CAS number：12136-58-2
molecular formula：Li2S
molecular weight：45.95
EINECS number：235-228-1

English synonyms

dilithiummonosulfide;dilithiumsulfide;lithiumsulfide(li2s);lithiumsulphide,anhydrous;LITHIUM SULFIDE;Lithiumsulfide,98%(99.9%-Li);LITHIUMSULPHIDE;LITHIUM SULFIDE (99.9% LI)

Related categories

Scientific research products or metal materials; organic chemical raw materials; metal chalcogenides; Catalysis and Inorganic Chemistry; Chalcogenides Chemical Synthesis; Lithium; Materials Science; Metal and Ceramic Science

Introduction

Lithium sulfide is an inorganic compound whose chemical formula is Li2S. It belongs to the cubic crystal system and has an inverse fluorite type structure. It is easily deliquescent in the air.

Chemical properties

Lithium sulfide is an inorganic compound whose chemical formula is Li2S. It belongs to the cubic crystal system and has an inverse fluorite type structure. It is easily deliquescent in the air.

Use

●  Lithium sulfide is an inorganic salt compound used as a potential electrolyte material in rechargeable lithium-ion batteries.

Production method

●  Preparation of lithium sulfide: put sulfur powder into a tetrahydrofuran solution containing lithium triethylborohydride, and after sufficient reaction, separate the solid powder from the liquid to obtain it.

●  By direct compounding of simple substances, that is, mixing stoichiometric amounts of lithium and sulfur, heating to melting in a nickel crucible under an inert atmosphere (argon or helium), and then forming a homogeneous melt.
Lithium sulfate can also be reduced with carbon powder.
A mixture of 100g lithium sulfate and 436g carbon powder was taken and heated in an electric furnace to form a homogeneous melt.
This product is easily soluble in water, and forms lithium hydroxide and lithium hydrosulfide in the aqueous solution, which is strongly alkaline:
Li2S+H2OLiOH+LiHS
Hydrochloric acid and lithium sulfide react rapidly when cold to generate hydrogen sulfide and lithium chloride:
Li2S+HClLiCl+2H2S