An investigation of polypyrrole-LiV3O8 composite cathode materials for lithium-ion batteries

Authors

Chuanqi Feng, University of WollongongFollow
S Y. Chew, University of WollongongFollow
Z P. Guo, University of WollongongFollow
J Z. Wang, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow

RIS ID

74415

Publication Details

Feng, C. Q., Chew, S. Y., Guo, Z. P., Wang, J. Z. & Liu, H. K. (2007). An investigation of polypyrrole-LiV3O8 composite cathode materials for lithium-ion batteries. Journal of Power Sources, 174 (2), 1095-1099.

Abstract

A novel lithium trivanadate/polypyrrole (LiV₃O₈-PPy) composite, suitable for lithium-ion battery cathodes, was synthesized by dispersing LiV₃O₈ and PPy powders in ethanol followed by heating. The polypyrrole acts as a conducting matrix, a binder and an active material, as well as a volume change buffer agent, which holds the LiV₃O₈ particles in place during the charge/discharge cycles. The new material was characterized by scanning electron microscopy. It was found that polypyrrole particles were uniformly distributed among the LiV₃O₈ powders, which could significantly enhance the electrical conductivity and stability of the composite electrode. The composite containing 20 wt% PPy exhibits a good reversibility, higher coulombic efficiency and better cycle life than the bare LiV₃O₈ electrode.