Highly Reversible Zinc Anode Enabled by Trifunctional Diethylenetriaminepentaacetic Acid Additive,ACS Energy Letters

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Highly Reversible Zinc Anode Enabled by Trifunctional Diethylenetriaminepentaacetic Acid Additive
ACS Energy Letters ( IF 19.3 ) Pub Date : 2024-08-29 , DOI: 10.1021/acsenergylett.4c01646
Shiya Lin ₁ , Wang Zhao ₂ , Yisha Guo ₁ , Neng Yu ₁ , Kai Guo ₁ , Xianfu Wang ₃

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Rechargeable aqueous zinc-ion batteries (AZIBs) are promising energy storage systems. However, dendrite growth and side reactions on the zinc anode compromise the Coulombic efficiency (CE) and limit the lifespan, posing constraints on the development of AZIBs. Herein we introduce a trifunctional additive, diethylenetriaminepentaacetic acid (DTPA), into the electrolyte, which forms a “shielding effect” layer on the zinc surface, replaces the coordinated H₂O molecules in the solvation sheath of zinc ions, and moderates the rise in pH of the electrolyte, causing great enhancement in the reversibility and cycling life of the zinc anode. The Zn||Zn symmetric cell with 1.5 wt % DTPA achieves a prolonged cycle life of 5000 h. The V₂O₅||Zn full battery, with the addition of DTPA, demonstrated enhanced rate performance and cycling stability. This work provides a straightforward, environmentally friendly, and economically feasible strategy for achieving a highly stable AZIB.

中文翻译：

三官能二乙烯三胺五乙酸添加剂实现的高度可逆锌阳极

可充电水性锌离子电池（AZIB）是有前景的储能系统。然而，锌阳极上的枝晶生长和副反应会损害库仑效率（CE）并限制寿命，从而限制了AZIB的发展。在此，我们在电解液中引入了三官能添加剂二亚乙基三胺五乙酸（DTPA），它在锌表面形成了“屏蔽效应”层，取代了锌离子溶剂化鞘中的配位H ₂ O分子，减缓了锌离子的升高。电解质的pH值，导致锌阳极的可逆性和循环寿命大大提高。具有 1.5 wt% DTPA 的 Zn||Zn 对称电池实现了 5000 小时的延长循环寿命。添加DTPA的V ₂ O ₅ ||Zn全电池表现出增强的倍率性能和循环稳定性。这项工作为实现高度稳定的 AZIB 提供了一种简单、环保且经济可行的策略。

更新日期：2024-08-29

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