Evaluation of Performance in a Low Humidity Environment Using Ultra-fine Gaps in Carbon Nanotube

다국어 초록 (Multilingual Abstract)

To efficient fuel cell operation, reactants are spread to the catalyst layer in the order of bipolar plates, gas diffusion backing layer (GDBL), and micro porous layer (MPL). When reactants move from GDBL to MPL, the gap is decreased. This narrower gap allows uniform diffusion. In this study, an additional layer is fabricated having gaps smaller than MPL. The advantages are observed that of making reactants more uniformed. This layer is made using carbon nanotube (CNT). Also, this layer will maximize the diffusion of the gap of the 2 nm tube and will help wet of the membrane by hindering the movement of water due to the fine layer. The presence or absence of CNT layers was compared to determine diffusion characteristics, and each experiment was performed with 30, 65, and 100% RH to compare the performance at low humidity in the experiment. The electrochemical performance of various samples were evaluated through polarization curves and electrochemical impedance spectroscopy (EIS) analysis.