Magnetically oriented nanosheet interlayer for dynamic regeneration in lithium metal batteries

• 成果类型: Article
• 署名作者: Ju, Zhengyu; Zheng, Tianrui; Zhang, Bowen; Dolocan, Andrei; Marschilok, Amy C.; Takeuchi, Esther S.; Takeuchi, Kenneth J.; Yu, Guihua
• 署名单位: University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin; University of Texas System; University of Texas Austin; State University of New York (SUNY) System; Stony Brook University; State University of New York (SUNY) System; Stony Brook University; United States Department of Energy (DOE); Brookhaven National Laboratory; State University of New York (SUNY) System; Stony Brook University
• 刊物名称: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
• ISSN/ISSBN: 0027-12537
• DOI: 10.1073/pnas.2413739121
• 发表日期: 2024-10-29
• 关键词: high-energy

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 parallel to Li symmetric cell stably operates for 350 h at 2 mA cm(-2) and 2 mA h cm(-2), similar to 5 times that of the cell with the pristine electrolyte. Furthermore, the cycling stability can be significantly extended in the Li parallel to 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.