Lithiophilic Multichannel Layer to Simultaneously Control the Li-Ion Flux and Li Nucleation for Stable Lithium Metal Batteries
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초록
내용
Lithium metal is a promising anode material for next-generation high-energy-density batteries due to its high theoretical specific capacity (3860 mAh g−1), but practical use is challenged by issues with lithium nucleation and growth. This presentation introduces a lithiophilic multichannel layer (LML) that controls lithium nucleation and growth in lithium-metal batteries. The LML, made from Ag-plated Al2O3 nanoparticles via electroless plating, provides numerous channels for uniform lithium-ion diffusion on a nonwoven separator. The lithiophilic Ag on the anode surface reduces overpotential during lithium nucleation, promoting dense lithium deposition. The LML enables LiNi0.8Co0.1Mn0.1O2 || Li cells to maintain over 75% capacity after 100 cycles at a high charge/discharge rate of 5.0 C with a cutoff voltage of 4.4 V, achieving an ultrahigh energy density of 1164 Wh kg−1.