Nafion‐115/aromatic poly(etherimide) with isopropylidene groups/imidazole membranes for polymer fuel cells

Abstract

Proton exchange membrane fuel cells (PEMFCs) with Pt/C gas diffusion electrodes and graphite single-serpentine monopolar plates were constructed based on an aromatic poly(etherimide) with isopropylidene groups (PI)/imidazole (Im) and a popular Nafion-115 matrix. The electrochemical properties of PEMFCs were tested at 25 and 608C. The maximum power density of 171 mW/ cm 2 and the maximum current density of 484 mA/cm 2 were detected for Nafion-115/PI membrane. For both constructed PEMFCs the efficiency at 0.6 V was found about 41%. Immersion of Nafion-115 in PI or PI/Im increased the thermal stability and mechanical properties of membranes. Thermal, mechanical properties and morphology of membranes were characterized by TGA, and AFM techniques including force spectroscopy. Interactions between the components in composite membranes were established by FT-IR. V C 2015Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42436.

Nanocomposite proton conducting membranes based on sulfonated polystyrene/imidazole‐2‐acetic acid blend for direct methanol fuel cell application

“…69 Despite the low HNT content, the higher amount of residue mass for the SPSIm/HNT sample could be attributed to the entrapment of some SPS and Im molecules inside the HNT, which would probably result in a mass transport delay that impeded the escape of the SPSIm volatile components. 27,[69][70][71] The cross-section SEM micrographs for all the membranes are presented in Figure 10. The homogenous and dense membrane did not contain any voids or other defects.…”

“…Although no significant changes were observed in the thermal stability of the ternary membrane, the results showed that the onset temperature of SPSIm degradation was slightly lower than that of SPS. In the case of SPSIm/HNT, incorporating HNT could not significantly alter the thermal degradation profile 69 . Despite the low HNT content, the higher amount of residue mass for the SPSIm/HNT sample could be attributed to the entrapment of some SPS and Im molecules inside the HNT, which would probably result in a mass transport delay that impeded the escape of the SPSIm volatile components 27,69–71 …”

Synthetic strategies for highly transparent and colorless polyimide film

“…PI has excellent thermal and chemical stability, insulation, and good mechanical properties 36–41 due to its rigid aromatic construction and imide rings. It has been widely used in fields of electrical, aerospace, microelectronic devices, gas separation technology, polymer electrolyte fuel and so on 42–52 . The first flexible organic electroluminescent display (OELD) with indium tin oxide (ITO) as the anode was prepared on PI film substrate 53,54 …”

“…It has been widely used in fields of electrical, aerospace, microelectronic devices, gas separation technology, polymer electrolyte fuel and so on. [42][43][44][45][46][47][48][49][50][51][52] The first flexible organic electroluminescent display (OELD) with indium tin oxide (ITO) as the anode was prepared on PI film substrate. 53,54 Kapton™ is one of the most successfully commercialized PI films, first synthesized by Sroog 55 in 1965 with pyromellitic dianhydride (PMDA) and 4,4 0 -diaminodiphenyl ether (ODA).…”

Recent development of centrifugal electrospinning

“…Because of their large specific surface area, high porosity, and tunable mechanical properties, nanofibers have broad application in many fields, including bioengineered structures, air and water filtration, electronics, drug delivery, fuel cells, biomedical tissue engineering, building materials, and smart clothing . However, nanofibers produced by traditional methods present some problems, including their toxic solvents and low output.…”