An air-stable single-crystal layered oxide cathode based on multifunctional structural modulation for high-energy-density sodium-ion batteries  

作　　者：Yi-Feng Liu Hai-Yan Hu Jia-Yang Li Hongrui Wang Yi Zhao Jingqiang Wang Yuan-Bo Wu Yan-Jiang Li Guang-Yu Zhang Qing-Qun Sun Yan-Fang Zhu Rui-Ren Tang Xiong-Wei Wu Jia-Zhao Wang Shi-Xue Dou Shu-Lei Chou Yao Xiao 

机构地区：[1]Institute for Carbon Neutralization,College of Chemistry and Materials Engineering,Wenzhou University,Wenzhou 325035,China [2]Wenzhou Key Laboratory of Sodium-Ion Batteries,Wenzhou University Technology Innovation Institute for Carbon Neutralization,Wenzhou 325035,China [3]College of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China [4]School of Chemistry and Materials Science,Hunan Agricultural University,Changsha 410128,China [5]Institute of Energy Materials Science,University of Shanghai for Science and Technology,Shanghai 200093,China [6]Key Laboratory of Advanced Energy Materials Chemistry(Ministry of Education),Nankai University,Tianjin 300071,China

出　　处：《Science China Chemistry》2024年第12期4242-4250,共9页中国科学（化学英文版）

基　　金：supported by the National Natural Science Foundation of China(52250710680,51971124,52171217,52202284);Hunan Provincial Science and Technology Innovation Major Project(2020GK1010-2020GK1014-4);Zhejiang Provincial Natural Science Foundation(LZ21E010001,LQ23E020002);Science and Technology Project of State Grid Corporation of China(5419-202158503A-0-5-ZN);Wenzhou key scientific and technological innovation research projects(ZG2023053);Wenzhou Natural Science Foundation(ZG2022032,G20220019,G20220021);Cooperation between industry and education project of Ministry of Education(220601318235513);State Key Laboratory of Electrical Insulation and Power Equipment,Xi’an Jiaotong University(EIPE22208);the China Scholarship Council(202106370062);Doctoral Innovation Foundation of Wenzhou University(3162023001001)。

摘　　要：P2-type layered oxide,Na_(2/3)Ni_(1/3)Mn_(2/3)O_(2),has drawn particular interest as a promising cathode material for sodium-ion batteries(SIBs)due to its fast sodium-ion transport channels with low migration potential.However,some catastrophic flaws,such as air instability,complicated multiphase evolution,and irreversible anionic redox,limit its electrochemical performance and hinder its application.Here,an air-stable single-crystal P2-type Na_(2/3)Ni_(1/3)Mn_(1/3)Ti_(1/3)O_(2)is proposed based on the multifunctional structural modulation of Ti substitution that could alleviate the issues for practical SIBs.As a result,the cathode with high energy density shows excellent air stability and highly reversible phase transitions(P2–OP4),and delivers faster kinetics and stable anion redox chemistry.Meanwhile,a thorough investigation of the relationship between structure,function,and properties is demonstrated,emphasizing formation processes,electrochemical behavior,structural evolution,and air stability.Overall,this study provides the direction of multifunctional structural modulation for the development of high-performance sodium-based layered cathode materials for practical applications.

关 键 词：sodium layered oxide cathodes single crystal multifunctional structural modulation controllable multiphase transition anionic redox chemistry 

分 类 号：TB34[一般工业技术—材料科学与工程] TM912[电气工程—电力电子与电力传动]