Сульфид лития

Description

Lithium sulfide Li2S is a binary compound of lithium and sulfur, class: inorganic alkali metal sulfides. Yellow crystalline powder, sensitive to moisture: hydrolyzes on contact with water and humid air, releasing hydrogen sulfide, therefore the product is classified in category 4.3 (emites flammable gases on contact with water). The main consumer is the production of materials for new generation batteries.

Basic Attributes

• CAS No.: 12136-58-2
• Chemical formula: Li2S
• Molecular weight: 45.95
• Exact weight: 46.00410
• EU number: 235-228-1
• DSSTox ID: DTXSID7065251
• PSA: 1
• XLogP3: 0.64820
• Appearance: yellow powder
• Density: 1.66 g/ml at 25 °C (literature data)
• Melting point: 900–975 °C
• Solubility: according to the card, soluble in water and ethanol (accompanied by hydrolysis in water)
• Storage conditions: 2–8 °C

Scope of application

• precursor of sulfide solid electrolytes for solid-state batteries: Li3PS4, Li6PS5Cl, Li10SnP2S12 and related compounds
• cathode material of lithium-sulfur cells - theoretical capacity up to 1166 mAh/g, approximately four times higher than that of lithium cobaltite; its own electronic conductivity is close to that of an insulator, so the cathode is built on a conductive matrix or with conductive additives
• raw materials for the synthesis of lithium hydride, lithium borohydride, lithium amide, lithium thioacetate, lithium tetrafluoroborate
• semiconductor technology: production of thin-film transistors and other elements

Quality requirements

For battery applications, material with a purity of more than 99.9% is taken (battery grade is also produced with a purity of 99.995%). The work is carried out in an environment with a water content of less than 0.1 ppm - otherwise hydrolysis spoils both the sulfide itself and the electrolyte obtained from it.

Safety Information

• Packing level: II
• Hazard category: 4.3
• Transport codes: UN 2923, class 8, packing group II
• WGK Germany: 3
• Hazard class code: 22-31-34
• Safety instructions: 26-36/37/39-45
• RTECS number: OJ6439500
• Tags: C
• Precautions: P280, P301 + P310, P305 + P351 + P338, P310
• Hazard statements: H301, H314
• GHS classification: “Hazard”, H261 (42.03%) - flammable gas is released on contact with water; P231 + P232, P260, P264, P270, P280, P301 + P310, P301 + P330 + P331, P303 + P361 + P353, P304 + P340, P305 + P351 + P338, P310, P321, P330, P363, P370 + P378, P402 + P404, P405, P501
• Reason: Aggregated GHS data from 69 companies for 5 notifications to the ECHA C and L register

Storage and handling

Storage at 2–8 °C in a sealed container, opening and hanging only in a glove box with a dry inert atmosphere. Contact with water and acids is excluded: hydrogen sulfide is released (code 31 in set 22-31-34). H314 - the substance causes severe skin burns and eye damage, gloves, a face shield, and protective clothing are required (instructions 26-36/37/39-45). Do not extinguish with water, collect waste separately (P402 + P404, P501). Class WGK 3 requires complete exclusion of release into water bodies.