Modelling of temperature dependence on PEO electrolyte with Al2O3

• A Monte Carlo model for ionic transport in polymer electrolyte.
• The temperature dependence of ionic conductivity of PEO-based electrolytes.
• Current densities and number of lithium ions in PEO electrolytes.
• Addition of Al2O3 reduces the apparent activation energy in PEO-based electrolytes.
• The degree of amorphousness of PEO-based electrolytes with Al2O3.

The ionic conductivities and current densities of PEO electrolytes with and without Al2O3 at various temperatures from 300 K to 353.35 K are presented in this work. The conductivity of PEO electrolyte with Al2O3 increases an order from 1.400 × 10−7 S/cm to 1.060 × 10−6 S/cm at ambient temperature by the addition of acidic Al2O3. The numbers of Li+ ions travel through PEO electrolyte are simulated using Monte Carlo method to show the increment of conductivity. The apparent activation energies of PEO electrolytes with Al2O3 are calculated based on Vogel–Tamman–Fulcher (VTF) equation. By using the modified k·p perturbation theory, the degree of amorphousness of PEO electrolytes with Al2O3 increases at high temperature. It demonstrates the presence of the disorder states at high temperature by altering Li+ energies using random numbers in this work.

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