相关实验视频

Updated: May 8, 2025

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Electrophoretic Crystallization of Ultrathin High-performance Metal-organic Framework Membranes

Published on: August 16, 2018

基于聚乙烯化物为燃料电池的高性能-薄薄芳香碳化合物膜

Tamas Nemeth^1,2, Zongyi Han¹, Lorenz Gubler¹

¹PSI Center for Energy and Environmental Sciences, 5232 Villigen PSI, Switzerland.

|December 27, 2024

概括

研究人员开发了用于燃料电池的新型薄质子交换膜 (PEM),取代了受限制的和多基基物质 (PFAS). 用抗氧化剂对这些基于碳化合物的PEM进行兴奋剂,提高了它们的性能和耐用性.

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:

和多醇基物质 (PFAS) 面临着即将被禁止的禁令,需要替代聚合物电解质燃料电池 (PEFC) 中的质子交换膜 (PEM).
基于碳化合物的材料正在成为下一代PEM的有希望的候选者.
开发持久且高性能的PEM对于推进燃料电池技术至关重要.

研究的目的:

调查新型无PEM的燃料电池性能和耐用性.
为了评估在聚乙烯化物 (PVDF) 基膜上共移植单体的后硫化疗法的有效性.
评估金属胺抗氧化剂对膜老化和燃料电池运行的影响.

主要方法:

将α-甲基烯 (AMS) 和2-甲基氨基烯 (MGN) 单体联合移植到PVDF基膜上.
移植膜的后硫化,以创建PEM结构.
将PEMs置于两个不同的加速应力测试 (AST) 协议:化学AST和高相对湿度AST.
用一种金属化氨酸抗氧化剂对膜进行注.

主要成果:

准备的缺乏的PEM显示了燃料电池的性能和耐用性.
这些膜在模拟 perfluoroalkylsulfonic acid (PFSA) 和芳香碳化合物膜测试的条件下进行了评估.
用金属胺抗氧化剂进行兴奋剂显著降低了膜老化.
抗氧化剂兴奋剂也导致了燃料电池性能的提高.

结论:

在PVDF上由共同移植的AMS和MGN衍生而来的素薄PEM是PFAS的可行的替代品.
开发的膜在各种压力条件下表现出有希望的性能和耐用性.
金属酸抗氧化剂有效地提高了这些下一代PEM的寿命和效率.

关键词:

抗氧化剂抗氧化剂是一种抗氧化剂.芳香的碳化合物是一种芳香的碳化合物.燃料电池是指燃料电池的使用方式.质子交换膜质子交换膜

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

Hydrogen Production and Utilization in a Membrane Reactor

Hydrogen Production and Utilization in a Membrane Reactor

Published on: March 10, 2023

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...

Halogens

Halogens

Group 17 elements, known as halogens, are nonmetals. At room temperature, fluorine and chlorine are gases, bromine is a liquid, and iodine a solid. Astatine is a highly unstable radioactive element, so currently, most of its properties are unknown due to its short half-life. Tennessine is a synthetic element also predicted to be in this group.

Membrane Fluidity

Membrane Fluidity

Cell membranes are composed of phospholipids, proteins, and carbohydrates loosely attached to one another through chemical interactions. Molecules are generally able to move about in the plane of the membrane, giving the membrane its flexible nature called fluidity. Two other features of the membrane contribute to membrane fluidity: the chemical structure of the phospholipids and the presence of cholesterol in the membrane.

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Electrophilic Aromatic Substitution: Fluorination and Iodination of Benzene

Bromination and chlorination of aromatic rings by electrophilic aromatic substitution reactions are easily achieved, but fluorination and iodination are difficult to achieve. Fluorine is so reactive that its reaction with benzene is difficult to control, resulting in poor yields of monofluoroaromatic products. To address this, Selectfluor reagent is used as a fluorine source in which a fluorine atom is bonded to a positively charged nitrogen.