Electrochemical stability of glyme-based electrolytes for Li-O2 batteries studied by in situ infrared spectroscopy was written by Horwitz, Gabriela;Calvo, Ernesto J.;Mendez De Leo, Lucila P.;de la Llave, Ezequiel. And the article was included in Physical Chemistry Chemical Physics in 2020.SDS of cas: 112-49-2 This article mentions the following:
In situ subtractively normalized Fourier transform IR spectroscopy (SNIFTIRS) experiments were performed simultaneously with electrochem. experiments relevant to Li-air battery operation on gold electrodes in two glyme-based electrolytes: diglyme (DG) and tetraglyme (TEGDME), tested under different operational conditions. The results show that TEGDME is intrinsically unstable and decomposes at potentials between 3.6 and 3.9 V vs. Li+/Li even in the absence of oxygen and lithium ions, while DG shows a better stability, and only decomposes at 4.0 V vs. Li+/Li in the presence of oxygen. The addition of water to the DG based electrolyte exacerbates its decomposition, probably due to the promotion of singlet oxygen formation. In the experiment, the researchers used many compounds, for example, 2,5,8,11-Tetraoxadodecane (cas: 112-49-2SDS of cas: 112-49-2).
2,5,8,11-Tetraoxadodecane (cas: 112-49-2) belongs to ethers. The oxygen atom in ethers are more electronegative than carbon, thus the hydrogens which are alpha to the ethers are more acidic than the simple hydrocarbons. The unique properties of ethers (i.e., that they are strongly polar, with nonbonding electron pairs but no hydroxyl group) enhance the formation and use of many reagents. For example, Grignard reagents cannot form unless an ether is present to share its lone pair of electrons with the magnesium atom. Complexation of the magnesium atom stabilizes the Grignard reagent and helps to keep it in solution.SDS of cas: 112-49-2
Referemce:
Ether – Wikipedia,
Ether | (C2H5)2O – PubChem