A Mesothermal Fuel Cell using Diethylmethylammonium Trifluoromethanesulfonate Absorbed Membrane with H3PO4 Addition and Various Amount of Electrolyte Loading in Catalyst Layer

Oxygen Reduction Reaction in Ionic Liquids: Fundamentals and Applications in Energy and Sensors

“…In addition, the permeability of oxygen and hydrogen were almost similar to sulfuric acid solution where increasing the temperature significantly enhances the kinetics of ORR . The addition of acids into ILs is likely to improve the fuel cell performance by enhancing the mass transfer process of H 2 as well as enhancing the ORR rates. ,,, …”

“…134 The addition of acids into ILs is likely to improve the fuel cell performance by enhancing the mass transfer process of H 2 as well as enhancing the ORR rates. 127,129,134,135 Although, it was presumed that H 2 O is the product of O 2 reduction at Pt electrode in [dema][TfO], Walsh et al 136 showed that O 2 reduced to H 2 O via a four electron process that was confirmed via Karl Fischer, rotating disk electrode (RDE) and RRDE voltammetry. Recently, Kiatkittikul et al 137 investigated ORR in a series of fluorohydrogenated ILs and the influence of different ILs cations on ORR parameters on a Pt electrode.…”

“…In contrast to AILs, PILs have active protons and can be used as proton conductor in H 2 /O 2 fuel cells. ,, Many PILs show good thermal stability (up to 150 °C) and high ionic conductivity and can be used in mesothermal nonhumidified fuel cells. ,,− Watanabe and co-workers showed that ORR and hydrogen oxidation reaction (HOR) can take place in PILs prepared by combining organic amines with bis­(trifluoromethylsulfonyl) amide (HNTf 2 ) under anhydrous conditions. ,,, The PILs showed high conductivity and excellent thermal stability (up to 400 °C). Compared to 1-ethyl-3-methylimidazolium bis­(trifluoromethylsulfonyl)­imide ([EMIM]­[NTf 2 ]), an AIL, where no definite increase in current was observed under H 2 atmosphere at a Pt electrode, a significant increase in the current was observed when H 2 was bubbled into PIL.…”

NMR Characterization of Ionicity and Transport Properties for a Series of Diethylmethylamine Based Protic Ionic Liquids

“…Ionic liquids (ILs) have been the subject of considerable interest due to their diverse applications, particularly as solvents and electrolytes for fuel cell and battery materials. − These compounds exhibit unique combinations of properties such as thermal stability well beyond 100 °C, low vapor pressures, high ionic conductivity, and nonflammability, making them ideal for use in fuel cell and battery applications where chemical stability and safety are necessary. , …”

“…In the present work, 1 H NMR and 15 N NMR are used to probe the behavior and ionicity of several DEMA based PILs and to compare the results to conductivity based measurements. DEMA based PILs have been studied extensively with various acids (anions) for their ability to form low melting point compounds while showing promise as anhydrous proton conducting materials above 100 °C. ,,− Acids of varying strength have been chosen to illustrate a range of proton transfer conditions that can be probed experimentally with NMR. These measurements correlate well with calculated proton affinities, providing a useful technique for predicting the proton transfer characteristics of PILs.…”