| 초록 |
Ion-conducting polymer membranes (cation exchange and anion exchange) are a key component in clean energy conversion devices (e.g., fuel cells and water electrolysis) and water purification technology (e.g., desalination). Perfluorinated sulfonic acid polymers such as Nafion are state-of- the-art ion-conducting polymers, but they suffer from high cost, mediocre mechanical strength, and moderate operation temperature. Thus, it is highly desirable to develop readily tunable, high- performance ion-conducting membranes based on low-cost hydrocarbon polymers. Recently, we have developed a novel polymer functionalization method that allows incorporation of a variety of ionic groups to aromatic polymers. Using the method we synthesized highly proton- conductive fuel cell membranes containing sulfonate groups with different acidity strengths (fluoroalkylsulfonic, arylsulfonic, and alkylsulfonic acid groups) and anion-exchange membranes with different quaternized ammonium groups. |
