|Title||X-ray transparent proton-exchange membrane fuel cell design for in situ wide and small angle scattering tomography|
|Publication Type||Journal Article|
|Year of Publication||2019|
|Authors||Martens, I, Vamvakeros, A, Chattot, R, Blanco, MV, Rasola, M, Pusa, J, Jacques, SDM, Bizzotto, D, Wilkinson, DP, Ruffmann, B, Heidemann, S, Honkimäki, V, Drnec, J|
|Journal||Journal of Power Sources|
We have constructed a 5 cm2 proton exchange membrane hydrogen fuel cell optimized for transparency of high energy X-rays. This cell allows for in situ elastic scattering measurements (WAXS, SAXS) during electrochemical operation with minimal trade-offs in cell performance vs benchtop designs, and is capable of reaching auto- motive current densities. A key feature is that the beam enters the cell at grazing incidence to the electrodes, massively increasing the effective pathlength and therefore the signal-to-background ratio. The 360∘ trans- parency in the plane of the sample permits imaging coupled with advanced techniques, such as X-ray diffraction computed tomography.