研究目的
To measure the transient behavior of the humidi?cation of a Na?on membrane used in a polymer electrolyte fuel cell (PEFC) using coherent anti-Stokes Raman scattering (CARS) spectroscopy.
研究成果
The CARS spectroscopy system successfully measured the transient behavior of the O–H stretching vibration peak of water in the Na?on membrane, revealing a two-step drying process attributed to the formation of a shell-like water layer structure.
研究不足
The study was limited by the sensitivity of the CARS spectroscopy system and the difficulty in completely drying the Na?on membrane with dry nitrogen gas at room temperature.
1：Experimental Design and Method Selection:
A reflection-type microscopic multiplex CARS spectroscopy setup was designed to measure the O–H stretching vibration peak of water in a Na?on membrane.
2：Sample Selection and Data Sources:
A Na?on membrane embedded in a PEFC was used, with measurements taken during dry and wet nitrogen gas flow.
3：List of Experimental Equipment and Materials:
A picosecond Ti-sapphire laser, optical parametric oscillator, photonic crystal fiber, spectrometer, and CCD detector were used.
4：Experimental Procedures and Operational Workflow:
The laser pulses were focused onto the Na?on membrane, and the Anti-Stokes light emitted was collected and analyzed.
5：Data Analysis Methods:
The O–H stretching mode was analyzed using a three-component resonance function to fit the experimental data.
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