Lithium peroxide

Dilithiumperoxid

White solid

Fixed

2.36 g · cm -3

Decomposition from 340 ° C

Exothermic reaction with water

Risk

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Lithium peroxide, Li2O2 is an oxygen compound of alkali metal is lithium.

Production

The presentation is by the reaction of lithium with hydrogen peroxide and then heating with elimination of hydrogen peroxide

Properties

Lithium peroxide is a colorless in its purest form, usually yellowish solid. With water formation takes place by hydrogen peroxide. The compound has a hexagonal crystal structure with space group P63/mmc. The standard enthalpy of lithium peroxide is ΔHf0 = -633 kJ / mol.

Use

Lithium peroxide, may be used to produce high purity lithium oxide. This lithium peroxide is decomposed at 195 ° C, forming lithium oxide and oxygen:

Furthermore, it is used in aerospace for the regeneration of life-sustaining gas supply systems. With carbon dioxide it reacts to form lithium carbonate and oxygen. This causes the air we breathe carbon dioxide is removed and oxygen is released.

Lithium peroxide is used as a hardener for specific polymers.