A Dynamically Ion‐Sieved Electrolyte towards Ultralong‐Lifespan Zn‐Ion Batteries

作者：Yuyao Ji, Qiang Hu, Jingxin Zhao, Cuiping Han, Hui–Ming Cheng · 发表于：Angewandte Chemie International Edition · 年份：2024 · DOI：10.1002/anie.202412853 · 被引用次数：19 · 研究领域：Advanced battery technologies research、Advanced Battery Materials and Technologies、Advancements in Battery Materials

Abstract The practical deployment of Zn‐ion batteries faces challenges such as dendrite growth, side reactions and cathode dissolution in traditional electrolytes. Here, we develop a highly conductive and dynamically ion‐sieved electrolyte to simultaneously enhance the Zn metal reversibility and suppress the cathode dissolution. The dynamic ion screen at the electrode/electrolyte interface is achieved by numerous pyrane rings with a radius of 3.69 Å, which can selectively facilitate the plating/stripping and insertion/extraction process of [Zn(H 2 O) 6 ] 2+ and Zn 2+ on the anode and cathode surfaces. As a proof of concept, Zn//Zn symmetric cells deliver exceptional cyclic stability for over 6,800 h and ultrahigh cumulative plated capacity of 1.95 Ah cm −2 . Zn//Na 2 Mn 3 O 7 cells exhibit satisfactory cycling performance with capacity retention of 82.7 % after 4,000 cycles, and the assembled pouch cells achieve excellent stability and durability. This work provides valuable insights into the development of electrolytes aimed at enhancing the interface stability of aqueous batteries.