First-Principles Dynamics Investigation of Germanium as an Anode Material in Multivalent-Ion Batteries.

ABSTRACT: Germanium, a promising electrode material for high-capacity lithium ion batteries (LIBs) anodes, attracted much attention because of its large capacity and remarkably fast charge/discharge kinetics. Multivalent-ion batteries are of interest as potential alternatives to LIBs because they have a higher energy density and are less prone to safety hazards. In this study, we probed the potential of amorphous Ge anodes for use in multivalent-ion batteries. Although alloying Al and Zn in Ge anodes is thermodynamically unstable, Mg and Ca alloys with Ge form stable compounds, Mg_2.3Ge and Ca_2.4Ge that exhibit higher capacities than those obtained by alloying Li, Na, or K with Ge, corresponding to 1697 and 1771 mA·h·g^-1, respectively. Despite having a slightly lower

SUBMITTER: Kim C 

PROVIDER: S-EPMC10650491 | biostudies-literature | 2023 Oct

REPOSITORIES: biostudies-literature