Affiliation:
1. Institute of Flexible Electronics Northwestern Polytechnical University Xi'an 710072 China
2. Key laboratory of Flexible Electronics of Zhejiang Province Ningbo Institute of Northwestern Polytechnical University 218 Qingyi Road Ningbo 315103 China
Abstract
AbstractZn powder‐based anodes are promising for flexible Zn‐ion batteries with large‐scale production, but the drawbacks such as dendrite growth and side reactions strictly hinder their wide application. Herein, a free‐standing Zn powder‐based anode with gradient particle size and porosity is facilely constructed for flexible Zn‐ion batteries. The gradient design not only optimizes the electric field distribution and the Zn‐ion flux but also induces ideal bottom‐up deposition and top‐down stripping behaviors of Zn, thus suppressing dendrite growth. As a result, the flexible gradient Zn powder anode can be stably cycled for 1250 h at 1 mA cm−2/1 mAh cm−2, and even at high current/capacity of 5 mA cm−2/5 mAh cm−2, it still achieves a long lifespan of 130 h, which outperforms its non‐gradient counterparts and most previous results from Zn powder‐based anodes. The gradient strategy is expected to inspire the extensive utilization of Zn powder‐based anodes for flexible energy storage devices.
Funder
National Key Research and Development Program of China
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
27 articles.
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