芳香硫化聚胺和化硫酸离子体的比较分析:对聚合物电解质燃料电池性能的影响
Xiao Gao1, Buyi Bian2, Noboru Ohta3
1The School of Chemical and Chemical Engineering, Nanjing University of Science and Technology, Nanjing, Jiangsu 210094, China.
ACS physical chemistry Au
|December 4, 2025
概括
与聚合物电解质燃料电池 (PEFC) 中的Nafion相比,硫化芳香聚乙基 (SPEEK) 离子体表现出明显的界面行为. 斯佩克的意思是说话.
科学领域:
- 材料科学 材料科学 材料科学
- 电化学 电化学 电化学
- 催化剂是一种催化剂.
背景情况:
- 离子体对于聚合物电解质燃料电池 (PEFC) 中的催化剂层性能至关重要.
- 在运行条件下,对硫化芳聚乙基 (SPEEK) 和纳菲昂等离子体的结构性质关系的理解是有限的.
- 催化剂接口上的薄离子体薄膜显著影响燃料电池效率.
研究的目的:
- 系统地分析 (Pt) 基板上的超薄SPEEK和Nafion薄膜的结构性质关系.
- 为了研究这些离子体在不同湿度下的形态学,吸水和质子传输特性.
- 阐明基质相互作用和分子结构在催化剂-离子体界面上的离子体行为上的作用.
主要方法:
- 在现场圆测量用于监测薄膜厚度和胀.
- 草地发生率广角X射线散射 (GIWAXS) 用于结构分析.
- 电化学阻抗光谱 (EIS) 用于确定质子导电性.
主要成果:
- 与Nafion不同,SPEEK膜在Pt接口上呈现出密集的晶体域,这是由于更强的Pt亲和力导致的.
- 与高相对湿度 (RH) 的Nafion相比,SPEEK膜显示出较少的胀和减少的吸水量.
- SPEEK显示出显著的质子导电性异构性 (离平面外低1-2个数量级),而Nafion显示出更少的异构性.
结论:
- SPEEK与Pt的独特接口结构影响其吸水和质子传输特性.
- 在SPEEK中,分子内力量和Pt-氧相互作用有助于其独特的行为.
- 这项研究加深了对PEFCs离子体薄膜中的封闭效应和基质相互作用的理解.
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