| Download | - View accepted manuscript: Low equivalent weight short-side-chain perfluorosulfonic acid ionomers in fuel cell cathode catalyst layers (PDF, 1.5 MiB)
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| DOI | Resolve DOI: https://doi.org/10.1016/j.jpowsour.2011.03.024 |
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| Author | Search for: Lei, Chao1; Search for: Bessarabov, Dmitri; Search for: Ye, Siyu; Search for: Xie, Zhong1; Search for: Holdcroft, Steven1; Search for: Navessin, Titichai1 |
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| Affiliation | - National Research Council of Canada. NRC Institute for Fuel Cell Innovation
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| Format | Text, Article |
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| Subject | fuel cell; catalyst layer; short-side-chain ionomer; MEA; equivalent weight |
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| Abstract | The 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 AquivionTM ionomer displayed a similar morphology to the Nafion®-based CCLs. Electrochemical surface areas (ECSA) and double layer capacitances of all the AquivionTM-based samples were similar to those of the baseline. The oxygen reduction reaction (ORR) kinetics in CCLs with 20 wt% and 30 wt% AquivionTM 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 AquivionTM-based samples at low current densities. Relative to the baseline, CCLs containing 20 wt% AquivionTM 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. |
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| Publication date | 2011-03-22 |
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| In | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 19589005 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 5f48731f-a5d8-4734-b637-8f903366b0f6 |
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| Record created | 2012-03-03 |
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| Record modified | 2020-04-21 |
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