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3D Confinement Zinc Plating/Stripping with High Discharge Depth and Excellent High-Rate Reversibility

Abstract

Aqueous Zn-based batteries have been considered as a promising energy storage device for its high safety, low cost, nontoxicity, and high energy density. However, the poor cycle life-span and limited utilization of zinc anodes due to dendrite growth restrict the practical application of such batteries. Herein, we report the preparation of a Zn/carbon nanotube (Zn/CNT) foam, where zinc plating/stripping is confined in a robust 3D interconnected CNT network. When tested in symmetric cells, the Zn/CNT foam shows excellent cycling stability at high depth of discharge (DODZn, e.g. 100% capacity retention at DODZn<81% after hundreds of cycles) and at high current densities with low overpotentials and without dendrite formation, much outperforming zinc foils. As a result, aqueous Zn//MnO2 batteries assembled using the Zn/CNT foam as an anode exhibit high-rate and long-term cycling performance, resulting in a high energy density of 169 Wh kg−1 (1 C) and a high power density of 3.1 kW kg−1 (30 C). This 3D confinement strategy for zinc plating and stripping could help the development of high-energy-density and high-power zinc-based batteries.

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Supplementary files

Article information


Submitted
10 Mar 2020
Accepted
15 May 2020
First published
18 May 2020

J. Mater. Chem. A, 2020, Accepted Manuscript
Article type
Paper

3D Confinement Zinc Plating/Stripping with High Discharge Depth and Excellent High-Rate Reversibility

Y. Zhou, X. Wang, S. Xiaofan, S. Yanhong, C. Zhu, S. Zeng, X. Hao, P. Cao, L. Wang, J. Di and Q. Li, J. Mater. Chem. A, 2020, Accepted Manuscript , DOI: 10.1039/D0TA02791J

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