A mesoscopic model for the effective electrical conductivity of composite polymeric electrolytes
arXiv:1810.11892 · doi:10.1016/j.molliq.2019.02.009
Abstract
The effective quasistatic conductivity of composite polymeric electrolytes is studied in terms of a hard-core--penetrable-layer model. Used to incorporate the interface phenomena (such as amorphization of the polymer matrix around filler particles, stiffening effect by those on the amorphous phase, irregularities of the filler grains' surfaces, etc.), the layers are assumed to be electrically inhomogeneous, consisting of a finite or infinite number of concentric uniform shells. The rules of dominance, imposed on the overlapping regions, are equivalent to the requirement that the local electric properties in the system be determined by the distance from the point of interest to the nearest particle's center. The desired conductivity is calculated using our original many-particle (compact-group) approach which, however, avoids an in-depth elaboration of polarization and correlation processes. The result is expressed through the electrical and geometrical parameters of the constituents. Contrasting it with experiment reveals that the theory adequately describes the effective conductivity as a function of the filler concentration and temperature for a number of polymeric composites based on poly(ethylene oxide) or oxymethylene-linked poly(ethylene oxide) and is more flexible in comparison with other theories.
arXiv comment19 pages, 15 figures, 3 tables, reported at PLMMP-2018 Conference (extended)
References in corpus (5)
- Effective permittivity of mixtures of anisotropic particles
- Conductivity and permittivity of dispersed systems with penetrable particle-host interphase
- Finding the effective structure parameters for suspensions of nano-sized insulating particles from low-frequency impedance measurements
- Effective dielectric response of dispersions of graded particles
- On applicability of differential mixing rules for statistically homogeneous and isotropic dispersions
Cited by in corpus (3)
- Rigorously solvable model for the electrical conductivity of dispersions of hard-core-penetrable-shell particles and its applications
- Effect of the electrical double layer on the electrical conductivity of suspensions
- Determination of zeta-potential of nanofluids based on electrolyte solutions from the measurements by the methods of electrical spectroscopy and laser correlation spectroscopy