Oxygen vacancy-rich MoO_(3)nanorods as photocatalysts for photo-assisted Li-O_(2) batteries

作     者：Guiru Sun Daming Yang Zexu Zhang Yan Wang Wei Lu Ming Feng 

作者机构：Key Laboratory of Functional Materials Physics and Chemistry of the Ministry of EducationJilin Normal UniversityChangchun 130103China 

出 版 物：《Journal of Advanced Ceramics》 (先进陶瓷（英文）)

年 卷 期：2023年第12卷第4期

页      面：747-759页

核心收录：

学科分类：083002[工学-环境工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 07[理学] 081705[工学-工业催化] 08[工学] 070304[理学-物理化学(含∶化学物理)] 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）] 0703[理学-化学] 

基　　金：supported by the Jilin Province Science and Technology Department Program(Nos.YDZJ202101ZYTS047,YDZJ202201ZYTS304,20220201130GX,and 20200201187JC) the National Natural Science Foundation of China(Nos.52171210 and 21978110) the Science and Technology Project of Jilin Provincial EducationDepartment(Nos.JJJKH20210444KJ and JKH20220428KJ). 

主　　题：molybdenum trioxide(MoO_(3))nanorods oxygen vacancy photocatalyst photo-assistance lithium-oxygen(Li-O_(2))batteries 

摘      要：Photo-assisted lithium-oxygen(Li-O_(2))batteries have been developed as a new system to reduce a large overpotential in the Li-O_(2)batteries.However,constructing an optimized photocatalyst is still a challenge to achieve broad light absorption and a low recombined rate of photoexcited electrons and holes.Herein,oxygen vacancy-rich molybdenum trioxide(MoO_(3-x))nanorods are employed as photocatalysts to accelerate kinetics of cathode reactions in the photo-assisted Li-O_(2)batteries.Oxygen vacancies on the MoO_(3-x)nanorods can not only increase light-harvesting capability but also improve electrochemical activity for the cathode reactions.Under illumination,the photoexcited electrons and holes are effectively separated on the MoO_(3-x)nanorods.During discharging,activated O2 is reduced to Li_(2)O_(2)by the photoexcited electrons from the MoO_(3-x)nanorods.The photoexcited holes can promote the decomposition of Li_(2)O_(2)during subsequent charging.Accordingly,the photo-assisted Li-O_(2)batteries with the MoO_(3-x)nanorods deliver an ultralow overpotential of 0.22 V,considerable rate capability,and good reversibility.We think that this work could give a reference for the exploitation and application of the photocatalysts in the photo-assisted Li-O_(2)batteries.