High-throughput discovery of lithium battery materials
High-throughput discovery of lithium battery materials
This thesis outlines the application of high-throughput methodologies to the discovery of potential lithium battery materials. Arrays of positive electrode materials of varying composition were prepared using automated techniques from ink suspensions and aqueous media. These materials were deposited directly onto an electrode substrate and were tested electrochemically using slow-scan cyclic voltammetry. In addition, the materials were characterised using high-throughput X-ray diffraction and SEM techniques.
A study to determine the validity of the experimental method was undertaken for LiMn4O4, carbon black and PVDF-HFP materials. During the study, the effect of the percolation of electronic conductivity due to the amount of carbon in the materials was investigated by preparing composite electrodes with varying carbon loading and observing the difference in capacity at a given sweep rate.
A new solution synthesis route was developed for lithium iron phosphate (LiFePO4) which was utilised for combinatorial synthesis. The solution route was used to prepare substituted olivines of the type LiMPO4 (where M = Co, Ni, Fe and Mn). These were investigated and evaluated for use as positive electrode materials. An investigation of the effect of sucrose content in the precursor was conducted and the method showed clear differences in performance between materials with high and low residual carbon cement. The effect of zirconium doping in lithium iron phosphates was studied and the screening method showed elevated peak current and capacity values as the carbon loading was increased. However, a corresponding increase in the capacity and current was not observed as the zirconium doping level was increased.
University of Southampton
Spong, Alan Daniel
a88ce849-8170-4f4c-bee8-cb427ada319e
2005
Spong, Alan Daniel
a88ce849-8170-4f4c-bee8-cb427ada319e
Spong, Alan Daniel
(2005)
High-throughput discovery of lithium battery materials.
University of Southampton, Doctoral Thesis.
Record type:
Thesis
(Doctoral)
Abstract
This thesis outlines the application of high-throughput methodologies to the discovery of potential lithium battery materials. Arrays of positive electrode materials of varying composition were prepared using automated techniques from ink suspensions and aqueous media. These materials were deposited directly onto an electrode substrate and were tested electrochemically using slow-scan cyclic voltammetry. In addition, the materials were characterised using high-throughput X-ray diffraction and SEM techniques.
A study to determine the validity of the experimental method was undertaken for LiMn4O4, carbon black and PVDF-HFP materials. During the study, the effect of the percolation of electronic conductivity due to the amount of carbon in the materials was investigated by preparing composite electrodes with varying carbon loading and observing the difference in capacity at a given sweep rate.
A new solution synthesis route was developed for lithium iron phosphate (LiFePO4) which was utilised for combinatorial synthesis. The solution route was used to prepare substituted olivines of the type LiMPO4 (where M = Co, Ni, Fe and Mn). These were investigated and evaluated for use as positive electrode materials. An investigation of the effect of sucrose content in the precursor was conducted and the method showed clear differences in performance between materials with high and low residual carbon cement. The effect of zirconium doping in lithium iron phosphates was studied and the screening method showed elevated peak current and capacity values as the carbon loading was increased. However, a corresponding increase in the capacity and current was not observed as the zirconium doping level was increased.
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Published date: 2005
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Local EPrints ID: 465586
URI: http://eprints.soton.ac.uk/id/eprint/465586
PURE UUID: d4f5c59f-90fa-4791-bdfe-909baf75f8ff
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Date deposited: 05 Jul 2022 01:55
Last modified: 16 Mar 2024 20:16
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Author:
Alan Daniel Spong
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