J. Mater. Sci. Technol. ›› 2021, Vol. 66: 97-102.DOI: 10.1016/j.jmst.2020.06.022

• Research Article • Previous Articles     Next Articles

A new active NaVMoO6 cathode material for rechargeable Li ion batteries

Chunmao Huanga, Shenghong Liua, Yang Wanga, Jingjie Fenga, Yanming Zhaoa,b,*()   

  1. aSchool of Physics, South China University of Technology, Guangzhou 510640, China
    bSouth China Institute of Collaborative Innovation, Dongguan 523808, China
  • Received:2020-02-29 Revised:2020-06-19 Accepted:2020-06-22 Published:2021-03-10 Online:2021-04-01
  • Contact: Yanming Zhao
  • About author:* School of Physics, South China University of Technology, Guangzhou 510640, China.E-mail address: zhaoym@scut.edu.cn (Y. Zhao).

Abstract:

Brannerite-type NaVMoO6 with vanadium (V5+) and molybdenum (Mo6+) elements in the highest valence states is synthesized by a sol-gel method using Na2CO3, NH4VO3, MoO3 and citric acid reagents. The results of X-ray diffraction (XRD) with Rietveld refinement and X-ray photoelectron spectroscopy (XPS) show that the obtained NaVMoO6 sample is single-phase. Novel electrode material (NaVMoO6) with layered structure is first utilized as cathode material for lithium ion batteries (LIBs). The NaVMoO6 electrode delivers reversible specific capacity of 126.4 mA h g-1 at 5 mA g-1 after 50 cycles. The stable structure of NaVMoO6 is corroborated by ex-situ XRD, suggesting that this material is considered as a prospective cathode for LIBs. This studying enriches the possibilities of molybdenum-based materials as cathodes for LIBs.

Key words: Lithium-ion batteries, Cathode materials, Electrochemical properties, Storage mechanism