Ultra‐Stable 3D‐Printed Zn Powder‐Based Anode Coated with a Conformal Ion‐Conductive Layer

Author:

Yang Jiayu123,Xu Xi12,Gao Yong1,Wang Yuxuan1,Cao Qinghe1,Pu Jie1,Bu Fan1,Meng Ting1,Guan Cao12ORCID

Affiliation:

1. Frontiers Science Center for Flexible Electronics Institute of Flexible Electronics Northwestern Polytechnical University Xi'an 710072 P. R. China

2. Key laboratory of Flexible Electronics of Zhejiang Provience Ningbo Institute of Northwestern Polytechnical University 315103 Ningbo China

3. Department of Materials Science and Engineering National University of Singapore Singapore 117576 Singapore

Abstract

AbstractZinc powder is promising for rechargeable zinc‐ion batteries due to its low cost and well tunability. However, the corrosion and the dendrite growth are much more serious in zinc powder than those in conventional zinc foils, which poses a significant obstacle to wide utilization. Herein, an ultra‐stable Zn powder‐based anode constructed by coating a conformal ion‐conductive hydrogel layer on 3D‐printed Zn scaffolds is reported. The interconnected hydrogel effectively redistributes the zinc ion flux and homogenizes the surface electric field, while the 3D architecture alleviates the stress from volume change at high current densities/capacities. As a result, the 3D Zn powder‐based symmetric cell steadily works for over 4700 h (>6 months) at a high current density/capacity of 5 mA cm−2/5 mAh cm−2, which is superior to previously reported Zn powder‐based anodes and bare Zn foil, providing a promising route for practical applications of low‐cost and large‐scale zinc‐ion batteries.

Funder

Fundamental Research Funds for the Central Universities

Key Technologies Research and Development Program

Publisher

Wiley

Subject

General Materials Science,Renewable Energy, Sustainability and the Environment

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