Ji Yuyao, Hu Qiang, Zhao Jingxin, Han Cuiping, Cheng Hui-Ming
College of Chemistry and Materials Science, Sichuan Normal University, 610066, Chengdu, Sichuan, P. R. China.
School of Materials and Energy, University of Electronic Science and Technology of China, 610054, Chengdu, P. R. China.
Angew Chem Int Ed Engl. 2025 Jan 2;64(1):e202412853. doi: 10.1002/anie.202412853. Epub 2024 Oct 25.
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(HO)] and Zn 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. Zn//NaMnO 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.
锌离子电池的实际应用面临着诸如枝晶生长、副反应以及在传统电解质中阴极溶解等挑战。在此，我们开发了一种高导电性且具有动态离子筛分功能的电解质，以同时提高锌金属的可逆性并抑制阴极溶解。电极/电解质界面处的动态离子筛是由众多半径为3.69 Å的吡喃环实现的，这些吡喃环能够选择性地促进[Zn(HO)]和Zn在阳极和阴极表面的电镀/脱镀以及嵌入/脱出过程。作为概念验证，锌//锌对称电池具有超过6800小时的出色循环稳定性以及1.95 Ah cm的超高累积镀覆容量。锌//NaMnO电池展现出令人满意的循环性能，在4000次循环后容量保持率为82.7%，并且组装的软包电池具有出色的稳定性和耐久性。这项工作为旨在增强水系电池界面稳定性的电解质开发提供了有价值的见解。
