A sustainable aqueous Zn-I2 battery  

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

机构地区：[1]School of Materials Science and Engineering, Tianjin University, Tianjin 300072, China [2]School of Materials Science and Engineering, Tianjin Key Lab for Photoelectric Materials & Devices, Tianjin University of Technology, Tianjin 300384, China

出　　处：《Nano Research》2018年第7期3548-3554,共7页纳米研究（英文版）

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.

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.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.

关 键 词：aqueous battery nanoporous carbon IODINE ZINC cycle life 

分 类 号：O646.1[理学—物理化学] TM911[理学—化学]