Strategic design for promoting water behavior via ensemble of thermo-responsive polymer functionalized catalysts and reservoir carbon in anion exchange membrane fuel cells

Anion-exchange membrane water electrolyzers and fuel cells

“…on making careful modulation of the water content in AEMFCs have been presented. 503–508 The electrode parameters ( e.g. , GDL, ionomer content, catalyst loading amount, and the ratio of active material to carbon) and cell operation conditions ( e.g.…”

“…In addition to the membrane, Yoo and co-workers proposed to manipulate water management from the standpoint of the catalyst material by improving its capability in water transfer via incorporating a thermo-responsive polymer. 505 Specifically, poly-( N -isopropylacrylamide) (PNIPAM), showing the characteristic of hydrophobicity at the operating temperature, was employed to functionalize the electrocatalyst to enhance water management. The normal carbon black was modified with PNIPAM (with the product denoted as C TRP ), and was then used as a support to load Pt to obtain Pt/C TRP .…”

Fluorination and its Effects on Electrocatalysts for Low‐Temperature Fuel Cells

“…Choi et al did functionalize the carbon substrate of their Pt/C nanoparticles catalyst to render it more hydrophobic. [131] The functionalized carbon support was synthesized by reacting Vulcan XC-72R carbon black (which has carboxylic surface functions) with amine-terminated PNIPAM (a thermoresponsive hydrophobic polymer), which was then used to deposit Pt nanoparticles (Pt/C TRP ). The anode CL of their AEMFC was designed from this Pt/C TRP material, additional Vulcan XC72-R carbon (which acts as a water reservoir) and AEM ionomer.…”

Investigation of Gradient Platinum Loading and Porosity Distribution for Anion Exchange Membrane Fuel Cells

“…Although these are promising results, the majority of AEMFCs research is currently focused on the use of commercially affordable AEMs with low resistivity and chemical stability [27]. Despite the relatively high total PGM loading (> 0.6 mg/cm 2 ), often the performance of an AEMFC with commercially affordable AEMs is significantly inferior to that of the PEMFC, in contrast to the previously reported AEMFCs using new AEMs [20,[28][29][30][31][32][33]. The inferior performance of AEMFCs with commercial AEMs might be linked with the water balance, as inappropriate water balance can lead to the membrane drying out.…”