Li2 Cu2 S2

semiconductor

· Li2 Cu2 S2

Li₂Cu₂S₂ is an experimental ternary semiconductor compound combining lithium, copper, and sulfur that falls within the broader family of metal sulfides. This material is primarily of research interest for energy storage and optoelectronic applications, where the combination of ionic lithium with copper sulfide chemistry offers potential for enhanced ionic conductivity and electronic properties compared to binary alternatives. While not yet commercialized at scale, compounds in this material family are being investigated for next-generation lithium-ion battery components, solid-state electrolytes, and photovoltaic/photoelectrochemical devices where the layered sulfide structure could enable ion transport and light absorption.

solid-state battery electrolyteslithium-ion battery researchphotovoltaic semiconductorscopper sulfide compositesexperimental energy materialsionic conductor development

Compliance & Regulations

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

Units:

si imperial

Property	Value	Unit	Conditions	Source
Bulk Modulus(K)	69.46	GPa	—
Shear Modulus(G)	13.97	GPa	—

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

Property	Value	Unit	Conditions	Source
Band Gap(Eg)	0.9671	eV	—

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

Property	Value	Unit	Conditions	Source
Formation Energy(ΔHf)	-0.7730	eV/atom	—

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

Regulatory Screening

Environmental

Export Control

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.

Li2 Cu2 S2

Mechanical Properties

Electrical Properties

Other Properties

Regulatory Screening

Environmental

Export Control