Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi

Lithium aluminium titanium phosphate (LATP), Lii+xAIxTi2-x(P0 4 ) 3 (x = 0.0-0.5), lithium based glass ceramics conducting electrolyte with NASICON were successfully prepared by soi gel technique with acetic acid as chelating agent. TGA was carried out to determine the annealing temperature by findi...

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Main Author:	Hamidi, Maziidah
Format:	Thesis
Language:	English
Published:	2014
Subjects:	Geochemistry biogeochemistry
Online Access:	https://ir.uitm.edu.my/id/eprint/14008/1/TM_MAZIIDAH%20HAMIDI%20AS%2014_5.pdf
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spelling	my-uitm-ir.140082022-03-30T05:50:30Z Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi 2014-06 Hamidi, Maziidah Geochemistry biogeochemistry Lithium aluminium titanium phosphate (LATP), Lii+xAIxTi2-x(P0 4 ) 3 (x = 0.0-0.5), lithium based glass ceramics conducting electrolyte with NASICON were successfully prepared by soi gel technique with acetic acid as chelating agent. TGA was carried out to determine the annealing temperature by finding out the precursors’ thermal stability. Lii+xAlxTi2-x(P0 4 ) 3 were annealed at 600°C, 700°C, 800°C and 900'’C for 3 hours in air. XRD revealed major phase of LiTi2(P0 4 )3, which has NASICON structure, exist in all prepared samples with secondary phases TiP2 0 ? and AIPO4. FTIR shows presence of NASICON phosphate peaks from which dominates wavenumber ranged 600 cm’' to 1300 cm’'. Peaks around 1045 cm ', 870 cm"', 740 cm'', and 610 cm'' indicate the presence of NASICON P0 4 ^' in all of the prepared samples. This also confirms the presence of LiTi2(P0 4 ) 3 in all of the samples. The ionic conductivity were analyzed with IS at room temperature and elevated temperature. The highest room temperature conductivity was 2.84 x 10'^ Scm'’ of sample Lii.4Alo4Tii.6(P0 4 )3, (LATP 4), annealed at 800°C for 3 hours in air. The increase in ionic conductivity from LATP 0 annealed at 800°C, 3.12 x 10'^ Scm ' shows that the partial substitution of Al^^ with Ti"*^ was able to increase the ionic conductivity. The high ionic conductivity of LATP 4 was supported by the lower intensity of impurity peaks, as reported in XRD. From ac conductivity analysis using Jonscher’s universal power law, the s values of LATP 4 at various temperatures are within the range 0 < s < 1. It is concluded that the LATP 4 annealed at 800°C followed the quantum mechanical tunneling (QMT) model due to the independency of s to temperature. 2014-06 Thesis https://ir.uitm.edu.my/id/eprint/14008/ https://ir.uitm.edu.my/id/eprint/14008/1/TM_MAZIIDAH%20HAMIDI%20AS%2014_5.pdf text en public mphil masters Universiti Teknologi MARA Faculty of Applied Sciences Tan, Winie (Dr) Yahya, Muhd Zu Azhan (Prof. Dr.)
institution	Universiti Teknologi MARA
collection	UiTM Institutional Repository
language	English
advisor	Tan, Winie (Dr) Yahya, Muhd Zu Azhan (Prof. Dr.)
topic	Geochemistry biogeochemistry
spellingShingle	Geochemistry biogeochemistry Hamidi, Maziidah Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi
description	Lithium aluminium titanium phosphate (LATP), Lii+xAIxTi2-x(P0 4 ) 3 (x = 0.0-0.5), lithium based glass ceramics conducting electrolyte with NASICON were successfully prepared by soi gel technique with acetic acid as chelating agent. TGA was carried out to determine the annealing temperature by finding out the precursors’ thermal stability. Lii+xAlxTi2-x(P0 4 ) 3 were annealed at 600°C, 700°C, 800°C and 900'’C for 3 hours in air. XRD revealed major phase of LiTi2(P0 4 )3, which has NASICON structure, exist in all prepared samples with secondary phases TiP2 0 ? and AIPO4. FTIR shows presence of NASICON phosphate peaks from which dominates wavenumber ranged 600 cm’' to 1300 cm’'. Peaks around 1045 cm ', 870 cm"', 740 cm'', and 610 cm'' indicate the presence of NASICON P0 4 ^' in all of the prepared samples. This also confirms the presence of LiTi2(P0 4 ) 3 in all of the samples. The ionic conductivity were analyzed with IS at room temperature and elevated temperature. The highest room temperature conductivity was 2.84 x 10'^ Scm'’ of sample Lii.4Alo4Tii.6(P0 4 )3, (LATP 4), annealed at 800°C for 3 hours in air. The increase in ionic conductivity from LATP 0 annealed at 800°C, 3.12 x 10'^ Scm ' shows that the partial substitution of Al^^ with Ti"*^ was able to increase the ionic conductivity. The high ionic conductivity of LATP 4 was supported by the lower intensity of impurity peaks, as reported in XRD. From ac conductivity analysis using Jonscher’s universal power law, the s values of LATP 4 at various temperatures are within the range 0 < s < 1. It is concluded that the LATP 4 annealed at 800°C followed the quantum mechanical tunneling (QMT) model due to the independency of s to temperature.
format	Thesis
qualification_name	Master of Philosophy (M.Phil.)
qualification_level	Master's degree
author	Hamidi, Maziidah
author_facet	Hamidi, Maziidah
author_sort	Hamidi, Maziidah
title	Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi
title_short	Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi
title_full	Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi
title_fullStr	Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi
title_full_unstemmed	Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi
title_sort	preparation and characterization of lithium based glass ceramic conducting electrolytes / maziidah hamidi
granting_institution	Universiti Teknologi MARA
granting_department	Faculty of Applied Sciences
publishDate	2014
url	https://ir.uitm.edu.my/id/eprint/14008/1/TM_MAZIIDAH%20HAMIDI%20AS%2014_5.pdf
_version_	1783733193888759808

Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi

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