Volume 58, Issue 44 pp. 15841-15847
Research Article

The Three-Dimensional Dendrite-Free Zinc Anode on a Copper Mesh with a Zinc-Oriented Polyacrylamide Electrolyte Additive

Qi Zhang

Qi Zhang

Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China

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Jingyi Luan

Jingyi Luan

Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China

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Liang Fu

Liang Fu

Collaborative Innovation Center for Green Development in Wuling Mountain Areas, Yangtze Normal University, Fuling, 408100 China

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Shengan Wu

Shengan Wu

Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China

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Prof. Yougen Tang

Prof. Yougen Tang

Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China

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Prof. Xiaobo Ji

Prof. Xiaobo Ji

Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China

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Prof. Haiyan Wang

Corresponding Author

Prof. Haiyan Wang

Hunan Provincial Key Laboratory of Chemical Power Sources, College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083 China

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First published: 22 August 2019
Citations: 816

Graphical Abstract

A dendrite-free zinc plating behavior was achieved by combining a Cu-Zn solid solution interface on a copper mesh skeleton and polyacrylamide electrolyte additive. The zinc ion has strong selective adsorption on the acyl group of polyacrylamide and can be transferred along the polymer chains, leading to the homogeneous zinc distribution.

Abstract

Rechargeable aqueous zinc-ion batteries have been considered as a promising candidate for next-generation batteries. However, the formation of zinc dendrites are the most severe problems limiting their practical applications. To develop stable zinc metal anodes, a synergistic method is presented that combines the Cu-Zn solid solution interface on a copper mesh skeleton with good zinc affinity and a polyacrylamide electrolyte additive to modify the zinc anode, which can greatly reduce the overpotential of the zinc nucleation and increase the stability of zinc deposition. The as-prepared zinc anodes show a dendrite-free plating/stripping behavior over a wide range of current densities. The symmetric cell using this dendrite-free anode can be cycled for more than 280 h with a very low voltage hysteresis (93.1 mV) at a discharge depth of 80 %. The high capacity retention and low polarization are also realized in Zn/MnO2 full cells.

Conflict of interest

The authors declare no conflict of interest.

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