基于Aquivion的完全化离子交换膜的合成和性稳定性
Li-Cheng Jheng1, Yu-Hsiang Tsai1, Tai-Hai Huang1
1Department of Chemical and Materials Engineering, National Kaohsiung University of Science and Technology Kaohsiung 80778 Taiwan lcjheng@nkust.edu.tw +886 7 3830674 +886 7 3814526 ext.15148.
RSC advances
|February 16, 2026
概括
新的离子交换膜 (AEMs) 通过使用硫胺结合物来改善性稳定性,用于能应用. 这些增强的AEM在燃料电池和水电解方面显示出有前途的性能.
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
- 聚合物化学 聚合物化学
背景情况:
- 四元化 perfluorinated 聚合物是能器件的有希望的离子交换膜 (AEM),提供良好的维度稳定性和离子导电性.
- 对于这些AEM来说,一个关键的挑战是它们的性稳定性差,这阻碍了它们的广泛应用.
- 现有的AEM经常遭受连接的水解性降解,从而损害了它们在性环境中的长期性能.
研究的目的:
- 合成和评估基于Aquivion的新型化AEMs,具有多种结结构,以增强性稳定性.
- 调查硫基含有链路,基间隔剂和特定循环阴阳基末组对AEM稳定性和性能的影响.
- 探索这些改进的AEM在燃料电池和水电解剂等能设备中的潜力.
主要方法:
- 一系列基于Aquivion的高化AEMs的合成,具有不同的连接结构,包括硫胺链接和稳定的阴离子组 (N-甲基,1,2-二甲基).
- 系统地检查这些结构修改对性稳定性的影响,通过性溶液中浸泡试验.
- 评估氧化物导电性,性处理后的导电性保留,以及在水电解应用中的性能.
主要成果:
- 与硫胺相关的AEMs与六间隔器显示显著增强的性稳定性相比,硫烯和硫酸相关的对应物,防止水解裂变.
- 在Aquivion-SO2NH-6CPip AEM中,在60°C的1M KOH中,在192小时后显示了83.8%的氧化物导电性保留.
- 该Aquivion-SO2NH-6CIm AEM在80°C时实现了高氧导电率2.56 × 10^-2 S cm^-1并表现出极好的水电解性能 (518 mA cm^-2在2.2 V).
结论:
- 硫胺结合和特定的循环阴离子末端组有效地提高了化AEMs的性稳定性.
- 开发的AEM,特别是Aquivion-SO2NH-6CIm和Aquivion-SO2NH-6CPip,显示出在能技术中的应用潜力很大.
- 这些发现为燃料电池和水电解的更耐用和更高效的离子交换膜铺平了道路.
相关概念视频
01:17Ion Exchange
1.3K
Ion exchange chromatography separates charged molecules from a solution by reversibly exchanging them with mobile, or 'active', ions associated with the oppositely charged stationary phase. This method can be used to separate ions, soften and deionize water, and purify solutions. The polymers comprising the ion-exchange column are high-molecular-weight and chemically stable polymers, crosslinked to be porous and essentially insoluble. They are also functionalized with either acidic or...
1.3K
01:16Titration in Nonaqueous Solvents
1.4K
Most acid-base titrations are performed in an aqueous medium. In aqueous titrations, water competes with weaker acids or bases for proton donation or acceptance, leading to ambiguous endpoints in the titration curve. Water also affects the partial ionization of weak acids or bases. For example, water accepts a proton from acetic acid to form hydronium and acetate ions. The hydronium ion formed is a stronger acid than acetic acid, and the acetate ion is a stronger base than water. As a result,...
1.4K
02:45Alkyl Halides
20.2K
Structural Properties
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
Alkyl halides are halogen-substituted alkanes wherein one or more hydrogen atoms of an alkane is replaced by a halogen atom such as fluorine, chlorine, bromine, or iodine. The carbon atom in an alkyl halide is bonded to the halogen atom, which is sp3-hybridized and exhibits a tetrahedral shape.
Unlike alkyl halides, compounds in which a halogen atom is bonded to an sp2 -hybridized carbon atom of a carbon-carbon double bond (C=C) are called vinyl halides. Whereas aryl...
20.2K
01:23Membrane Fluidity
176.3K
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.
176.3K