相关实验视频

Updated: Jul 1, 2025

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery

A Protocol for Electrochemical Evaluations and State of Charge Diagnostics of a Symmetric Organic Redox Flow Battery

Published on: February 13, 2017

对于pH中性水性有机氧化还原体流电池的超微透的特雷格基架膜

Junmin Liu¹, Wenyi Wu¹, Peipei Zuo¹

¹Key Laboratory of Precision and Intelligent Chemistry, Department of Applied Chemistry, School of Chemistry and Material Science, University of Science and Technology of China, Hefei 230026, P. R. China.

ACS macro letters

|March 4, 2024

概括

新的聚合物框架膜为高性能离子交换膜 (IEM) 提供了出色的抗膨胀性能. 这些材料提高了选择性和离子导电性,使水性有机氧化还原流电池 (AORFB) 能够稳定运行.

科学领域:

材料科学材料科学材料科学
聚合物化学聚合物化学
电化学电化学电化学

背景情况:

本质微孔性聚合物 (PIM) 对离子交换膜 (IEM) 是有前途的.
在PIM衍生的IEM中,高离子交换能力 (IEC) 会导致严重的胀和选择性降低.
需要先进的IEM,具有改进的抗胀特性和高性能.

研究的目的:

开发具有增强抗胀能力的新型超微孔聚合物框架膜.
为下一代IEM应用提高选择性和离子导电性.
为了证明这些膜在pH中性水性有机氧化还原流电池 (AORFB) 中的有效性.

主要方法:

通过有机sol-gel工艺,使用刚性Trogers Base网络链制造膜.
膜性质的表征,包括膨胀率,离子交换能力 (IEC),尺寸排除选择性和离子导电性.
在pH中性的水性有机氧化还原流电池 (AORFB) 中测试膜的性能.

主要成果:

发育的膜表现出优异的抗膨胀特性,在高IEC2.09mmolg-1时,膨胀比率低于4.5%.
这些膜在抗胀方面优于目前报告的PIM膜.
膜表现出高尺寸排除选择性和竞争性的离子导电性,由于超微孔封闭和充电的孔道.

结论:

超微透的聚合物框架膜为高IEC IEMs的胀问题提供了可行的解决方案.
这些膜使pH中性的水性有机氧化还原流电池 (AORFBs) 能够高效稳定地运行.
聚合物框架材料显示出IEM应用的巨大潜力,并值得在各个领域进一步探索.

更多相关视频

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

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device

Published on: July 20, 2021

相关概念视频

Potentiometry: Membrane Electrodes

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...

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...

Ion Exchange

Ion Exchange

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...