文献类型：期刊文献

英文题名：Multidentate Chelating Ligands Enable High-Performance Zinc-Bromine Flow Batteries

作者：Xia, Weicheng[1];Xie, Kunchi[2];Gao, Shang[1];Song, Zhen[2];Chen, Long[1];Li, Chunzhong[1,3]

机构：[1]East China Univ Sci & Technol, Sch Chem Engn, Key Lab Ultrafine Mat, Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[3]Shanghai Jiao Tong Univ, Sch Chem & Chem Engn, Dept Chem Engn, Shanghai 200240, Peoples R China

年份：2025

卷号：64

期号：6

外文期刊名：ANGEWANDTE CHEMIE-INTERNATIONAL EDITION

收录：;EI(收录号：20244717412399);WOS:【SCI-EXPANDED(收录号:WOS:001356861200001)】；

基金：This work was supported by the National Natural Science Foundation of China (22108075, U22B20143), the Science and Technology Commission of Shanghai Municipality (22dz1205900) Project supported by Shanghai Municipal Science and Technology Major Project.

语种：英文

外文关键词：zinc-bromine flow batteries; electrolyte additive; zinc dendrite; HER; EDTMPA

摘要：Zinc bromine flow battery (ZBFB) is a promising battery technology for stationary energy storage. However, challenges specific to zinc anodes must be resolved, including zinc dendritic growth, hydrogen evolution reaction, and the occurrence of "dead zinc". Traditional additives suppress side reactions and zinc dendrite formation by altering the solvation structure of Zn2+ and adsorbing onto the zinc surface through only a limited number of zincophilic sites, resulting in weak adsorption on zinc metal and potential inability to simultaneously optimize the solvation structure of zinc ions. Obviously, increasing the number of potential zincophilic sites in the additive can significantly enhance the interaction with zinc. Herein, we propose a strong chelate, ethylenediamine tetramethylene phosphonic acid (EDTMPA) as the additive, which boasts six potent zincophilic sites, not only promotes the formation of the water-deficient inner Helmholtz plane but also plays a crucial role in restructuring the solvation environment of Zn2+. As a result, the zinc symmetric flow battery with EDTMPA exhibited exceptional coulombic efficiency of 99.4 % over 800 cycles, surpassing the previous studies by a significant margin. Furthermore, the assembled ZBFB has showcased a dendrite-free and enduring cycling over 400 cycles at 80 mA cm-2.