| AVS 62nd International Symposium & Exhibition | |
| IPF on Mesoscale Science and Technology of Materials and Metamaterials | Tuesday Sessions |
| Session IPF+MS-TuM |
| Session: | Degradation Science (8:00-10:00) & Electrochemistry from Nano to Meso Scale (11:00-12:20) |
| Presenter: | Henry White, University of Utah |
| Authors: | H. White, University of Utah J. Xiong, University of Utah M. Edwards, University of Utah |
| Correspondent: | Click to Email |
We present finite-element modeling of Li+ transport in solid-state electrolytes, including the role of the double layer electric fields. We developed a 1-D model that describes the mass transport and electric potential, assuming that Li+ is the predominant charge carrier. Mass transport is described by the Nernst-Planck equation and the electric potential is described by Poisson’s equation. These equations were solved in a fully coupled manner, i.e., the electric field affects the mass transport through the electromigration term in the Nernst-Planck equation, while the excess charge due to unequal ion concentrations affects the electric field as the space charge term in Poisson’s equation.
We present calculated potential and concentrations distributions, as well as the contributions of migration and diffusion to the flux of each species. We present investigations of the effect of the solid-state electrolyte thickness on mass transport, varying the thickness from 10 nm to 2000 nm. The current normalized to electrolyte thickness is shown to decreases as the thickness decreases.