Non-covalently crosslinked anion exchange membranes: Effect of urea hydrogen-bonding group position

Enhanced Hydroxide Conductivity and Dimensional Stability with Blended Membranes Containing Hyperbranched PAES/Linear PPO as Anion Exchange Membranes

“…As shown in the Arrhenius plots ( Figure 6 b), the achieved activation energy (E a ) of the as-prepared pristine membrane and blending membranes ranged from 8.03 to 12.80 kJ mol g −1 , indicating that the ion transportation mechanism followed the vehicle mechanism [ 30 ]. Moreover, the hydroxide conductivity comparison graph with similar IEC values of the recently reported AEMs is shown in Figure 7 [ 7 , 8 , 12 , 14 , 19 , 30 , 46 , 55 , 56 , 57 ].…”

“…To advance AEMFCs, the development of an anion exchange membrane (AEM) with high ionic conductivity and physicochemical stability is essential [ 8 ]. However, the AEMs that have been studied thus far yield an insufficient electrochemical performance due to the inherently lower mobility of OH − ions compared to H + ions and unstable dimensional stability due to the excessive swelling of the AEM [ 9 , 10 , 11 , 12 ]. Therefore, many researchers have studied AEM with high ion exchange capacity (IEC) value as a method of improving ionic conductivity.…”

Electron-Donating C-NH2 Link Backbone for Highly Alkaline and Mechanical Stable Anion Exchange Membranes

“…Compared with the QA-PE-CO (1.45 mmol g −1 ), the QA-PE-NH 2 AEM with similar IEC absorbs more water at 30 °C, which is owing to the more hydrophilic nature of the C-NH 2 linkages. 31 The hydrogen bond networks could suppress the motion of the polymer chains but maintain relaxation modulus, 32 which devotes to the low swelling ratio of the QA-PE-NH 2 AEMs even at 80 °C (<12.5%), and excellent mechanical properties (tensile strength (TS) > 48.4 MPa, elongation at break (EB) > 50.8%). Compared with QA-PE-CO-1.45, the hydroxide conductivity of QA-PE-NH 2 -1.45 is higher at 30 °C and prominently superior at 80 °C, despite the similar IEC.…”