Li2S is an inorganic ceramic compound consisting of lithium and sulfur, classified as a ceramic material with ionic bonding characteristics. It is primarily investigated as a solid electrolyte and cathode material in next-generation lithium-sulfur batteries, where its high theoretical energy density and ionic conductivity make it attractive for energy storage systems requiring extended range and improved safety compared to conventional liquid electrolytes. Li2S remains largely in the research and development phase for commercial applications, but is notable within the battery materials community for its potential to enable lighter, higher-capacity energy systems for electric vehicles, aerospace, and portable electronics.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 40.08 | GPa | — | ||
| ↳ | 42.23 | GPa | — | ||
Poisson's Ratio(ν) | 0.1800 | - | — | ||
Shear Modulus(G)2 entries | 33.17 | GPa | — | ||
| ↳ | 34.64 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 1.674 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.502 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 7.420 | - | — | ||
| ↳ | 7.466 | - | — | ||
| ↳ | 5.711 range 3.967–7.454median of 2 measurements | - | — | ||
Electronic Dielectric Tensor(ε∞) | Matrix (redacted) | - | — | ||
Total Dielectric Tensor(ε) | Matrix (redacted) | - | — | ||
Magnetic Moment(μB) | 0.000 | µB | — | ||
Piezoelectric Modulus(eij) | 0.000 | C/m² | — | ||
Seebeck Coefficient(S) | -189.9 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.03560 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.544 | eV/atom | — | ||
| ↳ | -1.486 | eV/atom | — |