講演情報
[16p-P09-14]Effect of Stacked Structure of GO and MMT Composite on Proton Pathways in Proton Exchange Membranes
〇(D)Beshoy Thapet Nasr1, Chinnasamy Sengottaiyan1, Gagan Bhatt1, Jeganathan Chellamuthu1, Masanori Hara1, Masamichi Yoshimura1 (1.Toyota Technological Institute)
キーワード：
Proton Exchange Membrane Fuel Cells、Graphene oxide
Fuel cell membranes are crucial for proton conductivity, which directly impacts fuel cell performance. Recent studies have focused on improving proton conductivity and mechanical properties by incorporating fillers like graphene oxide (GO)and montmorillonite (MMT) clay into polymer membranes. These fillers enhance proton conductivity through their unique structures and ability to increase water uptake. However, the alignment and orientation of the membrane's internal structure, a key factor in proton pathway efficiency, have been largely overlooked. This study addresses this gap by investigating how the stacked arrangement of GO and MMT fillers influences proton conductivity.Two types of membrane structure were fabricated using the solution casting technique with identical filler ratios: one employing a layer-by-layer (LBL) assembly method and the other incorporating fillers directly blended into the polymer matrix. Electrochemical impedance spectroscopy revealed that the LBL-assembled membrane exhibited a significantly higher proton conductivity of 0.319 S/m, compared to 0.078 S/m for the blended membrane Fig.1(a,b). This result underscores the critical influence of structural alignment and filler orientation on proton transport efficiency within the membrane. The study introduces a novel approach by demonstrating that controlled, ordered assembly of fillers, as achieved through LBL fabrication, can markedly enhance proton conductivity and overall membrane performance.