Ionic Transport in Potential Coating Materials for Mg Batteries

Abstract

A major bottleneck for the development of Mg batteries is the identification of liquid electrolytes that are simultaneously compatible with the Mg-metal anode and high-voltage cathodes. One strategy to widen the stability windows of current nonaqueous electrolytes is to introduce protective coating materials at the electrodes, where coating materials are required to exhibit swift Mg transport. In this work, we use a combination of first-principles calculations and ion-transport theory to evaluate the migration barriers for nearly 27 Mg-containing binary, ternary, and quaternary compounds spanning a wide chemical space. Combining mobility, electronic band gaps, and stability requirements, we identify MgSiN 2 , MgI 2 , MgBr 2 , MgSe, and MgS as potential 1 arXiv:1907.03320v1 [cond-mat.mtrl-sci]

Understanding the nature of the passivation layer enabling reversible calcium plating

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Rationally Designed Vanadium Pentoxide as High Capacity Insertion Material for Mg‐Ion

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