Operando invsetigation of water content in PGM-free electrode of fuel cell using Small Angle Neutron Scattering
As an alternative to platinum group metal (PGM) catalyst, our collaborator developed PGM-free catalyst based on Fe-N-C for fuel cell applications. However, the performance of the PGM-free catalyst is sensitive to the water content in the electrode compared to the conventional PGM catalyst. In the proposed study, we will quantify the water content in the PGM-free electrode in an operating fuel cell using small angle neutron scattering (SANS) technique. The hydration state of the proton conducting ionomer will be measured by observing the position of the peak (Q~0.1 and 0.25 A-1), and the liquid water content within the pores of the electrode will be measured by monitoring the incoherent scattering level. This experiment must be performed at a high neutron flux beamline such as the D22 where high detectability of water can be achieved. The outcome of this study will be essential to the development of high performance reliable PGM-free catalyst.
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Jongmin Lee; ESCRIBANO Sylvie; GEBEL Gerard; JACQMIN Laurent; LYONNARD Sandrine; MICOUD Fabrice; MORIN Arnaud; PORCAR Lionel and ROSINI Sebastien. (2018). Operando invsetigation of water content in PGM-free electrode of fuel cell using Small Angle Neutron Scattering. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.1-04-141
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