Co9S8 — Properties & Data | MatWorld

Co9S8

metal

· JVASP-9095· Co9S8

Co9S8 is a cobalt sulfide compound that forms part of the cobalt-sulfur metal sulfide family, characterized by mixed-valence cobalt cations bonded with sulfide anions. This material is primarily investigated in research contexts for energy storage and catalytic applications, where its layered crystal structure and variable oxidation states make it attractive as an alternative to precious-metal catalysts and as a component in advanced battery systems. Co9S8 is notable for its potential to reduce reliance on platinum-group metals in electrochemical devices while offering tunable electronic properties through doping or nanostructuring.

Electrocatalysis and hydrogen evolutionEnergy storage systemsLithium-ion and beyond-lithium batteriesWater splitting catalystsSupercapacitor electrodesResearch materials for sustainable energy

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Density(ρ)	5.532	kg/m³	DFT · OptB88vdW

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Carrier

Property	Value	Unit	Conditions
Band Gap(Eg)	0.000	eV	DFT · OptB88vdW
Magnetic Moment(μB)	0.000	µB	DFT · OptB88vdW
Thermoelectric Power Factor(PF)2 entries	0.0000756	W/(m·K²)	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	0.0000622	W/(m·K²)	DFT · OptB88vdW · p-type · 1e20 cm⁻³ · 327°C
Seebeck Coefficient(S)2 entries	-9.530	μV/K	DFT · OptB88vdW · n-type · 1e20 cm⁻³ · 327°C
↳	-8.670	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)	-0.5444	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.

Co9S8

Physical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

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