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Figure 7
Cross-section images of water distribution of two PEFCs. One contained a normal GDL with carbon paper (a)–(d), and the other contained a modified GDL at the cathode side (e)–(i). The modified GDL contained carbon paper and had a pinhole array perpendicular to the GDL. (a),(e) Raw images of these PEFCs before power generation. (b)–(d), (f)–(i) Water distribution images of each PEFC during power generation. Current densities were 120 mA cm−2 (b), 242 mA cm−2 (c), 346 mA cm−2 (d), 91 mA cm−2 (f), 152 mA cm−2 (g), 242 mA cm−2 (h) and 373 mA cm−2 (i). Pt nanopowder was used as the catalyst of these PEFCs. The sweep rate of current density was 0.4 mA cm−2 s. The scale bar is 5 mm.

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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