Stretched Recast Nafion for Direct Methanol Fuel Cells

Impact of Heating on the Structure of Perfluorinated Polymer Electrolyte Membranes: A Positron Annihilation Study

“…This sharp peak can be indexed as the 100 reflection of the hexagonal structure of PTFE-like crystallites. [25][26][27] The crystalline peak is caused by regular intermolecular spacings and the broad peak over a range of 2u ¼ 25-558 consists of several diffraction peaks from intramolecular correlations. [23] The crystalline reflection around 178 and the broad peak are strengthened after heating at 160 8C, suggesting enhanced crystallinity and distinct ordering of the amorphous regions in both Nafion NR212 and Aquivion E8705.…”

Preparation and DMFC performance of a sulfophenylated poly(arylene ether ketone) polymer electrolyte membrane

“…Deuterated dimethylsulfoxide (DMSO-d 6 ) was selected as the solvent and the DMSO signals at 2.50 ppm ( 1 HN M R )a n d 39.51 ppm ( 13 C NMR) were used as the chemical shift references.…”

“…Known for their outstanding chemical, mechanical and oxidative stability and high proton conductivity, perfluorinated sulfonic acid polymers (such as Nafion ® ) exhibit excellent electrochemical performance as polymer electrolyte membranes (PEMs). To date, only a few PEMs have been reported to possess improved single cell performance over commercial Nafion ® -type PEMs [3][4][5][6][7]. As an example, the PEMs based on stretched recast Nafion ® were claimed to have better performance than commercial Nafion ® in DMFCs [6,7].…”

“…To date, only a few PEMs have been reported to possess improved single cell performance over commercial Nafion ® -type PEMs [3][4][5][6][7]. As an example, the PEMs based on stretched recast Nafion ® were claimed to have better performance than commercial Nafion ® in DMFCs [6,7]. Continuing efforts are being made to develop new kinds of hydrocarbonbased membranes as alternatives to Nafion ® because of cost, high fuel crossover, complicated synthetic procedure and environmental uncertainty of Nafion ® membranes [8,9].…”

Electrochemiluminescence of loaded in Nafion Langmuir–Blodgett films: Role of the interfacial ultrathin film

“…Since the first examples, Nafion coated electrodes were applied to a variety of successful electroanalytical applications and constitute the bases for the development of the so-called ion-exchange voltammetry [5][6][7]. Very recently, new interest in Nafion recasted films derives from their use in polymer fuel cells, where it is used in addition to thick Nafion self-standing membranes [8], as component of the catalyst layer [9] and to suppress fuel crossover [10,11].…”