Acta Phys. -Chim. Sin. ›› 2024, Vol. 40 ›› Issue (12): 2407023.doi: 10.3866/PKU.WHXB202407023

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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)

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