Chem. J. Chinese Universities ›› 2017, Vol. 38 ›› Issue (8): 1442.doi: 10.7503/cjcu20160839

• Physical Chemistry • Previous Articles     Next Articles

Preparation and Lithium Storage Performance of Nanostructured V2O5 with 0/1/2 Dimensional Hybrid Morphologies

XIE Zhiping, YAO Jinhuan, LIU Canzheng, JIANG Jiqiong, LI Yanwei   

  1. Guangxi Key Laboratory of Electrochemical and Magneto-chemical Functional Materials, College of Chemistry and Bioengineering, Guilin University of Technology, Guilin 541004, China
  • Received:2016-11-28 Revised:2017-07-17 Online:2017-08-10 Published:2017-07-17
  • Supported by:

    Supported by the National Natural Science Foundation of China(Nos.51664012, 51464009), the Guangxi Natural Science Foundation, China(No.2015GXNSFGA139006) and the Project of High-quality Course Construction for Postgraduate in Guilin University of Technology, China(No.105962014yzkc002).

Abstract:

Orthorhombic V2O5 nanomaterial with 0/1/2 dimensional hybrid morphologies(H-V2O5) was prepared by sol-gel method combined with freeze-drying technique using P123 as structure-directing agent. The microstructure and morphology of the prepared samples were analyzed by X-ray diffraction(XRD) and Scanning electron microscopy(SEM), and the lithium sto-rage performance was characterized by cyclic voltammetry(CV), constant current charge/discharge, and electrochemical impedance spectroscopy(EIS) tests. The results showed that H-V2O5 possessed high lithium sto-rage capacity, excellent cycling stability, and outstan-ding high rate capability. When cycled at a constant current density of 1 A/g, the H-V2O5 delivered a stable discharge capacity of 117.5 mA·h/g after 500 cycles, corresponding to capacity retention of 94.4%; even at a very high current density of 5 A/g, the H-V2O5 still showed a discharge capacity of 88.2 mA·h/g, which is much superior than that for two dimensional sheet-like V2O5 nanomaterial prepared without the assistance of P123.

Key words: Lithium-ion battery, Cathode material, V2O5, Nanomaterial, Lithium storage performance

CLC Number: 

TrendMD: