Volume 248, 2024

The accumulation of Li2CO3 in a Li–O2 battery with dual mediators

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.

Graphical abstract: The accumulation of Li2CO3 in a Li–O2 battery with dual mediators

Associated articles

Supplementary files

Article information

Article type
Paper
Submitted
20 5月 2023
Accepted
19 6月 2023
First published
22 6月 2023

Faraday Discuss., 2024,248, 318-326

The accumulation of Li2CO3 in a Li–O2 battery with dual mediators

M. Jenkins, D. Dewar, T. Nimmo, C. Chau, X. Gao and P. G. Bruce, Faraday Discuss., 2024, 248, 318 DOI: 10.1039/D3FD00105A

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