Characterization of Polymer Electrolyte Fuel Cells by Neutron Scattering During Operation in a Segmented Electrode Cell

2013 ◽  
Vol 70 (3) ◽  
pp. 94-101
Author(s):  
Satoru UEDA ◽  
Mika EGUCHI ◽  
Yoshio KOBAYASHI ◽  
Yasuyuki TSUTSUMI ◽  
Ananda PUTRA ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Neutron Scattering ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells ◽  
Electrode Cell ◽  
Segmented Electrode

Activation and characterization of Fe-based catalysts for the reduction of oxygen in polymer electrolyte fuel cells

1998 ◽  
Vol 43 (14-15) ◽  
pp. 1969-1984 ◽  
Author(s):  
G. Faubert ◽  
R. Côté ◽  
D. Guay ◽  
J.P. Dodelet ◽  
G. Dénès ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Polymer Electrolyte Fuel Cells

Characterization of Anion Exchange Ionomers in Hybrid Polymer Electrolyte Fuel Cells

ChemSusChem ◽  
2010 ◽  
Vol 3 (12) ◽  
pp. 1398-1402 ◽  
Author(s):  
Murat Ünlü ◽  
Junfeng Zhou ◽  
Irene Anestis-Richard ◽  
Paul A. Kohl
Keyword(s):  
Fuel Cells ◽  
Polymer Electrolyte ◽  
Anion Exchange ◽  
Polymer Electrolyte Fuel Cells ◽  
Hybrid Polymer

scholarly journals Microstructure and water distribution in catalysts for polymer electrolyte fuel cells, elucidated by contrast variation small-angle neutron scattering

2019 ◽  
Vol 52 (4) ◽  
pp. 791-799 ◽  
Author(s):  
Satoshi Koizumi ◽  
Satoru Ueda ◽  
Takumi Inada ◽  
Yohei Noda ◽  
Robert A. Robinson
Keyword(s):  
Fuel Cells ◽  
Neutron Scattering ◽  
Polymer Electrolyte ◽  
Small Angle ◽  
Small Angle Neutron Scattering ◽  
Water Distribution ◽  
Grazing Incidence ◽  
Polymer Electrolyte Fuel Cells ◽  
Contrast Variation ◽  
Mixed Water

By using small-angle neutron scattering (SANS) reinforced by scanning electron microscopy, the fine structure of catalysts for polymer electrolyte fuel cells has been investigated. The experimental data resulting from contrast variation with mixed light and heavy water (H2O/D2O) are well described by a core–shell model with fluctuations in concentration between water and Nafion. In particular, SANS obtained with the mixed water ratio 30/70, which corresponds to a matching point between mixed water and Nafion, shows a broad scattering maximum, which is attributed to a 5 nm-thick Nafion shell on the surface of the larger carbon particles. After swelling by water, the ionomer layer absorbs water at the 17 wt% level. By changing the H2O/D2O ratio, it was further confirmed that the catalyst with the ionomer exhibits water repellence, whereas the bare catalyst without the ionomer is wetted by water. Because it is very difficult to extract more information, for instance regarding the Pt–Nafion interactions, by means of small-angle scattering, reflectometry and grazing-incidence scattering experiments with neutrons should be attempted on a model catalyst prepared on a flat substrate.

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