Charge transportation in polyaniline/V2O5 composites

Química Nova

Huguenin, Fritz¹  Torresi, Roberto M.¹  Universidade de São Paulo, São Carlos¹  Universidade de São Paulo, São Paulo¹ 

关键词: nanocomposites;    V2O5;    polyaniline.;   

DOI  :  10.1590/S0100-40422004000300006

学科分类：化学（综合）

来源: Sociedade Brasileira de Quimica

【 摘 要 】

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.

【 授权许可】

Unknown