関連する実験動画
Updated: Jun 15, 2026
07:55
Ion-Exchange Membranes for the Fabrication of Reverse Electrodialysis Device
Published on: July 20, 2021
調節可能な高性能クロスリンクされたアルカリアニオン交換膜は,燃料電池アプリケーションのためのものです
Nicholas J Robertson1, Henry A Kostalik, Timothy J Clark
1Department of Chemistry and Chemical Biology, Baker Laboratory, Cornell University, Ithaca, New York 14853-1301, USA.
Journal of the American Chemical Society
|February 25, 2010
まとめ
新しく交互に結合したアルカリアニオン交換膜 (AAEM) が,リング開きメタテシスポリメリゼーションを用いて合成されました. これらの膜は,高い酸化水素伝導性と優れた機械的性質を示し,燃料電池技術の進歩を示しています.
科学分野:
- ポリマー化学のポリマー化学について
- 電気化学 電気化学について
- マテリアルサイエンス 材料科学
背景:
- 燃料電池は,有望なエネルギー変換を提供するが,商業的な実用性のために改善されたコンポーネントを必要とします.
- ポリマー電解質膜は,燃料電池の性能に不可欠であり,電極を分離します.
- 陽子伝導膜は確立されているが,水酸化物伝導膜 (アルカリアニオン交換膜,AAEM) はあまり研究されていない.
研究 の 目的:
- アルカリアニオン交換膜 (AAEM) のための新しいクロスリンクされた膜材料を開発する.
- 燃料電池アプリケーションのヒドロキシドイオン伝導性と機械的性質を高めるために.
- 先進的なAAEMの簡単な合成アプローチを探求する.
主な方法:
- 環開きメタテシスポリメリゼーション (ROMP) を利用し,交結ポリマー材料を合成しました.
- 合成された膜のイオン組み込みと伝導性を調査した.
- 結果として生じる交結膜の機械的性質を評価した.
主要な成果:
- ROMPを介して新しいクロスリンクされた膜材料を成功裏に生成しました.
- 開発されたAAEMでは,高ヒドロキシドイオン伝導性を達成しました.
- 燃料電池操作に適した良好な機械的性質が実証されています.
結論:
- クロスリンクはイオンの組み込みを強化し,AAEMで高伝導性をもたらします.
- 簡単な合成アプローチにより,水素と直接メタノール燃料電池の可能性のある材料が得られます.
- 開発されたAAEMは,効率的なアルカリ操作を可能にすることで,燃料電池技術を大幅に進歩させることができます.
関連する概念動画
01:23Microbial 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...
01:17Ion 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 basic...
03:12Batteries 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...
01:15Potentiometry: 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...
01:09Ion-Exchange Chromatography
Ion-exchange chromatography, or IEC, is a technique for separating ions based on their affinity for the stationary phase. The stationary phase is a cross-linked polymer resin with covalently attached ionic functional groups. The functional groups can be either positively charged (cation exchangers) or negatively charged (anion exchangers). A cation exchanger consists of a polymeric anion and active cations, while an anion exchanger is a polymeric cation with active anions. The choice of...
01:15Dialysis
Dialysis is a diffusion-based purification process that separates analyte molecules from a complex matrix. This is accomplished by allowing molecules in the solution to pass through a semipermeable membrane into a liquid on the other side. The membrane is usually made of cellulose acetate or cellulose nitrate, and the second liquid must be miscible with the solution. Ions (e.g., chloride or sodium) or organic molecules (e.g., glucose) can pass through the membrane pores, which generally have...