Preparation and electrochemical performance of hollow-spherical polypyrrole/V2O5 composite

Authors

Yuan-hong Wang, Sichuan University, Chengdu, China
Heng Liu, Sichuan University, Chengdu,China
Ding ZHU, Sichuan University, Chengdu,China
Zaiping Guo, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
S. X. Dou, University of WollongongFollow

RIS ID

38147

Publication Details

Wang, Y., Liu, H., Zhu, D., Guo, Z., Liu, H. Dou, S. (2011). Preparation and electrochemical performance of hollow-spherical polypyrrole/V₂O₅ composite. Transactions of Nonferrous Metals Society of China (English Edition), 21 (6), 1303-1308.

Abstract

In order to improve the lower practical capacity and bad cyclability of crystalline V₂O₅ (c-V₂O₅), the vanadium oxide (V₂O₅) and polypyrrole (PPy) hybrid with hollow-spherical(HS) structure was studied. HS nanocomposite comprised of conductive polypyrrole and vanadium pentoxide (PPy/V₂O₅) was synthesized by polymerization of pyrrole monomer (Py) in the hollow-microspherical V₂O₅ host. This novel hybrid was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and tested as the cathode material for lithium-ion batteries (LIB) by galvanostatic cell cycling and electrochemical impedance spectroscopy (EIS). The hollow-spherical polypyrrole/vanadium oxide (HS-PPy/V₂O₅) composites, in which PPy molecules are intercalated between the layers of V₂O₅, exhibit slight reduced capacity and substantially improve cyclability and electrochemical activity compared with the pure HS-V₂O₅.