Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya

Spinel compounds are being investigated extensively due to their promising properties in replacing the commercially used layered cathode material. This is due to its abundance, less toxic nature and low-cost production. However, spinel compound, LiMn2O4 is unstable and suffer from severe capacity...

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Main Author:	Yahya, Nur Farhana
Format:	Thesis
Language:	English
Published:	2020
Subjects:	Lithium
Online Access:	https://ir.uitm.edu.my/id/eprint/55608/1/55608.pdf
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id	my-uitm-ir.55608
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spelling	my-uitm-ir.556082022-05-19T14:12:32Z Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya 2020-12 Yahya, Nur Farhana Lithium Spinel compounds are being investigated extensively due to their promising properties in replacing the commercially used layered cathode material. This is due to its abundance, less toxic nature and low-cost production. However, spinel compound, LiMn2O4 is unstable and suffer from severe capacity fading. Partial substitution of titanium, Ti, with manganese might overcome this problem. In this work, spinel LiMn2- xTixO4 (x = 0.05, 0.1, 0.2) via a novel self-propagating combustion synthesis and its electrochemical properties are investigated. Simultaneous Thermogravimetric Analysis (STA), X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM were used to characterize all the materials. The characterization of all samples show pure and single-phase spinel cubic structured materials obtained at 700 ̊C and 850 ̊C for 24 h and 48 h annealing duration with a polyhedral like morphology. The EDX results which give the atomic percent for each sample were found to be agreeable to the calculated synthesized values. The effect of the physical characteristics of the cathode material on the electrochemical performances of the battery were elaborated in this study. The material LiMn1.9Ti0.1O4 annealed at 850 ̊C for 24 h and 48 h has the best specific capacity of 112 mAhg-1 in the first cycle, showing potential as good cathode material. 2020-12 Thesis https://ir.uitm.edu.my/id/eprint/55608/ https://ir.uitm.edu.my/id/eprint/55608/1/55608.pdf text en public masters Universiti Teknologi MARA Faculty of Applied Sciences Kamarulzaman,, Norlida (Prof.)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Kamarulzaman,, Norlida (Prof.)
topic	Lithium
spellingShingle	Lithium Yahya, Nur Farhana Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya
description	Spinel compounds are being investigated extensively due to their promising properties in replacing the commercially used layered cathode material. This is due to its abundance, less toxic nature and low-cost production. However, spinel compound, LiMn2O4 is unstable and suffer from severe capacity fading. Partial substitution of titanium, Ti, with manganese might overcome this problem. In this work, spinel LiMn2- xTixO4 (x = 0.05, 0.1, 0.2) via a novel self-propagating combustion synthesis and its electrochemical properties are investigated. Simultaneous Thermogravimetric Analysis (STA), X-Ray Diffraction (XRD) and Field Emission Scanning Electron Microscopy (FESEM were used to characterize all the materials. The characterization of all samples show pure and single-phase spinel cubic structured materials obtained at 700 ̊C and 850 ̊C for 24 h and 48 h annealing duration with a polyhedral like morphology. The EDX results which give the atomic percent for each sample were found to be agreeable to the calculated synthesized values. The effect of the physical characteristics of the cathode material on the electrochemical performances of the battery were elaborated in this study. The material LiMn1.9Ti0.1O4 annealed at 850 ̊C for 24 h and 48 h has the best specific capacity of 112 mAhg-1 in the first cycle, showing potential as good cathode material.
format	Thesis
qualification_level	Master's degree
author	Yahya, Nur Farhana
author_facet	Yahya, Nur Farhana
author_sort	Yahya, Nur Farhana
title	Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya
title_short	Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya
title_full	Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya
title_fullStr	Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya
title_full_unstemmed	Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya
title_sort	physical characteristics and electrochemical performance of nanostructured limn2-xtixo4 cathode material / nur farhana yahya
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Applied Sciences
publishDate	2020
url	https://ir.uitm.edu.my/id/eprint/55608/1/55608.pdf
_version_	1783734918695616512

Physical characteristics and electrochemical performance of nanostructured LiMn2-xTixO4 cathode material / Nur Farhana Yahya

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