Chinese Journal of Applied Chemistry

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Molybdenum Trioxide:A New Type Negative Electrode Material for Electric Energy Storage Devices Using Na+-based Organic Electrolytes

ZHAO Lipinga,CAI Xingnana,WANG Hongyub,QI Lib*()   

  1. aLiaoning Shihua University,Fushun,Liaoning 113001,China
    bState Key Laboratory of Electroanalytical Chemistry,Changchun Institute of Applied Chemistry,Chinese Academy of Sciences,Changchun,130022,China
  • Received:2016-06-07 Published:2017-02-27 Online:2017-02-27
  • Contact: QI Li
  • Supported by:
    Supported by the National Basic Research Program of China(No.2011CB935702, No.2012CB932800), the National Natural Science Foundation of China(No.21173206), Talent Scientific Research Fund of LSHU(No.2016XJJ-020)

Abstract:

Owing to the shortage of lithium resources, we investigated the sodium-ion storage device using MoO3 as the negative electrode materials. MoO3 was prepared through a simple method and characterized by X-ray diffraction(XRD), scanning electron microscopy(SEM) and transmission electron microscopy(TEM). MoO3 was used as the negative electrode materials for electric energy storage devices using Na+-based organic electrolytes. The charge storage mechanism at the MoO3 negative electrode was investigated by cyclic voltammetry and galvanostatic charge-discharge tests. A new type of electric energy storage devices was constructed with MoO3 as negative materials and activated carbon(or graphite) as positive materials. The electrochemical properties were studied in 1 mol/L NaPF6-propylene carbonate(PC). The MoO3/AC and MoO3/graphite devices owns the voltage ranges of 0~3.2 V and 0~3.5 V, energy densities of 31.6 Wh/kg and 53 Wh/kg, respectively. The long-cycling stabilities of both devices are superior to the AC/AC symmetric capacitor obviously. This kind of energy storage devices would be a good substitute for lithium-ion batteries.

Key words: molybdenum trioxide, activated carbon, graphite, negative electrode materials, electric energy storage devices