∼2.5 nm pores in carbon-based cathode promise better zinc-iodine batteries

作     者：Yajun Hou Chuanzheng Zhu Qiang Wang Xiaomeng Zhao Kun Luo Zongshuai Gong Zhihao Yuan Yajun Hou;Chuanzheng Zhu;Qiang Wang;Xiaomeng Zhao;Kun Luo;Zongshuai Gong;Zhihao Yuan

作者机构：School of Materials Science and EngineeringTianjin Key Laboratory of Photoelectric Materials&DevicesTianjin University of TechnologyTianjin 300384China 

出 版 物：《Chinese Chemical Letters》 (中国化学快报（英文版）)

年 卷 期：2024年第35卷第5期

页      面：471-476页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the Tianjin Natural Science Foundation of China(Nos.20JCZDJC00280 and 20JCYBJC00380). 

主　　题：Zinc-iodine batteries Structure-performance relationship Iodine conversion chemistry Cathode materials Porous carbon 

摘      要：The relationship mechanism between the material pore structures and cathodic iodine chemistry plays a vital role in efficient Zn-I_(2) batteries,but is unclear,retarding further advances.This work innovatively indicates a great contribution of∼2.5nm pore structure of nanocarbons to efficient iodine adsorption,rapid I^(−)↔I_(2) conversion,and polyiodide inhibition,via scrupulously designing catalysts with controllable pore sizes systematically.The I_(2)-loading within the designed nitrogen-doped nanocarbons can reach up to as high as 60.8 wt%.The batteries based on the cathode deliver impressive performances with a large capacity of 178.8 mAh/g and long-term cycling stability more than 4000 h at 5.0 C.Notably,these is no polyiodide such as I_(3)−and I_(5)−detected during the charge-discharge processes from comprehensive electrochemical cyclic voltammetry,X-ray photoelectron spectroscopy,and Raman technique.This work provides a novel knowledge-guided concept for rational pore design,promising better Zn-I_(2) batteries,which is also hoped to benefit other advanced energy technologies,such as Li-S,Li-ion,and Al-I_(2) batteries.