Exploring the origin of non-dendritic Mg electrodeposition will provide a new prospect of realizing the dendrite-free Li metal anode for next-generation batteries. To fundamentally understand the morphological difference between Li and Mg plating, we hereby developed a multiscale model for a general metal electrodeposition process based on the phase-field method and transition state theory, connecting the atomic level charge-transfer physics to the mesoscale morphological evolution. Through systematical parametric analyses, we discovered that the cation de-solvation-induced exchange current difference between Li and Mg is mainly responsible for their deposition morphological differences. This study provides a strategy of connecting the phase-field method and atomistic calculations and sheds lights on the dendrite-free battery anode design.<br/>

Atomically-informed phase-field modeling of Li and Mg electrodeposition morphologies

2019 Fall National Meeting

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