The membrane electrode assembly (MEA) is made up of an AEM
and anode/cathode electrodes. In this study, membrane Awas used
as the AEM for the test. The anode/cathode electrodes consisted of
anode/cathode catalyst layers (Pt/C, 40 wt% Pt, Johnson Mathey)
and diffusion layers (Teflon-treated carbon paper, Toray-250). The
ionomer solution (5 wt%) was prepared using the OH form
membrane A, which was mixed with the catalyst powder and isopropanol
to prepare the catalyst ink for the electrode. The ink in
which the weight ratio of catalyst to ionomer was 7:3, was stirred
continuously for 24 h until the uniform mixturewas obtained. Then
the catalyst ink was sprayed onto the Teflon-treated carbon paper
to prepare the resulting electrode with an active area of
2.5 2.5 cm2 and a catalyst loading of 1 mg cm2. The AEM
sandwiched between the anode and cathode electrodes was hotpressed
at 0.5 MPa for 5 min at 60 C to obtain MEA for fuel cell test