Toward Reversible and Moisture-Tolerant Aprotic Lithium-Air Batteries
Journal article, 2020

The development of moisture-tolerant, LiOH-based non-aqueous Li-O2 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−/I3− 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 LiI and water and demonstrate a reversible LiOH-based Li-O2 battery cycling that operates via a 4 e−/O2 process with a low charging overpotential (below 3.5 V versus Li/Li+). The addition of the ionic liquid increases the oxidizing power of I3−, shifting the charging mechanism from IO−/IO3− formation to O2 evolution.

lithium hydroxide discharge product

iodide/triiodide redox couple

moisture tolerant

ionic liquids

lithium-air batteries

oxygen evolution reaction

thermodynamic analysis

molecular dynamics

redox mediators


Israel Temprano

University of Cambridge

Tao Liu

University of Cambridge

Enrico Petrucco

Johnson Matthey

James H.J. Ellison

University of Cambridge

Gunwoo Kim

University of Cambridge

Erlendur Jonsson

Chalmers, Physics, Materials Physics

University of Cambridge

C. P. Grey

University of Cambridge


25424351 (eISSN)

Vol. 4 11 2501-2520

Driving Forces

Sustainable development

Subject Categories

Physical Chemistry

Materials Chemistry

Other Chemical Engineering

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