Lithium selenide (Li₂Se) is an ionic ceramic compound belonging to the antifluorite crystal structure family, composed of lithium and selenium. It is primarily investigated as a solid electrolyte material for next-generation lithium-ion and all-solid-state batteries, where its ionic conductivity and chemical stability are of research interest. Li₂Se remains largely experimental rather than commercially deployed, but represents a promising candidate in the broader class of lithium chalcogenide superionic conductors for high-energy-density energy storage systems.
Compliance & Regulations
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Bulk Modulus(K)2 entries | 33.69 | GPa | — | ||
| ↳ | 35.33 | GPa | — | ||
Poisson's Ratio(ν) | 0.1900 | - | — | ||
Shear Modulus(G)2 entries | 26.60 | GPa | — | ||
| ↳ | 28.04 | GPa | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 2.907 | kg/m³ | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Band Gap(Eg) | 3.252 | eV | — | ||
Dielectric Constant (Relative Permittivity)(εr)3 entries | 7.840 | - | — | ||
| ↳ | 7.801 | - | — | ||
| ↳ | 6.135 range 4.419–7.851median 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) | -195 | µV/K | — |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Energy Above Hull(ΔEhull) | 0.04370 | eV/atom | — | ||
Formation Energy(ΔHf)2 entries | -1.451 | eV/atom | — | ||
| ↳ | -1.356 | eV/atom | — |