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Yin, Yi-Chen; Wang, Qian; Yang, Jing-Tian; Li, Feng; Zhang, Guozhen; Jiang, Chen-Hui; Mo, Hong-Sheng; Yao, Ji-Song; Wang, Kun-Hua; Zhou, Fei; Ju, Huan-Xin; Yao, Hong-Bin
Nature communications, 04/2020, Volume: 11, Issue: 1Journal Article
Fabricating a robust interfacial layer on the lithium metal anode to isolate it from liquid electrolyte is vital to restrain the rapid degradation of a lithium metal battery. Here, we report that the solution-processed metal chloride perovskite thin film can be coated onto the lithium metal surface as a robust interfacial layer to shield the lithium metal from liquid electrolyte. Via phase analysis and density functional theory calculations, we demonstrate that the perovskite layer can allow fast lithium ion shuttle under a low energy barrier of 0.45 eV without the collapse of framework. Such perovskite modification can realize stable cycling of LiCoO |Li cells with an areal capacity of 2.8 mAh cm using thin lithium metal foil (50 μm) and limited electrolyte (20 μl mAh ) for over 100 cycles at 0.5 C. The metal chloride perovskite protection strategy could open a promising avenue for advanced lithium metal batteries.
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