INVESTIGADORES
CALVO Ernesto Julio
artículos
Título:
Electrochemical Stability of Glyme‐based Electrolytes for Li‐O2 Batteries Studied by In Situ Infrared Spectroscopy
Autor/es:
HORWITZ; CALVO EJ,; L.P. MENDEZ DE LEO; DE LALLAVE
Revista:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Lugar: CAMBRIDGE; 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?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.
