These are preliminary reports that have not been peer-reviewed. They should not be regarded as conclusive, guide clinical practice/health-related behavior, or be reported in news media as established information. For more information, please see our FAQs.
Preprints are manuscripts made publicly available before they have been submitted for formal peer review and publication. They might contain new research findings or data. Preprints can be a draft or final version of an author's research but must not have been accepted for publication at the time of submission.
submitted on 30.04.2020 and posted on 05.05.2020by Israel Temprano, Tao Liu, Enrico Petrucco, James H. J. Ellison, Gunwoo Kim, Erlendur Jónsson, Clare P. Grey
The development of moisture-tolerant,
LiOH-based non-aqueous Li-O2 batteries is a promising route to bypassing
the inherent limitations caused by the instability of their typical discharge
products, LiO2 and Li2O2. The use of the I-/I3-
redox couple to mediate the LiOH-based oxygen reduction and oxidation reactions
has proven challenging to develop due to the multiple reaction paths induced by
the oxidation of I- on cell charging. In this work we demonstrate a
reversible LiOH-based Li-O2 battery cycling through a 4 e-/O2
process with low charging overpotential (below 3.5 V vs Li/Li+) by
introducing an ionic liquid to a glyme-based electrolyte containing LiI and water.
The addition to the ionic liquid increases the oxidizing power of I3-,
charging mechanism from IO-/IO3- formation to