[1Ea07-12] SU/EN

[1Ea10Y] Operando time-resolved CARS spectroscopy of water distribution and its chemical state inside the proton exchange membranes under transient conditions during power generation

*hiromichi nishiyama¹, junji inukai^1,2,3 (1. Fuel Cell Nanomaterials Center, Univ. of Yamanashi, 2. Clean Energy Research Center, Univ. of Yamanashi, 3. Fuel Cell Institute, National Univ. of Malaysia)

During the operation of a fuel cell vehicle, the power varies from moment to moment. The water distribution inside the proton exchange membrane and its chemical state have a great influence on the performance and durability of fuel cells. Hence, it is essential to develop an operando analysis method to measure the three-dimensional reaction distribution inside the PEM. In this study, we used Coherent Anti-Stokes Raman Scattering (CARS) spectroscopy to measure the distribution of water in the PEM and its chemical state during fuel cell operation with high spatial resolution (10 μmφ (area) × 1 μm (depth)) and temporal resolution (0.5 s).