溶剂对离子交换膜燃料电池的催化剂油墨和层微结构的影响
Chaoqi Han1,2, Wenwen Shi1, Mengxue Huang1,2
1State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan, Shanxi 030001, China.
ACS applied materials & interfaces
|January 17, 2024
概括
墨水中的溶剂成分显著影响离子交换膜燃料电池 (AEMFC) 的催化剂层结构. 富含水的油墨会产生更均的催化剂层,从而提高AEMFC的性能.
科学领域:
- 电化学 电化学 电化学
- 材料科学 材料科学 材料科学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 高性能离子交换膜燃料电池 (AEMFC) 需要优化的催化剂层 (CL) 微结构.
- 溶剂对油墨配方的影响对CL形态和燃料电池性能产生重大影响.
研究的目的:
- 研究二元溶剂系统 (水/异醇) 对油墨和CL微结构的影响.
- 了解溶剂特性如何影响离子体-粒子相互作用和CL形成.
- 为了将CL微观结构与AEMFC性能相关联.
主要方法:
- 用不同的水/IPA比率与离子交换离子体和Pt/C催化剂制造催化剂油墨.
- 墨水和CL微结构的表征 (例如,孔径大小,多孔性,离子体分布).
- 对溶剂特性 (介电常数,可溶性参数) 的分析及其与观察到的微观结构的相关性.
主要成果:
- 富含IPA的油墨会导致CL中大量的Pt/C-离子体聚合物和介质孔.
- 富含水的油墨促进了3D离子体网络,从而产生更小的孔隙,更高的多孔度和同质的CLs.
- 溶剂介电常数和可溶性参数影响粒子相互作用和表面张力,决定CL微观结构.
结论:
- 溶剂工程是控制AEMFC中CL微结构的一个关键策略.
- 墨水中优化的水含量可以改善CL形态,并可能提高AEMFC的性能.
- 这项研究为AEMFC组件的合理设计提供了见解.
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