Lithium sulfide is an anti fluorite semiconductor (bandgap 3.865eV). It exists in orthorhombic and cubic structures. The densities of the orthorhombic and cubic structures are 1.75g/cm3 and 1.63g/cm3 respectively.
Lithium sulfide can be widely used as acathode material in Li-S batteries. For example, it can be used as an activematerial to prepare LiS2-C electrode with high reversibility andcycling efficiency and preparation of lithium/polymer electrolyte/LiS2 compositecathode.
Itcan also be used to prepare solid electrolyte interphase (SEI) on Li metalanode. This SEI layer can suppress Li dendrite growth and minimize sidereactions.
5, 10, 50 g in glass bottle
Features and Benefits
- Owing to its high melting point, LiS2 provides a wide operational temperature range to synthesize composite cathode.
- Low density and high specific capacity of LiS2 help to avoid volume expansion during cycling.
- LiS2 has excellent chemical stability against Li and high ionic conductivity (≈10−5 S cm−1).