A sustainable aqueous Zn-I2 battery

作     者：Chong Bai Fengshi Cai Lingchang Wang Shengqi Guo Xizheng Liu Zhihao Yuan 

作者机构：School of Materials Science and Engineering Tianjin University Tianjin 300072 China School of Materials Science and Engineering Tianjin Key Lab for Photoelectric Materials & Devices Tianjin University of Technology Tianjin 300384 China 

出 版 物：《Nano Research》 (纳米研究（英文版）)

年 卷 期：2018年第11卷第7期

页      面：3548-3554页

核心收录：

学科分类：0808[工学-电气工程] 081704[工学-应用化学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：This work was financially supported by the National Natural Science Foundation of China （Nos. 21171128 and 21603162）  Tianjin Sci. ＆ Tech. Program （No. 17JCYBJC21500）  and the Fundamental Research Funds of Tianjin University of Technology. 

主　　题：aqueous battery nanoporous carbon iodine zinc cycle life 

摘      要：Rechargeable metal-iodine batteries are an emerging attractive electrochemical energy storage technology that combines metallic anodes with halogen cathodes. Such batteries using aqueous electrolytes represent a viable solution for the safety and cost issues associated with organic electrolytes. A hybrid-electrolyte battery architecture has been adopted in a lithium-iodine battery using a solid ceramic membrane that protects the metallic anode from contacting the aqueous electrolyte. Here we demonstrate an eco-friendly, low-cost zinc-iodine battery with an aqueous electrolyte, wherein active I2 is confined in a nanoporous carbon cloth substrate. The electrochemical reaction is confined in the nanopores as a single conversion reaction, thus avoiding the production of I3- intermediates. The cathode architecture fully utilizes the active I2, showing a capacity of 255 mAh·g^-1 and low capacity cycling fading. The battery provides an energy density of -151 Wh·kg^-1 and exhibits an ultrastable cycle life of more than 1,500 cycles.