propose the utilization of a suspension electrolyte with dispersed magnetically responsive nanosheets whose orientation can be manipulated by an external magnetic field during cell operation for realizing in situ regeneration in LMBs. The regeneration mechanism arises from the redistribution of the ion flux and the formation of an inorganic-rich SEI for uniform and compact Li deposition. With the magnetic-field-induced regeneration process, we show that a Li||Li symmetric cell stably operates for 350 h at 2 mA cm −2 and 2 mA h cm −2 , ~5 times that of the cell with the pristine electrolyte. Furthermore, the cycling stability can be significantly extended in the Li||NMC full cell of 3 mA h cm −2 , showing a capacity retention of 67% after 500 cycles at 1C. The dynamic Li metal regeneration demonstrated here could bring useful design considerations for reviving the operating cells for achieving high-energy, long-duration battery systems.
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