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Carbon coated Na3+xV2-xCux(PO4)3@C cathode for high-performance sodium ion batteries.
Lv, Zhiqiang; Zhang, Yanlei; Liu, Zhiqi; Qi, Xiang; Xu, Yanbin; Cui, Yuming; Xu, Wenlong; Yang, Zhenglong; Zheng, Qiong.
Afiliación
  • Lv Z; College of Chemistry and Materials Science, Ludong University, Yantai 264025, China. Electronic address: lvzhiqiang@ldu.edu.cn.
  • Zhang Y; College of Chemical Engineering, Fuzhou University, Fuzhou 350116, China.
  • Liu Z; Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China.
  • Qi X; College of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
  • Xu Y; College of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
  • Cui Y; College of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
  • Xu W; College of Chemistry and Materials Science, Ludong University, Yantai 264025, China.
  • Yang Z; College of Chemistry and Materials Science, Ludong University, Yantai 264025, China. Electronic address: yzl@iccas.ac.cn.
  • Zheng Q; Division of Energy Storage, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian 116023, China. Electronic address: zhengqiong@dicp.ac.cn.
J Colloid Interface Sci ; 666: 540-546, 2024 Jul 15.
Article en En | MEDLINE | ID: mdl-38613976
ABSTRACT
Na3V2(PO4)3 is considered as one of the most promising cathodes for sodium ion batteries owing to its fast Na+ diffusion, good structural stability and high working potential. However, its practical application is limited by its low intrinsic electronic conductivity. Herein, a carbon coated Cu2+-doped Na3V2(PO4)3 cathode was prepared. The carbon coating not only improve its apparent conductivity, but also inhibit crystal growth and prevent agglomeration of particles. Moreover, Cu2+ doping contributes to an enhanced intrinsic conductivity and decreased Na+ diffusion energy barrier, remarkably boosting its charge transfer kinetics. Based on the structure characterizations, electrochemical performances tests, charge transfer kinetics analyses and theoretical calculations, it's proved that such an elaborate design ensures the excellent rate performances (116.9 mA h g-1 at 0.1C; 92.6 mA h g-1 at 10C) and distinguished cycling lifespan (95.8 % retention after 300 cycles at 1C; 84.8 % retention after 3300 cycles at 10C). Besides, a two-phase reaction mechanism is also confirmed via in-situ XRD. This research is expected to promote the development of Na3V2(PO4)3-based sodium ion batteries with high energy/power density and excellent cycling lifespan.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
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XML
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Idioma: En Revista: J Colloid Interface Sci Año: 2024 Tipo del documento: Article Pais de publicación: Estados Unidos