Eletrochemical characterization of PSSO3H/Pani composite for fuel cells applications / Caracterização eletroquimica do composito PSSO3H/PAni para aplicação em celulas a combustivel

AUTOR(ES)
DATA DE PUBLICAÇÃO

2005

RESUMO

The development of alternative materials for fuel cells applications consists on a tentative to produce commercially available fuel cells, by reduction of costs with their manufacturing and materials. This master dissertation presents an investigation on the polystyrene sulfonate/polyaniline composite, which is an alternative material with low cost of production, owing to fuel cells applications. The chemical, morphological and thermal properties were characterized by Infrared Spectroscopy, Scanning Electron Microscopy and Optical Microscopy, Differential Scanning Calorimetry (DSC) and Termogravimetry (TGA), respectively. The electrochemical properties were studied by correlating them with the structure of the material, by employment of the following techiques: Chronopotenciometry, Cyclic Voltammetry and Electrochemical Impedance Spectroscopy (EIS). The ionic conductivity of the composite was determined by the measurement of its resistance, and using a steady-state linear sweep current Galvanodynamic technique

ASSUNTO(S)

celulas a combustivel fuel cells impendance spectroscopy polymeric composites compositos polimericos espectroscopia da impendancia

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