相关实验视频
Updated: Jul 16, 2026
11:05
A Gradient-generating Microfluidic Device for Cell Biology
Published on: August 30, 2007
15.5K
通过构建带有梯度微观结构的气体扩散层来提高燃料电池性能
Rui-Xin Wang1, Bai-He Chen1, Ye-Fan-Hao Wang1
1Shanghai Engineering Research Center of Hierarchical Nanomaterials, Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai 200237, China.
Materials (Basel, Switzerland)
|July 30, 2025
概括
一种新的梯度孔气体扩散层 (GDL) 通过优化水和气体运输来提高质子交换膜燃料电池 (PEMFC) 的性能. 这种设计将峰值功率密度提高20%,解决高电流密度的挑战.
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
- 化学工程是化学工程的重要组成部分.
背景情况:
- 质子交换膜燃料电池 (PEMFC) 面临性能限制,原因是水淹没和质量转移问题,特别是在高电流密度.
- 在气体扩散层 (GDL) 中有效的水和气体管理对于最佳的PEMFC运行至关重要.
研究的目的:
- 设计和制造用于PEMFCs的多尺度梯度孔气体扩散层 (GDL).
- 为了研究梯度孔结构对水泛滥和质量转移限制的影响.
- 在高电流密度条件下提高PEMFC的整体性能和功率密度.
主要方法:
- 使用自组装模具制造具有受控梯度孔分布 (80-170微米) 的GDL.
- 在高电流密度条件下,用渐变孔GDL对PEMFC进行实验测试.
- 在优化的GDL结构中,分析气液运输路径的机制.
主要成果:
- 梯度孔GDL实现了1.18W·cm-2的峰值功率密度,比传统结构提高了20%.
- 优化的结构促进了通过特定道的集中水运输.
- 观察到由度梯度驱动的有效气体扩散和运输,优化了气液管理.
结论:
- 多尺度梯度孔GDL有效地解决了PEMFC中的水泛滥和质量转移限制.
- 这种创新的GDL设计提高了燃料电池性能和功率密度.
- 这些发现通过提高运营稳定性和效率,为PEMFC技术的商业化提供了重大进展.
相关概念视频
03:12Batteries and Fuel Cells
A battery is a galvanic cell that is used as a source of electrical power for specific applications. Modern batteries exist in a multitude of forms to accommodate various applications, from tiny button batteries such as those that power wristwatches to the very large batteries used to supply backup energy to municipal power grids. Some batteries are designed for single-use applications and cannot be recharged (primary cells), while others are based on conveniently reversible cell reactions that...
01:23Microbial Fuel Cells
Microbial fuel cells (MFCs) are bioelectrochemical devices that generate electricity by exploiting the metabolic processes of electrogenic bacteria. These systems provide a renewable energy source and serve as an innovative method for treating organic waste, such as wastewater.A typical MFC consists of two chambers: an anoxic (oxygen-free) compartment that houses the bacteria and an oxic (oxygen-rich) compartment that contains oxygen as the terminal electron acceptor. Many MFCs use proton...