Electrochemical Performance of MEAs with Pt/SnO<sub>2</sub> Mixed with Conductive Fillers

Nagamatsu, Yohei; Kanda, Kohei; Noda, Zhiyun; Hayashi, Akari; Sasaki, Kazunari

doi:10.1149/06403.0207ecst

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Cell voltage at 200 mA/cm 2 turned out to be low for the 32 wt% and 20 wt% ionomer content. Extra Aquivion ® ionomer might reduce the porosity of the catalyst layer (12), leading to limited mass transfer. Or deficient Aquivion ® ionomer might result in low performance owing to reduced proton conductivity.…”

Section: Resultsmentioning

confidence: 99%

Investigation of Degradation at the PEFC Cathode Layer under Higher Temperature Operation

et al. 2016

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Toward the development of electrocatalysts for future higher temperature PEFCs, extraction of critical issues for higher temperature PEFCs was aimed. Degradation phenomena and mechanisms at 105 oC were evaluated for both Aquivion® MEA and Nafion® MEA. The correlation between proton conductivity and changes in cathode structures on the acceleration degradation test was studied in detail. As a result, even though the macroporous structure of the cathode layer was homogeneous in Aquivion® MEA, larger pores almost intensely formed near the Nafion® membrane side. We have found that the carbon oxidation reaction is deeply related to H2O produced by a fuel cell reaction if it is under the low humidification condition. Therefore, when proton conductivity is low like Nafion® MEA, H2O is mainly generated at the interface between the cathode layer and Nafion® membrane and carbon oxidation intensely occurs at the interface.

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Section: Resultsmentioning

confidence: 99%

Investigation of Degradation at the PEFC Cathode Layer under Higher Temperature Operation

et al. 2016

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“…electron transport in oxides may be one of the limiting factors for ORR, improvements in electronic conductivity may be helpful (i) by adding conductive fillers within electrocatalysts as the integrated electron-conduction pathway [14] or (ii) by mixing such conductive fillers within the porous electrocatalyst layers. [15] Summary Strategies, possibilities, and remaining issues in developing alternative Pt-decorated oxide electrocatalysts for PEFC cathode applications are specified and discussed, as an important research direction in PEFC electrocatalyst studies. Fig.…”

Section: Methodsmentioning

confidence: 99%