Advanced search
Start date
Betweenand
Related content
(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Charge transportation in polyaniline/V2O5 composites

Full text
Author(s):
Fritz Huguenin [1] ; Roberto M. Torresi [2]
Total Authors: 2
Affiliation:
[1] Universidade de São Paulo. Instituto de Química de São Carlos
[2] Universidade de São Paulo. Instituto de Química
Total Affiliations: 2
Document type: Journal article
Source: Química Nova; v. 27, n. 3, p. 393-398, 2004-06-00.
Abstract

In this work, composites formed from a mixture of V2O5 and polyaniline (PANI) were investigated, for applications as cathode materials for secondary lithium batteries. Electrochemical quartz crystal microbalance (EQCM) data show that charge compensation in the [PANI]0.3V2O5 nanocomposite is achieved predominantly by Li+ migration. However, the charge compensation in the [PANI]V2O5 microcomposite occurs by Li+ and ClO4- transport. Electrochemical Impedance Spectroscopy (EIS) measurements reveal several benefits of nanohybrid formation, including the achievement of shorter ionic diffusion pathways, the higher diffusion rate of the lithium ion and also the higher electronic conductivity, which are responsible for a synergetic effect of the energy storage properties. (AU)