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Lithium anode interlayer design for all-solid-state lithium-metal batteries

Zeyi Wang, Jiale Xia, Xiao Ji, Yijie Liu, Jiaxun Zhang, Xinzi He, Weiran Zhang, Hongli Wan () and Chunsheng Wang ()
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Zeyi Wang: University of Maryland
Jiale Xia: University of Maryland
Xiao Ji: University of Maryland
Yijie Liu: University of Maryland
Jiaxun Zhang: University of Maryland
Xinzi He: University of Maryland
Weiran Zhang: University of Maryland
Hongli Wan: University of Maryland
Chunsheng Wang: University of Maryland

Nature Energy, 2024, vol. 9, issue 3, 251-262

Abstract: Abstract All-solid-state lithium-metal batteries (ASSLBs) have attracted intense interest due to their high energy density and high safety. However, Li dendrite growth and high interface resistance remain challenging due to insufficient understanding of the mechanism. Here we develop two types of porous lithiophobic interlayer (Li7N2I–carbon nanotube and Li7N2I–Mg) to enable Li to plate at the Li/interlayer interface and reversibly penetrate into the porous interlayer. The experimental and simulation results reveal that a balance of lithiophobicity, electronic and ionic conductivities and interlayer’s porosity are the key enablers for stable Li plating/stripping at a high capacity. A fine-tuned Li7N2I–carbon nanotube interlayer enables Li/LNI/Li symmetric cell to achieve a high critical current density of 4.0 mA cm−2 at 4.0 mAh cm−2 at 25 °C; the Li7N2I–Mg interlayer enables a Li4SiO4@LiNi0.8Mn0.1Co0.1O2/Li6PS5Cl/20 µm-Li full cell to achieve an areal capacity of 2.2 mAh cm−2, maintaining 82.4% capacity retention after 350 cycles at 60 °C at a rate of 0.5 C. The interlayer design principle opens opportunities to develop safe and high energy ASSLBs.

Date: 2024
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DOI: 10.1038/s41560-023-01426-1

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