Polyoxometalates as redox mediators for Li-air batteries

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Castle, Jack (2019) Polyoxometalates as redox mediators for Li-air batteries. MSc(Res) thesis, University of Nottingham.

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Abstract

This report will walk through the process of developing polyoxometalates (POMs) to be used as redox mediators in Li – air batteries.Three POMs; (TBA)4[PW11VO40], (TBA)4[PMo11VO¬40] and (TBA)5[PMo10V2O40] were successfully synthesised and electrochemically characterised. With the redox chemistry of the POMs determined, they were implemented into working cells.

Two of the three POMs resulted in an increase in capacity but had little to no effect on the reduction of the overpotential. One POM was taken forward for testing within a pressure cell, with the resulting data providing information regarding electronic efficiency and side reactions within the cell during the discharge process.

It was determined that in order for POMs to be used as redox mediators, some degree of optimisation will be necessary, more specifically, tuning the redox chemistry to potentials more closely associated with Li2O2 oxidation and enhancing the solubility of the compound.

Item Type: Thesis (University of Nottingham only) (MSc(Res))
Supervisors: Newton, Graham
Johnson, Lee
Keywords: polyoxometalates, Lithium-Air batteries, energy storage
Subjects: T Technology > TK Electrical engineering. Electronics Nuclear engineering
T Technology > TP Chemical technology
Faculties/Schools: UK Campuses > Faculty of Science > School of Chemistry
Item ID: 59339
Depositing User: Castle, Jack
Date Deposited: 14 Sep 2023 13:37
Last Modified: 14 Sep 2023 13:37
URI: https://eprints.nottingham.ac.uk/id/eprint/59339

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