相关实验视频

Updated: Jan 17, 2026

A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells

A Guide to Concentration Alternating Frequency Response Analysis of Fuel Cells

Published on: December 11, 2019

质子交换膜燃料电池在快速启动时大负载变化下的性能降解:基于不同流场的现象和解决方案

Yadong Wang¹, Fengyang Cai¹, Zhengkai Tu¹

¹School of Energy and Power Engineering, Huazhong University of Science and Technology, Wuhan, 430074, China.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)

|September 18, 2025

概括

五通道蛇形流场 (FSFF) 设计在快速启动和负载变化期间提高了质子交换膜燃料电池 (PEMFC) 的耐用性. 与平行流场 (PFF) 相比,FSFF可以更有效地缓解性能恶化.

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
能源转换能源转换

背景情况:

质子交换膜燃料电池 (PEMFC) 对于清洁能源至关重要,但它们在动态操作条件下的耐用性,特别是快速启动和负载变化,仍然是商业化的一个挑战.
流场设计显著影响气体分配,水资源管理以及电池的整体性能和寿命.

研究的目的:

实验性地研究和比较在快速动态负载下使用平行流场 (PFF) 和五通道蛇形流场 (FSFF) 设计的PEMFCs的性能降低和膜电极组件 (MEA) 恶化.
与PFF相比,评估FSFF在减轻性能损失和MEA退化方面的有效性.

主要方法:

采用PFF和FSFF设计的PEMFCs经历了20,000个周期的快速动态负荷,其中2秒的过渡值达到3000mA cm−2.2.
性能退化通过电压损失测量进行评估,而MEA恶化通过电化学阻抗光谱 (EIS) 和催化剂层空间退化分析进行分析.

主要成果:

与PFF设计 (20.77%) 相比,FSFF设计在动态负载下显示了明显较低的电压降解 (9.11%).
FSFF提高了气体分布的均性和水分的去除,从而降低了阴极电荷转移阻力和较少的电化学表面积降解.
空间分析显示,FSFF配置中的催化剂层稀释较少,颗粒聚合减少,特别是在出口区域.

结论:

与平行流场 (PFF) 相比,五通道蛇形流场 (FSFF) 设计在较大的负载变化和快速启动条件下为PEMFC提供了优越的耐用性.
由FSFF提供的有效的天然气分配和水资源管理是缓解性能退化和维护MEA完整性的关键.
流场设计是优化PEMFCs对要求高的应用程序的动态耐用性的关键因素.

关键词:

降解特征降解特征流场设计的流场设计.大量的负载变化.质子交换膜燃料电池的燃料电池是什么快速启动快速启动

更多相关视频

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Author Spotlight: Design and Evaluation of Au-Electroplated Carbon Fiber Cloth Electrodes for Hydrogen Peroxide Fuel Cells

Published on: October 20, 2023

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method

On the Preparation and Testing of Fuel Cell Catalysts Using the Thin Film Rotating Disk Electrode Method

Published on: March 16, 2018

相关概念视频

Batteries and Fuel Cells

Batteries 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...

Fast Decoupled and DC Powerflow

Fast Decoupled and DC Powerflow

The fast decoupled power flow method addresses contingencies in power system operations, such as generator outages or transmission line failures. This method provides quick power flow solutions, essential for real-time system adjustments. Fast decoupled power flow algorithms simplify the Jacobian matrix by neglecting certain elements, leading to two sets of decoupled equations:

The Power Flow Problem and Solution

The Power Flow Problem and Solution

Power flow problem analysis is fundamental for determining real and reactive power flows in network components, such as transmission lines, transformers, and loads. The power system's single-line diagram provides data on the bus, transmission line, and transformer. Each bus k in the system is characterized by four key variables: voltage magnitude Vk, phase angle δk, real power Pk, and reactive power Qk. Two of these four variables are inputs, while the power flow program computes...