Ultrafast Metal Electrodeposition Revealed by In Situ Optical Imaging and Theoretical Modeling towards Fast‐Charging Zn Battery Chemistry

Metallic Zn is a preferred anode material for rechargeable aqueous batteries towards a smart grid and renewable energy storage. Understanding how the metal nucleates and grows at the aqueous Zn anode is a critical and challenging step to achieve full reversibility of Zn battery chemistry, especially...

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Published in:Angewandte Chemie (International ed.) Vol. 61; no. 14; pp. e202116560 - n/a
Main Authors: Cai, Zhao, Wang, Jindi, Lu, Ziheng, Zhan, Renming, Ou, Yangtao, Wang, Li, Dahbi, Mouad, Alami, Jones, Lu, Jun, Amine, Khalil, Sun, Yongming
Format: Journal Article
Language:English
Published: Germany Wiley Subscription Services, Inc 28.03.2022
Wiley
Edition:International ed. in English
Subjects:
Anodes
Aqueous Battery
Charging
Crystallography
Electrode materials
Electrodeposition
Electrodes
Electrolytic cells
Energy storage
Fast charging
INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Ion diffusion
Lithium
Manganese dioxide
Metals
Modelling
Rechargeable batteries
Renewable energy
Reversibility
Smart grid
Storage batteries
Ultrafast metal
Zinc
Zinc sulfate
Zn Anode
Zn battery
Fast-Charging
Electrodeposition
Reversibility
Aqueous Battery
Zn Anode
ISSN:1433-7851, 1521-3773, 1521-3773
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Summary:Metallic Zn is a preferred anode material for rechargeable aqueous batteries towards a smart grid and renewable energy storage. Understanding how the metal nucleates and grows at the aqueous Zn anode is a critical and challenging step to achieve full reversibility of Zn battery chemistry, especially under fast‐charging conditions. Here, by combining in situ optical imaging and theoretical modeling, we uncover the critical parameters governing the electrodeposition stability of the metallic Zn electrode, that is, the competition among crystallographic thermodynamics, kinetics, and Zn2+‐ion diffusion. Moreover, steady‐state Zn metal plating/stripping with Coulombic efficiency above 99 % is achieved at 10–100 mA cm−2 in a reasonably high concentration (3 M) ZnSO4 electrolyte. Significantly, a long‐term cycling‐stable Zn metal electrode is realized with a depth of discharge of 66.7 % under 50 mA cm−2 in both Zn||Zn symmetrical cells and MnO2||Zn full cells. Ultrafast metal electrodeposition in fast‐charging Zn batteries was investigated by in situ optical imaging and theoretical modeling. The critical parameters governing the electrodeposition stability of the metallic Zn electrode were uncovered, guided by which a highly reversible Zn metal electrode in an aqueous battery with a depth of discharge of 66.7 % at 50 mA cm−2 was achieved.
Bibliography:These authors contributed equally to this work.
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China Postdoctoral Science Foundation
USDOE Office of Science (SC)
AC02-06CH11357; 2018M640694; 2020T130223
Huazhong University of Science and Technology
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
ISSN:1433-7851
1521-3773
1521-3773
DOI:10.1002/anie.202116560