首页|Realizing Highly Reversible Zinc Anode via Controlled-current Pre-deposition

Realizing Highly Reversible Zinc Anode via Controlled-current Pre-deposition

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Aqueous zinc ion batteries have been considered as the prominent candidate in the next-generation batteries for its low cost,safety and high theoretical capacity.Nonetheless,formation of zinc dendrites and side reactions at the electrode/electrolyte interface during the zinc plating/stripping process affect the cycling reversibility of the zinc anode.Regulation of the zinc plating/stripping process and realizing a highly reversible zinc anode is a great challenge.Herein,we applied a simple and effective approach of controlled-current zinc pre-deposition at copper mesh.At the current density of 40 mA cm-2,where the electron/ion transfers are both continuous and balanced,the Zn@CM-40 electrode with the(002)crystal plane orientation and the compactly aligned platelet morphology was successfully obtained.Compared with the zinc foil,the Zn@CM-40 exhibits greatly enhanced reversibility in the repeated plating/stripping(850 h at 1 mA cm-2)for the symmetric battery test.A series of characterization techniques including electrochemical analyses,XRD,SEM and optical microscopy observation,were used to demonstrate the correlation between the structure of pre-deposited zinc layer and the cycling stability.The COSMOL Multiphysics modeling demonstrates a more uniform electric field distribution in the Zn@CM than the zinc foil due to the aligned platelet morphology.Furthermore,the significant improvement is also achieved in a Zn||MnO2 full battery with a high capacity-retention(87％vs 47.8％).This study demonstrates that controlled-current electrodeposition represents an important strategy to regulate the crystal plane orientation and the morphology of the pre-deposited zinc layer,hence leading to the highly reversible and dendrite-free zinc anode for high-performance zinc ion batteries.

controlled-current pre-depositiondendrite-freereversible zinc anodezinc ion battery

Xinghang Chen、Ming Li、Qi Li、Yuzhu Chen、Buke Wu、Meng Lin、Qinyou An、Liqiang Mai

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State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Wuhan University of Technology,Hubei,Wuhan 430070,China

Foshan Xianhu Laboratory of the Advanced Energy Science and Technology,Guangdong Laboratory,Xianhu Hydrogen Valley,Foshan 528200,China

Department of Mechanical and Energy Engineering,Southern University of Science and Technology,Shenzhen 518055,China

SUSTech Energy Institute for Carbon Neutrality,Southern University of Science and Technology,Shenzhen China

Shenzhen Key Laboratory of Advanced Energy Storage,Southern University of Science and Technology,Shenzhen 518055,China

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National Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Key Research and Development Program of ChinaFoshan Xianhu Laboratory of the Advanced Energy Science and Technology Guangdong Laboratory

5207228552127816518722182020YFA0715000XHT2020-003

2023

10.1002/eem2.12480

能源与环境材料(英文)

能源与环境材料(英文)

CSCD
ISSN：
年,卷(期)：2023.6(6)
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