Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6601379 | Electrochemistry Communications | 2014 | 5 Pages |
Abstract
Semi-interpenetrating network (semi-IPN) membranes based on sulfonated poly(arylene ether sulfone) (SPAES) were developed for application in polymer electrolyte membrane fuel cells (PEMFCs) operating at high temperature (> 100 °C) and low relative humidity (< 50% RH) conditions. The semi-IPN membranes were prepared by a heating procedure using SPAES solutions containing vinyl phosphonic acid (VPA) and diethylene glycol dimethacrylate (DEGDMA). When the membrane was prepared using the optimized molar ratio of VPA to DEGDMA, it showed a very high proton conductivity of up to 10 mS cmâ 1 at 120 °C and 40% RH, and high mechanical property with a tensile strength of 43.2 MPa. Membrane electrode assemblies (MEAs) prepared using this semi-IPN membrane showed a peak power density of 180 mW cmâ 2 at 120 °C and 40% RH, which is better than that of the MEAs prepared using SPAES membrane (145 mW cmâ 2). The semi-IPN membranes also showed very good electrochemical stability during the durability test.
Keywords
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Kihyun Kim, Pilwon Heo, Taeyun Ko, Jong-Chan Lee,