Use this URL to cite or link to this record in EThOS: https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.759721
Title: A study of tantalum-based perovskites as anode materials for lithium-ion batteries
Author: Alhashmi, Badriya
ISNI:       0000 0004 7431 7502
Awarding Body: University of Warwick
Current Institution: University of Warwick
Date of Award: 2018
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Abstract:
In this thesis, I demonstrate my work on three types of Nano-particle materials, all of the perovskite structure with the intention to study their lithium-ion storage features. Two types of perovskite tantalates; sodium tantalate, NaTaO3, and potassium tantalate, KTaO3 were grown hydrothermally in this work. The third perovskite material; lithium tantalate, LiTaO3 was produced by Sol-gel method. The structure morphology was investigated by scanning electron microscopy SEM and powder X-Ray Diffraction. The electro chemical properties were investigated using both; the cyclic voltammetry (CV), and the charge discharge profile which gave us a better understanding of their abilities of lithium ions. Half -cells were used for the study. Coin cells, as well as two-electrode Swagelok cells, were used. The hydrothermal synthesis has produced a fine powder product of sodium tantalate and potassium tantalate. The solid-state method was used to produce the potassium tantalate material as well. A quality product of lithium tantalate was produced by Sol-gel method. The electrochemical properties were tested. The consistent resultant capacity of the type of material acting as an active material for lithium ion storage is quite interesting. It showed better electrochemical stability than the other two materials; potassium tantalate and sodium tantalate. The electrochemical test shows that there is a relatively high drop in the value of the irreversible capacity after the first cycle for the three materials. More studies must be conducted to give explanations and solutions leading to solid electrochemical findings. Initial test cells were constructed and tested, but solid electrochemical results could not be gathered before the end of the project.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID: uk.bl.ethos.759721  DOI: Not available
Keywords: QC Physics
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