Interpenetrating network-reinforced gel polymer electrolyte for ultra-stable lithium−iodine batteries  

作　　者：Ying Jiang Peng Huang Minman Tong Bingxin Qi Tao Sun Zhongyun Xian Wen Yan Chao Lai 

机构地区：[1]School of Chemistry and Materials Science,Jiangsu Normal University,Xuzhou,Jiangsu,China

出　　处：《Carbon Energy》2024年第6期234-247,共14页碳能源（英文）

基　　金：Natural Science Foundation of the Jiangsu Higher Education Institutions of China,Grant/Award Number:22KJB150004;Natural Science Foundation of Jiangsu Province,Grant/Award Number:BK20200047;National Natural Science Foundation of China,Grant/Award Numbers:22209062,22222902;Youth Talent Promotion Project of Jiangsu Association for Science and Technology of China,Grant/Award Number:JSTJ-2022-023。

摘　　要：Li-I_(2) batteries have attracted much interest due to their high capacity,exceptional rate performance,and low cost.Even so,the problems of unstable Li anode/electrolyte interface and severe polyiodide shuttle in Li-I_(2) batteries need to be tackled.Herein,the interfacial reactions on the Li anode and I_(2) cathode have been effectively optimized by employing a well-designed gel polymer electrolyte strengthened by cross-linked Ti-O/Si-O(GPETS).The interpenetrating network-reinforced GPETS with high ionic conductivity(1.88×10^(-3)S cm^(-1)at 25℃)and high mechanical strength endows uniform Li deposition/stripping over 1800 h(at 1.0mA cm^(-2),with a plating capacity of 3.0mAh cm^(-2)).Moreover,the GPETS abundant in surface hydroxyls is capable of capturing soluble polyiodides at the interface and accelerating their conversion kinetics,thus synergistically mitigating the shuttle effect.Benefiting from these properties,the use of GPETS results in a high capacity of 207 mAh g^(-1)(1 C)and an ultra-low fading rate of 0.013%per cycle over 2000 cycles(5 C).The current study provides new insights into advanced electrolytes for Li-I_(2) batteries.

关 键 词：electrode/electrolyte interface gel polymer electrolytes lithium dendrites lithium−iodine batteries polyiodide shuttle 

分 类 号：TM912[电气工程—电力电子与电力传动] TQ317[化学工程—高聚物工业]