Initiating High-Voltage Multielectron Reactions in NASICON Cathodes for Aqueous Zinc/Sodium Batteries

作     者：Jiasheng Yue Shuqiang Li Shi Chen Jingjing Yang Xueying Lu Yu Li Ran Zhao Chuan Wu Ying Bai 

作者机构：Beijing Key Laboratory of Environmental Science and EngineeringSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081PR China Yangtze Delta Region Academy of Beijing Institute of TechnologyJiaxing 314019PR China 

出 版 物：《Energy Material Advances》 (能源材料前沿（英文）)

年 卷 期：2023年第4卷第1期

页      面：426-437页

核心收录：

学科分类：0820[工学-石油与天然气工程] 0830[工学-环境科学与工程（可授工学、理学、农学学位）] 081704[工学-应用化学] 07[理学] 0817[工学-化学工程与技术] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0827[工学-核科学与技术] 0703[理学-化学] 

基　　金：National Natural Science Foundation of China(grant nos.22075028 and 22209013) China Postdoctoral Science Foundation(grant no.2022M710365) 

主　　题：stability substitution increment 

摘      要：Sodium superionic conductor(NASICON)is a class of compounds with robust polyanionic frameworks and high thermal stability,which are regarded as prospective cathodes candidates for secondary ***,NASICON cathodes typically have low discharge plateaus and low practical capacities in aqueous ***,Na_(3)V_(1.75)Fe_(0.25)(PO_(4))_(2)F_(3) is investigated as a cathode material for the aqueous zinc/sodium *** the addition of F helps with the improvement of NASICON structural stability,the low-cost Fe substitution has a positive impact on the capacity increment,reaction voltage increases,and cycling stability *** the Fe^(3+)substitution could induce a change in the spin magnetic moments of the 3d orbitals of the VO_(4)F_(2) and FeO_(4)F_(2) octahedra,the 2-electron reaction of V is activated,which are V^(4+)/V^(3+)and V^(5+)/V^(4+)redox *** a result,the novel Na_(3)V_(1.75)Fe_(0.25)(PO_(4))_(2)F_(3) cathode delivers a high operating voltage of 1.7 V,a high energy density of 209 W·h·kg^(−1) and stable lifespan(83.5%capacity retention after 6,000 cycles at 1 A·g^(−1))in the aqueous zinc/sodium *** research demonstrates the practicality of activating multielectron reactions to optimize the electrochemical properties of NASICON cathodes for aqueous secondary batteries.