Li5FeS4

metal

· JVASP-106930· Li5FeS4

Li5FeS4 is an iron-lithium sulfide compound belonging to the lithium metal sulfide family, relevant to energy storage and solid-state battery research. This material is primarily investigated as a cathode or solid electrolyte component in advanced lithium batteries, where its ionic conductivity and electrochemical stability offer potential advantages over conventional liquid electrolytes and oxide-based solid-state materials. Li5FeS4 represents a promising research direction for next-generation battery systems seeking improved energy density, thermal stability, and safety compared to incumbent technology.

solid-state battery cathodeslithium-ion battery componentssolid electrolyte materialsenergy storage researchelectric vehicle batterieshigh-energy-density applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	0.08006	lb/in³	DFT · OptB88vdW

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

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.4570	eV	DFT · OptB88vdW
High-Frequency Dielectric Constant (ε∞)(ε∞)	32.34	-	DFT · OptB88vdW
Electron Effective Mass(m*e)	1.153	me	DFT · OptB88vdW · 27°C
Hole Effective Mass(m*h)	0.9767	me	DFT · OptB88vdW · 27°C
Magnetic Moment(μB)	4.110	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000393	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000996	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-336.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	267.7	μV/K	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C

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)	0.1825	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-1.112	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

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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.

Li5FeS4 — Properties & Data | MatWorld

Li5FeS4

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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