高性能三元NASICON型Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C钠离子电池正极材料  

Enhanced Performance of Ternary NASICON-Type Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C Cathodes for Sodium-Ion Batteries

作　　者：梅建宝 李贝 张舒[2] 肖东东[3] 胡朴 张更 Jianbao Mei;Bei Li;Shu Zhang;Dongdong Xiao;Pu Hu;Geng Zhang(Hubei Key Laboratory of Plasma Chemistry and Advanced Materials,School of Materials Science and Engineering,Wuhan Institute of Technology,Wuhan 430205,China;Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101,Shandong Province,China;Institute of Physics,Chinese Academy of Sciences,Beijing 101400,China;College of Mechanical Engineering,Hunan Institute of Science and Technology,Yueyang 414006,Hunan Province,China)

机构地区：[1]武汉工程大学材料科学与工程学院,湖北省等离子体化学与先进材料重点实验室,武汉430205 [2]中国科学院青岛生物能源与生物过程技术研究所,山东青岛266101 [3]中国科学院物理研究所,北京101400 [4]湖南理工学院机械工程学院,湖南岳阳414006

出　　处：《物理化学学报》2024年第12期9-10,共2页Acta Physico-Chimica Sinica

基　　金：国家自然科学基金项目(52172227);湖北省自然科学基金项目(2023AFA114);启动基金(20QD80);武汉工程大学创新基金(CX2023068)项目资助。

摘　　要：钠离子电池被广泛研究用于储能应用,但实现同时具有高能量密度、稳定性和快速充放电性能的正极材料仍然是一个关键的挑战。本研究合成了一系列NASICON型Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C材料,并掺入Mn、V和Zr元素探讨其对电化学性能的影响。通过在Mn和V的基础上引入Zr,提出一种激活V4+/V5+氧化还原反应新的策略,从而提升能量密度。此外,Zr掺入通过拓宽离子通道并产生额外的钠离子空位,显著促进钠离子迁移,增强电极反应动力学和整体性能。结果表明,Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C材料表现出优异的循环稳定性,在800次循环后保持90%的容量,并具备高倍率性能(20C时,放电比容量为84 m Ah·g^(-1)),显著优于原始的Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C材料。该研究为开发高效且可持续钠离子电池提供了有效途径。Sodium-ion batteries(SIBs)are widely studied for energy storage applications,but achieving cathode materials with balanced high energy density,stability,and fast charge/discharge performance remains a key challenge.In this study,we successfully synthesized a series of NASICON-type Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C,incorporating Mn,V,and Zr to investigate their impact on electrochemical performance.By introducing Zr alongside Mn and V,we developed a novel strategy to activate V4+/V5+redox reactions,achieving high energy density.Moreover,this substitution promotes Na-ion migration by widening the migration pathways and generating additional Na vacancies,which greatly enhances electrode reaction kinetics and boosts overall performance.Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C demonstrates superior stability,retaining 90%of its capacity after 800 cycles,and delivers high-rate performance(84 mAh∙g^(−1)at 20C),significantly outperforming pristine Na_(3.5−x)Mn_(0.5)V_(1.5−x)Zrx(PO_(4))_(3)/C.These advancements highlight a potential approach for developing efficient and sustainable SIBs.

关 键 词：钠离子电池 NASICON 正极材料 循环稳定性 倍率性能 

分 类 号：O643[理学—物理化学]