An Ultrathin Inorganic Molecular Crystal Interfacial Layer for Stable Zn Anode

Zn metal anode suffers from dendrite growth and side reactions during cycling, significantly deteriorating the lifespan of aqueous Zn metal batteries. Herein, we introduced an ultrathin and ultra‐flat Sb2O3 molecular crystal layer to stabilize Zn anode. The in situ optical and atomic force microscop...

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Bibliographic Details
Published in:Angewandte Chemie International Edition 2023-10, Vol.62 (40), p.e202309765-n/a
Main Authors: Xiao, Ping, Wu, Yu, Liu, Kailang, Feng, Xin, Liang, Jianing, Zhao, Yinghe, Wang, Chenggang, Xu, Xijin, Zhai, Tianyou, Li, Huiqiao
Format: Article
Language:English
Subjects:
Antimony trioxide
Crystals
Dendrite Growth
Deposition
Electrochemistry
Interfacial Layer
Life span
Microscopes
Molecular Crystal
Side reactions
Zinc
Zinc Metal Battery
Zn Anode
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Summary:Zn metal anode suffers from dendrite growth and side reactions during cycling, significantly deteriorating the lifespan of aqueous Zn metal batteries. Herein, we introduced an ultrathin and ultra‐flat Sb2O3 molecular crystal layer to stabilize Zn anode. The in situ optical and atomic force microscopes observations show that such a 10 nm Sb2O3 thin layer could ensure uniform under‐layer Zn deposition with suppressed tip growth effect, while the traditional WO3 layer undergoes an uncontrolled up‐layer Zn deposition. The superior regulation capability is attributed to the good electronic‐blocking ability and low Zn affinity of the molecular crystal layer, free of dangling bonds. Electrochemical tests exhibit Sb2O3 layer can significantly improve the cycle life of Zn anode from 72 h to 2800 h, in contrast to the 900 h of much thicker WO3 even in 100 nm. This research opens up the application of inorganic molecular crystals as the interfacial layer of Zn anode. An inorganic molecular crystalline Sb2O3 film with an ultrathin thickness of 10 nm serves as an effective protection layer for Zn anodes to enable uniform under‐layer Zn deposition with suppressed side reaction and tip growth effect, achieving a long‐term cycling lifespan over 1000 h.
ISSN:1433-7851
1521-3773
DOI:10.1002/anie.202309765