Diffusivity and free anion concentration of ionic liquid composite polybenzimidazole membranes

Abstract

PBI composite membranes containing 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide (BMIM-NTf2) at 1, 5, 10, 20 and 50 wt% have been prepared and the conductivity has been analyzed by electrochemical impedance spectroscopy.

Exploring ion mobility mechanisms in poly indolequinone polymers: a case study on black soldier fly melanin

“…These lengths scales were found to be systematically larger under D 2 O exposure versus H 2 O, with both vapours leading to a decrease with increasing RH. Notably, such a change in the Debye length is again commonly observed in ionic conducting polyelectrolytes when increasing temperature [50]. As above, such a similarity suggests that in melanin the RH has a role equivalent to temperature [22].…”

“…The values for tan δ max are related to the Debye length [50], i.e. the distance of the occurrence of the charge screening effect with respect to the applied electric field…”

Design and Performance Enhancement of Cobalt-Encapsulated Nitrogen-Doped Carbon Nanofiber Electrocatalyst through Ionic Liquid Modification for Efficient Oxygen Reduction

“…The pristine Co@NCNF-700 catalyst shows an initial decrease in weight of around 14% up to ≈400 °C, possibly due to the loss of absorbed gas and water molecules. 69 On the other hand, the initial weight loss for Co@NCNF-700 IL was found to be around 10%, indicating reduced adsorbed moisture content of the catalyst, confirming its hydrophobicity. The presence of [BMIM][NTf 2 ] in the composite catalyst was confirmed by weight change in the temperature range of 300−450 °C.…”

“…As shown in Figure S12, the decomposition of [BMIM]­[NTf 2 ] begins at ≈325 °C, and at 600 °C, it is left with an ash content of 6.5 wt %. The pristine Co@NCNF-700 catalyst shows an initial decrease in weight of around 14% up to ≈400 °C, possibly due to the loss of absorbed gas and water molecules . On the other hand, the initial weight loss for Co@NCNF-700 IL was found to be around 10%, indicating reduced adsorbed moisture content of the catalyst, confirming its hydrophobicity.…”