Journal
JOULE
Volume 4, Issue 11, Pages 2501-2520Publisher
CELL PRESS
DOI: 10.1016/j.joule.2020.09.021
Keywords
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Funding
- Innovate UK [132220]
- EPSRC [EP/M009521/1 DJR00640, EP/L000202, EP/R029431]
- Schlumberger Fellowship
- Darwin College and Thousand Talent Recruitment Programme
- Swedish Research Council
- EPSRC [EP/R029431/1, EP/M009521/1] Funding Source: UKRI
- Innovate UK [132220] Funding Source: UKRI
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The development of moisture-tolerant, LiOH-based non-aqueous LiO2 batteries is a promising route to bypass the inherent limitations caused by the instability of their typical discharge products, LiO2 and Li2O2. The use of the I-/I-3(-) redox couple to mediate the LiOH-based oxygen reduction and oxidation reactions has proven challenging due to the multiple reaction paths induced by the oxidation of I- on cell charging. In this work, we introduce an ionic liquid to a glyme-based electrolyte containing Lil and water and demonstrate a reversible LiOH-based Li-O-2 battery cycling that operates via a 4 e(-)/O-2 process with a low charging overpotential (below 3.5 V versus Li/Li+). The addition of the ionic liquid increases the oxidizing power of I-3(-), shifting the charging mechanism from IO-/IO3- formation to O-2 evolution.
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