Na2Si2S5 — Properties & Data | MatWorld

Na2Si2S5

ceramic

· JVASP-23039· Na2Si2S5

Na2Si2S5 is an inorganic ceramic compound belonging to the alkali metal silicate sulfide family, combining sodium, silicon, and sulfur in a crystalline solid matrix. This material is primarily of research and developmental interest for solid-state electrolyte and ion-conducting applications, where its ionic conductivity properties make it a candidate for next-generation battery and energy storage systems. While not yet widely commercialized, materials in this chemical family are investigated for their potential to enable safer, higher-energy-density solid-state batteries as alternatives to conventional liquid electrolytes.

solid-state batteriesionic conductorsenergy storage researchelectrolyte materialsadvanced ceramics developmention-transport applications

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	2.093	kg/m³	DFT · OptB88vdW

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

Filter by

Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	3.519	eV	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.000973	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.000922	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-275.5	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	367.5	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)	0.000	eV/atom	DFT · OptB88vdW
Formation Energy(ΔHf)	-0.9877	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.

Na2Si2S5

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental