相关实验视频
Updated: Jul 30, 2026

19:56
Introduction to Solid Supported Membrane Based Electrophysiology
Published on: May 11, 2013
15.2K
在一个呼吸空气的单细胞膜电极组件中的中间水储存的动态管理
Avinash Kumar1, Alex Schechter2, Idit Avrahami1
1Department of Mechanical Engineering and Mechatronics, Ariel University, Ariel 40700, Israel.
Membranes
|January 22, 2024
概括
在呼吸空气的质子交换膜燃料电池 (Air PEM FCs) 中,一个死结的阳极能够实现自我加湿,从而提高了膜电极组件 (MEA) 的性能. 这种策略非常适合需要轻量级,高效的燃料电池的飞应用.
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
- 机械工程 机械工程
背景情况:
- 质子交换膜燃料电池 (PEMFCs) 对膜水化很敏感.
- 在呼吸空气的PEMFC (空气PEM FC) 中的水蒸发可以增加膜电极组件 (MEA) 的电阻.
- 保持最佳的膜水合对于高效的燃料电池运行至关重要.
研究的目的:
- 为了研究一个死胡同的阳极用于空气PEMFC中的自我加湿.
- 开发和验证一个数字模型来预测基于水分的MEA性能.
- 评估该系统在飞应用中的可行性.
主要方法:
- 开发一个动态的数值水平衡模型.
- 使用湿度测量,偏振和电化学阻抗光谱学的实验验证.
- 测试一个轻量级的MEA (12g) 与一个集成的死胡同储存袋.
主要成果:
- 尾阳极有效地储存水以进行自我加湿.
- 经过验证的模型准确地预测了MEA的抗性和性能.
- 薄膜和更厚的气体扩散层增强了膜水化和水的转移.
结论:
- 一个死胡同的阳极为空气PEMFCs提供了一个可行的自我加湿策略.
- 拟议的系统适用于轻量级,便携式燃料电池应用,如直升机.
- 优化MEA配置是最大限度地提高燃料电池效率和寿命的关键.
相关概念视频
The Supercomplexes in the Crista Membrane
The mitochondrial cristae membrane is the primary site for the oxidative phosphorylation (OXPHOS) process of energy conversion mediated through respiratory complexes I to V. These complexes have been widely studied for decades, and it has been proven that they form supramolecular structures called respiratory supercomplexes (SC). These higher-order complexes may be crucial in maintaining the biochemical structure and improving the physiological activity of the individual complexes while...
Mitochondrial Membranes
A single mitochondrion is a bean-shaped organelle enclosed by a double-membrane system. The outer membrane of mitochondria is smooth and contains many porins - the integral membrane transporters. Porins enable free diffusion of ions and small uncharged molecules through the outer mitochondrial membrane but limit the transport of molecules larger than 5000 Daltons. Further, the outer mitochondrial membrane forms a unique structure called membrane contact sites with other subcellular organelles,...
Potentiometry: Membrane Electrodes
Membrane electrodes, also known as p-ion electrodes, use membranes that selectively interact with free analyte ions, generating a potential difference across the membrane. The resulting membrane potential, known as the asymmetry potential, is not zero even when analyte concentrations on both sides of the membrane are equal. The membrane's response is typically not selective to a single analyte but proportional to the concentration of all ions in the sample solution capable of interacting at the...
Microbial 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...

