Correlation of the average hopping length to the ion conductivity and ion diffusivity obtained from the space charge polarization in solid polymer electrolytes

Abstract

The diffusion constant and other electrical parameters of some LiTFSi salt dissociated PEO based polymer electrolytes has been estimated from the impedance spectroscopy data with reasonable agreement to that obtained from PFG-NMR study.

Tailoring the Structural, Morphological, Electrochemical, and Dielectric Properties of Solid Polymer Electrolyte

“…It may observed from the Table 6 that, hopping frequency (ωh) increase when salt is added in the pure PEO and increases further addition of SN. The high hopping frequency for the PE4 suggests the higher dc conductivity due to lowering of hopping relaxation time (τh) for this system and is in agreement with the impedance study [75]. The increase in the conductivity is also related to increase in the disorder in the polymer chain arrangement after SN addition.…”

“…It rthe eflects that the ion migration in solid polymer electrolyte is the combined effect of the hopping process and segmental motion of polymer chains [71][72][73][74]. To obtain more crucial information the complex conductivity plot is fitted by the equation proposed by Roy et al, [75] which also included the universal Jonscher power law which provides details only of the high frequency region. So, we have fitted the ac conductivity plot in the whole frequency window, shown by solid line in the plot.…”

Effect of salt concentration on dielectric properties of Li-ion conducting blend polymer electrolytes

“…Although, JPL provides sufficient information about the hopping mechanism, it agrees sound only at higher frequencies and fails at lower frequencies due to electrode polarization effect. So, an alternative approach was used to analyze entire frequency window was used in the present investigated system which also includes the contribution from the EP effect and provides us more information which will enhance the understating of the ion dynamics and ion transport phenomena in polymer electrolytes [72]. The effective complex conductivity can be written as * = ( 1 + 1 ) Figure 10 shows the profile of the real part of conductivity and solid red lines are perfect corresponding fits.…”

Visual Sensing of Ag+ Ions through Gelation of Cholesterol‐ Appended Benzimidazole and Associated Ion Conducting Behaviour

“…In the low frequency region, the real conductivity decreases with frequency. This behaviour corresponds to the electrode polarization (EP) effect, which occurs due to accumulation of space charges at the electrolyte‐electrode interface . Above a certain frequency, the conductivity is observed to be frequency independent within the measured frequency range and this is attributed to the macroscopic dc conductivity of the gel.…”

“…This behaviour corresponds to the electrode polarization (EP) effect, which occurs due to accumulation of space charges at the electrolyteelectrode interface. [18] Above a certain frequency, the conductivity is observed to be frequency independent within the measured frequency range and this is attributed to the macroscopic dc conductivity of the gel. The inset of Figure 8 depicts the temperature dependence of the estimated dc conductivity (s dc ) of the gel.…”