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Figure 4
Some images for measuring the distribution and behaviour of water in the PEFC in which the MEA was composed of Nafion112 and porous Pt film, and the GDL was carbon cloth. (a) Photograph of the PEFC. The white square is the observed area. (b) Raw image of the PEFC before power generation. (c)–(e) Analysed images during measurement of the polarization curve, at a current sweep rate of 0.1 mA cm−2 s. The current densities were 7 mA cm−2 (c), 105 mA cm−2 (d) and 190 mA cm−2 (e). (f) An analysed image after flooding. This measurement was performed at BL19B2. The scale bar for (c)–(e) is 1 mm. The look-up table is represented by Ib/I, where Ib and I correspond to the X-ray intensity before and during power generation.

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 15| Part 4| May 2008| Pages 329-334
doi:10.1107/S0909049508006638
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