期刊
CHEMICAL ENGINEERING JOURNAL
卷 452, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.139605
关键词
Zn-ion battery; Wearable; Hydrogel electrolyte; Soaking-free
In this study, a soaking-free and self-healing hydrogel electrolyte was developed for advanced wearable Zn-ion batteries. The hydrogel exhibits high safety, good mechanical durability, and stable energy outputs under harsh environments.
The rapid expansion of wearable electronic market has boosted the requirement of flexible energy storage de-vices. Currently, challenges still exist in designing high-performance flexible batteries with high-safety and good mechanical durability. Herein, we develop a soaking-free and self-healing hydrogel electrolyte for advanced wearable Zn-ion batteries (ZIBs). During the hydrogel fabrication, Zn2+ ion is introduced as the cross-linking agent to trigger the double-network structure formation. Interestingly, Zn2+ can directly work as the charge carrier during battery operation by avoiding the traditional soaking process, which helps to address the Zn issues. After applying in the Zn/polyaniline (PANI) battery, this functional hydrogel guarantees a long lifespan of 2000 cycles under 3 A g-1 with a capacity retention of 94.6 %. Moreover, this hydrogel features an excellent self -repairability due to its supramolecular interactions, which enables its practicability. When assembling a Zn/ PANI pouch cell, it maintains the stable energy outputs under harsh environments, such as pressing, folding, squeezing, twisting, piercing, and hammering. Our work provides guidance for constructing soaking-free and self-healing hydrogels for next-generation wearable Zn-based batteries.
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