V2s3

Compound V2S3 is a binary compound consisting of two atoms of vanadium and three atoms of sulfur. Its chemical formula indicates that it contains two positively charged vanadium ions with a 3+ oxidation state (V3+) and three negatively charged sulfur ions with a 2- oxidation state (S2-). This gives the compound a net charge of zero, as the total positive charge from the vanadium ions exactly balances out the total negative charge from the sulfur ions.

The compound has a molar mass of approximately 222.04 g/mol and a density of 3.4 g/cm³. It is a black or dark grey solid at room temperature and pressure, with a melting point of around 872°C and a boiling point of approximately 1500°C. It is insoluble in water but can be dissolved in various acids, such as hydrochloric acid or nitric acid.

In terms of its crystal structure, V2S3 belongs to the rhombohedral crystal system, specifically the space group R-3m. Its unit cell consists of six formula units arranged in a hexagonal lattice, and the vanadium and sulfur atoms are arranged in layers parallel to the basal plane of the unit cell. The vanadium atoms occupy octahedral sites within the layers, while the sulfur atoms occupy trigonal prismatic sites between the layers.

V2S3 exhibits semiconducting behavior, with electrical conductivity increasing with temperature. It is also a promising material for applications in energy storage and conversion devices, such as lithium-ion batteries and solar cells, due to its high theoretical capacity and good electrochemical performance.