Authors: Hao Wu, Hong‐Ting Yin, Jin‐Lin Yang, Ruiping Liu
Published: 2025-04-28
Source: Full article
AbstractThe detrimental dendrite growth and hydrogen evolution corrosion on Zn metal anode greatly hinder the implement of aqueous zinc batteries. Constructing a stable solid electrolyte interphase (SEI) on Zn anode is considered an effective strategy to prolong the cells life. Herein, by using poly(N‐[2‐(3,4‐dihydroxyphenyl)ethyl]‐2‐methylacrylamide) (PDMA) as a case study, the impact of Zn2+ chelation effect on SEI layer generation is systematically investigated. The DMA monomer tends to form a robust PDMA layer on Zn anode with a higher crosslinking degree with the assistant of Zn2+. The Zn─O interaction between Zn metal and PDMA guarantees the long‐term protection efficiency of the SEI layer and uniformizes the Zn nucleation. Moreover, the Zn2+ desolvation can be propelled by the zincophilic hydroxyl groups in PDMA. As expected, the Zn symmetric cell with in‐PDMA showcases an extended lifespan of over 3800 h. The Zn||NVO full cell maintains a capacity of 150 mAh g−1 after 1000 cycles at 1 A g−1. This work is believed to guide the future aqueous Zn anode design based on the protective layer engineering.