INVESTIGADORES
DE LA LLAVE Ezequiel Pablo
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 P.; DE LA LLAVE, EZEQUIEL
Revista:
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Editorial:
ROYAL SOC CHEMISTRY
Referencias:
Año: 2020
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
