物理化学学报 >> 2024, Vol. 40 >> Issue (12): 2407023.doi: 10.3866/PKU.WHXB202407023

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高性能三元NASICON型Na3.5−xMn0.5V1.5−xZrx(PO4)3/C钠离子电池正极材料

梅建宝1, 李贝1, 张舒2, 肖东东3, 胡朴1,*(), 张更4,*()   

  1. 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, 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, 岳阳 414006
  • 收稿日期:2024-07-25 修回日期:2024-09-12 录用日期:2024-09-12 发布日期:2024-11-09
  • 通讯作者: Email: hupu@wit.edu.cn; Tel: +86-15695688093 (胡朴)zhangziying04@163.com; Tel: +86-19310196711 (张更)
  • 基金资助:
    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)

Enhanced Performance of Ternary NASICON-Type Na3.5−xMn0.5V1.5−xZrx (PO4)3/C Cathodes for Sodium-Ion Batteries

Jianbao Mei1, Bei Li1, Shu Zhang2, Dongdong Xiao3, Pu Hu1,*(), Geng Zhang4,*()   

  1. 1 Hubei Key Laboratory of Plasma Chemistry and Advanced Materials, School of Materials Science and Engineering, Wuhan Institute of Technology, Wuhan 430205, China
    2 Qingdao Institute of Bioenergy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101, Shandong Province, China
    3 Institute of Physics, Chinese Academy of Sciences, Beijing 101400, China
    4 College of Mechanical Engineering, Hunan Institute of Science and Technology, Yueyang 414006, Hunan Province, China
  • Received:2024-07-25 Revised:2024-09-12 Accepted:2024-09-12 Published:2024-11-09
  • Contact: Email: hupu@wit.edu.cn; Tel: +86-15695688093 (Pu Hu)zhangziying04@163.com; Tel: +86-19310196711 (Geng Zhang)
  • Supported by:
    financially supported by the National Natural Science Foundation of China(52172227); Natural Science Foundation of Hubei Province(2023AFA114); The authors are grateful to the Startup Fund(20QD80); Graduated Innovative Fund of Wuhan Institute of Technology(CX2023068)

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Na3.5−xMn0.5V1.5−xZrx(PO4)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,Na3.4Mn0.5V1.4Zr0.1(PO4)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 mAh∙g−1),显著优于原始的Na3.5Mn0.5V1.5(PO4)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。

关键词: 钠离子电池, NASICON, 正极材料, 循环稳定性, 倍率性能

Abstract:

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 Na3.5−xMn0.5V1.5−xZrx(PO4)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. Na3.4Mn0.5V1.4Zr0.1(PO4)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 Na3.5Mn0.5V1.5(PO4)3/C. These advancements highlight a potential approach for developing efficient and sustainable SIBs.

Key words: Sodium-ion batteries, NASICON, Cathode materials, Cycling stability, Rate capability