A Janus separator towards dendrite-free and stable zinc anodes for long-duration aqueous zinc ion batteries

作     者：Yan Sun Qinping Jian Tianshuai Wang Bin Liu Yuhan Wan Jing Sun Tianshou Zhao Yan Sun;Qinping Jian;Tianshuai Wang;Bin Liu;Yuhan Wan;Jing Sun;Tianshou Zhao

作者机构：Department of Mechanical and Aerospace EngineeringThe Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong 999077China Department of Mechanical and Energy EngineeringSouthern University of Science and TechnologyShenzhen 518055GuangdongChina School of Chemistry and Chemical EngineeringNorthwestern Polytechnical UniversityXi’an 710129ShaanxiChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2023年第81卷第6期

页      面：583-592,I0013页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 

基　　金：fully supported by the Research Grant Council Collaborative Research Fund of the Hong Kong Special Administrative Region China (C5031-20G) 

主　　题：Janus separator Sulfonated poly(arylene ether sulfone) Dendrite-free Side reaction suppression Aqueous zinc-ion batteries 

摘      要：Critical issues of Zn anodes including undesirable dendrites formation and parasitic reactions severely limit the reversibility and cyclability of Zn *** address these issues,a functional Janus separator with the structure of a mechanically strong sulfonated poly(arylene ether sulfone)(SPAES)dense layer composited on a porous glass fiber(GF)substrate is *** SPAES dense layer that faces the Zn anode containing abundant sulfonic acid groups effectively promotes the desolvation process of hydrated Zn ions,guides uniform Zn ion transfer,and blocks anions and water,contributing to dendrite-free and highly reversible Zn plating/stripping cycles,while the porous GF substrate retains high electrolyte *** a result,the Zn symmetric cell with the Janus separator demonstrates an ultralong cycling lifespan of over 2000 h at the areal capacity of 1 m A h cm^(-2),which is 23-fold superior to that with a pristine glass fiber separator(90 h).More impressively,the as-prepared Janus separator enables outstanding rate performance and excellent cycling stability of full Zn ion batteries with diverse cathode *** instance,when paired with the V_2O_(5)cathode,the full battery with a Janus separator attains an ultrahigh initial specific capacity of 416.3 m A h g^(-1)and capacity retention of 60%over 450 cycles at 1 A g^(-1),exceeding that with a glass fiber ***,this work provides a facile yet effective approach to mitigating the dendrites formation and ameliorating the parasitic reactions of Zn metal anodes for high-performance Zn ion batteries.