This paper reports on the preliminary results concerning
the possible functioning of novel composite membranes based
on Porous Anodic Alumina in a H2/O2 fuel cell. The Anodic
Alumina Membranes (AAM) supports are suitable for
applications in miniaturized or thin film fuel cells. In fact they
offers the possibility to reduce the fuel cell structure to
micrometer sizes, thanks to the micromachining technology.
The thin film fuel cells have been fabricated by
impregnation of anodic porous alumina membranes (AAM)
with Cesium Hydrogen Sulphate, Nafion® and Phosphotungstic acid (PWA).
Porous alumina supports (50 µm thick and pore diameter
of 200 nm) were filled with the proton conductor and
characterized by means of Scanning Electron Microscopy
(SEM), X-ray diffraction (XRD) and thermal analysis (DTA).
The electrochemical characterization of impregnated AAM
was carried out by recording the polarization curves of a
hydrogen-oxygen fuel cell working at intermediate
temperatures (160 °C) for AAM/CsHSO4 membranes and at low temperatures (25÷80 °C) in humid atmosphere for
AAM/PWA and AAM/ Nafion® membranes.