Highly Reversible Zinc Anode Enabled by Trifunctional Diethylenetriaminepentaacetic Acid Additive

作者：Shiya Lin, Zhao Wang, Yisha Guo, Neng Yu, Kai Guo, Xianfu Wang · 发表于：ACS Energy Letters · 年份：2024 · DOI：10.1021/acsenergylett.4c01646 · 被引用次数：44 · 研究领域：Advanced battery technologies research、Advanced Battery Materials and Technologies、Conducting polymers and applications

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 H 2 O 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 V 2 O 5 ||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.