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Updated: Jul 15, 2025

Protocol of Electrochemical Test and Characterization of Aprotic Li-O2 Battery
Published on: July 12, 2016
The accumulation of Li2CO3 in a Li-O2 battery with dual mediators
Max Jenkins1, Daniel Dewar1, Tammy Nimmo1
1Department of Materials, University of Oxford, Parks Road, Oxford, UK. peter.bruce@materials.ox.ac.uk.
Abstract:
One of the most important challenges facing long cycle life Li-O2 batteries is solvent degradation. Even the most stable ethers, such as CH3O(CH2CH2O)CH3, degrade to form products including Li2CO3, which accumulates in the pores of the gas diffusion electrode on cycling leading to polarisation and capacity fading. In this work, we examine the build-up and distribution of Li2CO3 within the porous gas diffusion electrode during cycling and its link to the cell failure. We also demonstrate that the removal of Li2CO3 by a redox mediator can partially recover the cell performance and extend the cycle life of a Li-O2 battery.
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