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Lithium peroxide
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<p>Lithium peroxide is the <a href="/facts/Inorganic_compound/TfFfzxSz">inorganic compound</a> with the <a href="/facts/Chemical_formula/hghUtthl">formula</a> <a href="/facts/Lithium/7vXX6BWA">Li2</a><a href="/facts/Peroxide/VMU8y4xB">O2</a>. Lithium peroxide is a white solid, and unlike most other alkali metal peroxides, it is <a href="/facts/Hygroscopy/1NBGewXv">nonhygroscopic</a>. Because of its high oxygen:mass and oxygen:volume ratios, the solid has been used to remove CO2 from and release O2 to the atmosphere in <a href="/facts/Spacecraft/YQqQaUw0">spacecraft</a>. </p>