Sodium superoxide

• Sodium dioxide
• Natriumsuperoxid

Readily decomposable yellow solid

Fixed

2.2 g · cm -3

552 ° C ( decomposition)

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Natriumhyperoxid is a chemical compound having the formula from the group of NaO2 Hyperoxide.

Presentation and occurrence

It is produced during the combustion of sodium at high temperatures and pressures (eg at the onset of meteorites in the Earth's atmosphere ) and is found in some minerals.

Properties

Natriumhyperoxid decomposes on contact with water ( hydrolysis) to sodium hydroxide and oxygen and / or hydrogen peroxide:

It occurs in three crystal structures ( trimorph ): Under -77 ° C in Markasitstruktur (similar FeS2 ), between -77 ° C and -50 ° C in the pyrite structure and above -50 ° C similar to table salt (NaCl).

The standard enthalpy of Natriumhyperoxid is ΔHf0 = -260 kJ / mol.

Future Applications

Natriumhyperoxid is currently the subject of battery research. In the development of modern metal-air battery shows great potential in terms of stability, charge and discharge efficiency.