info:eu-repo/semantics/article
Electrochemical stability of glyme-based electrolytes for Li-O2batteries studied by: In situ infrared spectroscopy
Fecha
2020-07Registro en:
Horwitz, Gabriela; Calvo, Ernesto Julio; Méndez de Leo, Lucila Paula; de la Llave, Ezequiel Pablo; Electrochemical stability of glyme-based electrolytes for Li-O2batteries studied by: In situ infrared spectroscopy; Royal Society of Chemistry; Physical Chemistry Chemical Physics; 22; 29; 7-2020; 16615-16623
1463-9076
CONICET Digital
CONICET
Autor
Horwitz, Gabriela
Calvo, Ernesto Julio
Méndez de Leo, Lucila Paula
de la Llave, Ezequiel Pablo
Resumen
In situ subtractively normalized Fourier transform infrared spectroscopy (SNIFTIRS) experiments were performed simultaneously with electrochemical 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.