INVESTIGADORES
MENDEZ DE LEO Lucila Paula
artículos
Título:
Electrochemical Stability of Glyme-based Electrolytes for Li-O 2 Batteries Studied by In Situ Infrared Spectroscopy
Autor/es:
HORWITZ, GABRIELA; CALVO, ERNESTO J.; MÉNDEZ DE LEO, LUCILA PAULA PAULA; DE LA LLAVE, EZEQUIEL
Revista:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Año: 2020 vol. 22 p. 16615 - 16623
ISSN:
1463-9076
Resumen:
In situ subtractively normalized Fourier transform infrared spectroscopy (SNIFTIRS)experiments were performed simultaneously with electrochemical experiments relevant to Li-airbattery operation on gold electrodes in two glyme-based electrolytes: diglyme (DG) and tetraglyme(TEGDME), tested under different operational conditions. Results show that TEGDME isintrinsically unstable and decomposes at potentials between 3.6 - 3.9 V vs Li+/Li even in theabsence of oxygen and lithium ions, while DG shows a better stability, and only decomposes at 4.0V vs Li+/Li in presence of oxygen. The addition of water to the DG based electrolyte exacerbatesits decomposition, probably due to the promotion of singlet oxygen formation.
