Abstract
Due to the toxic and flammable problems of organic electrolytes, the study on concentrated aqueous system for lithium-ion batteries (LIBs) has attracted wide attention. In this paper, by molecular dynamics simulations, the CH3COOLi aqueous system is considered as the potential concentrated aqueous system for LIBs, and all the variations of the microstructure of the aqueous system from dilution to concentration are analyzed. The details of microstructure are discussed, especially the interactions concerning anions. Among them, the first peak of RDF (radial distribution function) between the Li[Formula: see text] ion and the oxygen atom in CH3COOLi is 2.9[Formula: see text]Å, which does not change from dilution to concentration. This RDF information further indicates that when the concentration increases, the microstructures of small components formed by any two clusters do not change much, but at the same time, the spatial structures constructed by many small components are gradually built up from a broader perspective.
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