Metal chloride perovskite thin film based interfacial layer for shielding lithium metal from liquid electrolyte

Yi-Chen Yin, Qian Wang, Jing-Tian Yang, Feng Li, Guozhen Zhang (), Chen-Hui Jiang, Hong-Sheng Mo, Ji-Song Yao, Kun-Hua Wang, Fei Zhou, Huan-Xin Ju () and Hong-Bin Yao ()
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Yi-Chen Yin: Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
Qian Wang: University of Science and Technology of China
Jing-Tian Yang: University of Science and Technology of China
Feng Li: Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
Guozhen Zhang: Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
Chen-Hui Jiang: University of Science and Technology of China
Hong-Sheng Mo: University of Science and Technology of China
Ji-Song Yao: University of Science and Technology of China
Kun-Hua Wang: University of Science and Technology of China
Fei Zhou: Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China
Huan-Xin Ju: PHI China Analytical Laboratory, CoreTech Integrated Limited
Hong-Bin Yao: Hefei National Laboratory for Physical Sciences at the Microscale, University of Science and Technology of China

Nature Communications, 2020, vol. 11, issue 1, 1-9

Abstract: Abstract 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 LiCoO2|Li cells with an areal capacity of 2.8 mAh cm−2 using thin lithium metal foil (50 μm) and limited electrolyte (20 μl mAh−1) for over 100 cycles at 0.5 C. The metal chloride perovskite protection strategy could open a promising avenue for advanced lithium metal batteries.

Date: 2020
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DOI: 10.1038/s41467-020-15643-9

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