Conformal, Nanoscale ZnO Surface Modification of Garnet-Based Solid-State Electrolyte for Lithium Metal Anodes
2016; American Chemical Society; Volume: 17; Issue: 1 Linguagem: Inglês
10.1021/acs.nanolett.6b04695
ISSN1530-6992
AutoresChengwei Wang, Yunhui Gong, Boyang Liu, Kun Fu, Yonggang Yao, Emily Hitz, Yiju Li, Jiaqi Dai, Shaomao Xu, Wei Luo, Eric D. Wachsman, Liangbing Hu,
Tópico(s)Advanced battery technologies research
ResumoSolid-state electrolytes are known for nonflammability, dendrite blocking, and stability over large potential windows. Garnet-based solid-state electrolytes have attracted much attention for their high ionic conductivities and stability with lithium metal anodes. However, high-interface resistance with lithium anodes hinders their application to lithium metal batteries. Here, we demonstrate an ultrathin, conformal ZnO surface coating by atomic layer deposition for improved wettability of garnet solid-state electrolytes to molten lithium that significantly decreases the interface resistance to as low as ∼20 Ω·cm2. The ZnO coating demonstrates a high reactivity with lithium metal, which is systematically characterized. As a proof-of-concept, we successfully infiltrated lithium metal into porous garnet electrolyte, which can potentially serve as a self-supported lithium metal composite anode having both high ionic and electrical conductivity for solid-state lithium metal batteries. The facile surface treatment method offers a simple strategy to solve the interface problem in solid-state lithium metal batteries with garnet solid electrolytes.
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