LiYS2 — Properties & Data | MatWorld

LiYS2

ceramic

· LiYS2

LiYS2 is an inorganic ceramic compound containing lithium, yttrium, and sulfur, belonging to the family of rare-earth sulfide ceramics. This material is primarily investigated in research contexts for solid-state battery applications, particularly as a solid electrolyte or electrode component, where its ionic conductivity and structural stability at operating temperatures are of interest. Compared to conventional liquid electrolytes, sulfide-based ceramics like LiYS2 offer potential advantages in energy density and thermal stability, making them candidates for next-generation lithium-ion and all-solid-state battery technologies.

solid-state batterieslithium-ion battery materialssolid electrolytesenergy storage researchhigh-temperature ionic conductors

Compliance & Regulations

?Conflict Free?RoHS?REACH?TSCA?Prop 65

Units:

si imperial

Property	Value	Unit	Conditions
Bulk Modulus(K)	7,714.6	ksi	DFT · OptB88vdW
Poisson's Ratio(ν)	0.2500	-	DFT · OptB88vdW
Shear Modulus(G)	4,761.6	ksi	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Property	Value	Unit	Conditions	Source
Density(ρ)	0.1189	lb/in³	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Filter by

Method

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	1.970	eV	DFT · OptB88vdW
↳	2.578	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)3 entries	19.87	-	DFT · OptB88vdW
↳	21.16	-	DFT · PBE
↳	12.07 range 6.240–17.90median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	6.455	-	DFT · OptB88vdW
↳	8.154	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Electron Effective Mass(m*e)	0.5433	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	1.553	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.00290	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.00172	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-238.7	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	262.8	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	11.10	%	DFT · TBmBJ

N entriesMultiple entries per property — large groups are collapsed; click a summary row to expand. Use filters above to narrow by form, heat treatment, basis, or test environment.

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Property	Value	Unit	Conditions	Source
Energy Above Hull(ΔEhull)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-2.038	eV/atom	DFT · OptB88vdW

Verified Unverified Low confidence (<80%) Link to source

Reference data from cited sources. Not verified or certified by MatWorld Inc. Verify against the source before use in design. Terms: engineering data

Regulatory Screening

Environmental

RoHS, REACH, and Prop 65 statuses are validated against official substance lists (ECHA SVHC Candidate List, OEHHA Prop 65, RoHS Annex II). Other regulations are estimated from composition and material classification. All screening is a starting point for due diligence — always verify with your supplier before making compliance decisions.

LiYS2

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental