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dc.contributor.authorBessarabov, Dmitri
dc.contributor.authorHoldcroft, Steven
dc.contributor.authorLei, Chao
dc.contributor.authorNavessin, Titichai
dc.contributor.authorXie, Zhong
dc.contributor.authorYe, Siyu
dc.identifier.citationLei, C. et al. 2011. Low equivalent weight short-side-chain perfluorosulfonic acid ionomers in fuel cell cathode catalyst layers. Journal of power sources, 196(15):6168-6176. [ ]en_US
dc.identifier.issn1873-2755 (Online)
dc.description.abstractThe morphology and fuel cell performance of cathode catalyst layers (CCLs) using low equivalent weight (EW) short-side-chain (SSC) perfluorosulfonic acid ionomers have been investigated in this work. The results were compared with those for a baseline CCL containing 30 wt% of the conventional ionomer 1100 EW Nafion�. The CCLs fabricated with 10�20 wt% of the Aquivion� ionomer displayed a similar morphology to the Nafion�-based CCLs. Electrochemical surface areas (ECSA) and double layer capacitances of all the Aquivion�-based samples were similar to those of the baseline. The oxygen reduction reaction (ORR) kinetics in CCLs with 20 wt% and 30 wt% Aquivion� were lower than the baseline under 100% relative humidity (RH), yet similar to the baseline at 70% RH. In situ electrochemical impedance spectroscopy (EIS) measurements suggested that the lowered ORR kinetics at 100% RH may be attributed to the large mass transport resistance in Aquivion�-based samples at low current densities. Relative to the baseline, CCLs containing 20 wt% Aquivion� ionomer demonstrated an improvement in fuel cell performance under operating conditions of 95 �C and RH values of 30, 50 and 70%. The greater hydrophilicity of the SSC ionomers is believed to account for the improved fuel cell performance at the relatively higher operating temperature and dry conditions.en_US
dc.subjectFuel cellen_US
dc.subjectcatalyst layeren_US
dc.subjectshort-side-chain ionomeren_US
dc.subjectequivalent weighten_US
dc.titleLow equivalent weight short-side-chain perfluorosulfonic acid ionomers in fuel cell cathode catalyst layersen_US
dc.contributor.researchID22730389 - Bessarabov, Dmitri Georgievich

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