Design of a cationic accelerator enabling ultrafast ion diffusion kinetics in aqueous zinc-ion batteries  

作　　者：Yawei Xiao Qianqian Gu Haoyu Li Mengyao Li Yude Wang 

机构地区：[1]National Center for International Research on Photoelectric and Energy Materials,School of Materials and Energy,Yunnan University,Kunming 6500504,Yunnan,China [2]Key Laboratory of Ministry of Education for Advanced Materials in Tropical Island Resources,School of Chemistry and Chemical Engineering,Hainan University,Haikou 570228,Hainan,China [3]College of Chemical Engineering,Fuzhou University,Fuzhou 350108,Fujian,China [4]Yunnan Key Laboratory of Carbon Neutrality and Green Low-carbon Technologies,Yunnan University,Kunming 6500504,Yunnan,China

出　　处：《Journal of Energy Chemistry》2025年第1期377-384,共8页能源化学(英文版)

基　　金：National Natural Science Foundation of China (61761047 and 41876055);Program for Innovative Research Team (in Science and Technology) in University of Yunnan Province。

摘　　要：Aqueous zincion batteries are highly favored for grid-level energy storage owing to their low cost and high safety,but their practical application is limited by slow ion migration.To address this,a strategy has been developed to create a cation-accelerating electric field on the surface of the cathode to achieve ultrafast Zn^(2+)diffusion kinetics.By employing electrodeposition to coat MoS_(2)on the surface of BaV_(6)O_(16)·3H_(2)O nanowires,the directional builtin electric field generated at the heterointerface acts as a cation accelerator,continuously accelerating Zn^(2+)diffusion into the active material.The optimized Zn^(2+)diffusion coefficient in CC@BaV-V_(6)O_(16)·3H_(2)@MoS_(2)(7.5×10^(8)cm^(2)s^(-1)) surpasses that of most reported V-based cathodes.Simultaneously,MoS_(2)serving as a cathodic armor extends the cycling life of the Zn-CC@BaV_(6)O_(16)·3H_(2)@MoS_(2)full batteries to over 10000 cycles.This work provides valuable insights into optimizing ion diffusion kinetics for high-performance energy storage devices.

关 键 词：Internal electric field Cationic accelerator lon diffusion kinetics Cathode modification strategy Aqueous zinc ion battery 

分 类 号：TM9[电气工程—电力电子与电力传动]