How to produce lithium sulfide Li2S powder?

Overview of lithium sulfide

Lithium sulfide is an inorganic compound with the molecular formula Li2S. It will crystallize in the form of anti-fluorite, called salt (Li +) 2S2-. It forms a solid yellow-white deliquescent powder. In the air, hydrogen sulfide (the smell of rotten eggs) is easily released. Lithium sulfide is a lithium source that is moderately soluble in water and acid and is used for purposes compatible with sulfate. Sulfate compounds are salts or esters of sulfuric acid formed by replacing one or two hydrogens with metals.

 Hydrogen sulfide can be released by acid. It can react with nitric acid solution, but hydrobromic acid and hydroiodic acid can only be oxidized by oxygen when heated to about 300°C in the air without producing sulfur dioxide. Is to generate lithium sulfate.

 Lithium sulfide is usually slightly harmful to water bodies. Do not expose unsubstituted or large amounts of products to the ground, water courses or sewage systems, and believe that the government does not allow the discharge of materials into the surrounding environment.

How to produce

There are few synthetic methods for lithium sulfide, and the most commonly used synthetic methods are as follows:

The first method is to put sulfur powder into a tetrahydrofuran solution containing lithium triethylborohydride, and after a full reaction, obtain lithium sulfide from the liquid;

In the second method, sulfur powder and metal lithium powder are added to an organic solvent, and after sufficient reaction, the solid powder is separated from the liquid to obtain lithium sulfide (Tao Shengdong, a method for preparing lithium sulfide). The above two methods require the use of toxic and harmful solvents, which are low in efficiency, high in cost, and difficult to industrially produce.

In addition, using lithium sulfate and coke as raw materials, lithium sulfide can also be obtained by a high-temperature firing method at 800 to 900°C.

Lithium sulfide is prepared by treating lithium with sulfur. The reaction is conveniently carried out in anhydrous ammonia.

2 Li + S→Li2S

Superhydride can be used to generate a THF-soluble triethylborane adduct of lithium sulfide.

 Application of lithium sulfide

Lithium sulfide (Li2S) is a product designed specifically for use in high-performance batteries, which can be used as an electrode material or as a precursor for solid electrolytes. As an electrode material, it not only has high capacity, but also overcomes many problems caused by pure sulfur electrodes.

 Lithium sulfide is an anti-fluorite semiconductor (band gap of 3.865eV). It exists in orthorhombic and cubic structures. The densities of the orthorhombic and cubic structures are 1.75g/cm3 and 1.63g/cm3, respectively.

 Lithium sulfide has been studied as a superconductor similar to MgB2. It is also used as a positive electrode material for rechargeable lithium-sulfur batteries.

The price of lithium sulfide

The price of lithium sulfide will vary randomly with the production cost, transportation cost, international situation, and market supply and demand of lithium sulfide. Tanki New Materials Co.,Ltd aims to help all industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full set of customized services. If you are looking for lithium sulfide, please feel free to send an inquiry to get the latest price of lithium sulfide.

Lithium sulfide suppliers

As a global lithium sulfide supplier, Tanki New Materials Co.,Ltd has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (chromium sulfide, zinc sulfide, sulfide Nickel), high-purity targets, functional ceramics and structural devices, and provide OEM services.