Li2Se — Properties & Data | MatWorld

Li2Se

Name: Li2Se
Brand: MatWorld

ceramic

· Li2Se

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.

all-solid-state battery electrolytessolid electrolyte materials researchnext-generation energy storageionic conductor developmentbattery separator alternatives

Compliance & Regulations

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

Units:

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Method

Property	Value	Unit	Conditions
Bulk Modulus(K)2 entries	33.69	GPa	DFT
↳	35.33	GPa	DFT · OptB88vdW
Poisson's Ratio(ν)	0.1900	-	DFT · OptB88vdW
Shear Modulus(G)2 entries	26.60	GPa	DFT
↳	28.04	GPa	DFT · OptB88vdW

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
Density(ρ)	2.907	kg/m³	DFT · OptB88vdW

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Method

Property	Value	Unit	Conditions
Band Gap(Eg)2 entries	3.042	eV	DFT · OptB88vdW
↳	3.871	eV	DFT · TBmBJ
Dielectric Constant (Relative Permittivity)(εr)3 entries	7.801	-	DFT · OptB88vdW
↳	7.840	-	DFT · PBE
↳	6.135 range 4.419–7.851median of 2 measurements	-	DFT · PBEsol
High-Frequency Dielectric Constant (ε∞)(ε∞)2 entries	4.711	-	DFT · OptB88vdW
↳	3.989	-	DFT · TBmBJ
Electronic Dielectric Tensor(ε∞)	Matrix (redacted)	-	DFT · PBE
Total Dielectric Tensor(ε)	Matrix (redacted)	-	DFT · PBE
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Piezoelectric Modulus(eij)	0.000	C/m²	DFT · OptB88vdW
Spectroscopic Limited Maximum Efficiency (SLME)(SLME)	0.1300	%	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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Method

Property	Value	Unit	Conditions
Energy Above Hull(ΔEhull)	0.04370	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)2 entries	-1.356	eV/atom	DFT · OptB88vdW
↳	-1.451	eV/atom	Measured

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.

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.

Li2Se

Mechanical Properties

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental