Abstract
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.
| Original language | English |
|---|---|
| Pages (from-to) | 16615-16623 |
| Number of pages | 9 |
| Journal | Physical Chemistry Chemical Physics |
| Volume | 22 |
| Issue number | 29 |
| DOIs | |
| State | Published - 7 Aug 2020 |
| Externally published | Yes |
Bibliographical note
Publisher Copyright:© the Owner Societies.
Funding
LMDL, EdL and EJC are research staff of CONICET. GH acknowledges CONICET for her doctoral fellowship. EdL thanks financial support from Agencia Nacional de Promoción Científica y Tecnológica (ANPCyT) (PICT 2017-2414).
| Funders | Funder number |
|---|---|
| Consejo Nacional de Investigaciones Científicas y Técnicas | |
| Agencia Nacional de Promoción Científica y Tecnológica | PICT 2017-2414 |