The Debye length and anionic transport properties of composite membranes based on supported ionic liquid-like phases (SILLPS)

Abstract

An analysis of the ionic transport properties of BMIM [NTf2] in Supported Ionic-Liquid-Like Phases (SILLPs)-based membranes has been carried out based on experimental measurements of impedance spectroscopy. The direct current...

Harnessing prion-inspired amyloid self-assembly for sustainable and biocompatible proton conductivity

“…The eqn (4) permits us to determine the density of cations (H + or H 3 O + ) (in m −3 ) from the values of the ionic conductivity measured in (S m −1 ), from the frequency domain where the loss tangent reach a maximum in the dielectric spectra of Bode diagram, determining the diffusion coefficient according to the equation. 41–43 where, L is the thickness of the peptide, , being τ m the reciprocal of the relaxation time corresponding to the frequency where tan δ shows a maximum. This relaxation time is associated to the ionic conduction mechanism in the peptides, and the value of the loss tangent at the peak.…”

An intrinsic electrical conductivity study of perovskite powders MAPbX3 (X = I, Br, Cl) to investigate its effect on their photovoltaic performance

“…Besides, the samples were inserted between two gold electrodes attached to the impedance spectrometer working as blocking electrodes. The conductivity of the powders in the cross path was assessed using a Novocontrol broadband dielectric spectrometer (BDS) (Hundsangen, Germany) combined with an SR 830 lock-in amplifier with an Alpha dielectric interface by following the same procedure described earlier, [38][39][40] in the frequency range of 10 À1 o f o 10 7 Hz utilizing a 0.1 V signal amplitude in a range of temperature between 20 and 200 1C in steps of 20 1C. The temperature was kept constant with a stepwise range of 20 1C from 20 to 200 1C controlled by a nitrogen jet (QUATRO from Novocontrol) with a temperature inaccuracy of 0.1 K during every single stretch in frequency.…”

How microstructures, oxide layers, and charge transfer reactions influence double layer capacitances. Part 1: impedance spectroscopy and cyclic voltammetry to estimate electrochemically active surface areas (ECSAs)

“…5 The quality of this approximation can be assessed by the deviations between f r and f À451 as discussed in the literature. 5 (v) The specific capacitance C ˜spec , which is determined by the ratio of C À451 over the surface area A (see eqn (9)). The lowest possible surface area of the polished gold electrode is to identify with the geometric surface of the electrode exposed to the electrolyte, which equals 0.78 cm 2 (see ''Experimental section'').…”

“…The DL plays decisive roles for charge transfer reactions 6,7 and the ion transport at the reaction interface. [8][9][10] Application of the DL-phenomena can be found for instance in sensors 11,12 and supercapacitors. 13,14 Electrochemical impedance spectroscopy (EIS) 15,16 and cyclic voltammetry (CV) 17 are standard methods that probe the current responses of electrodes under sinusoidal and triangular electrode potential variations, respectively.…”

“…The DL plays decisive roles for charge transfer reactions 6,7 and the ion transport at the reaction interface. 8–10 Application of the DL-phenomena can be found for instance in sensors 11,12 and supercapacitors. 13,14…”