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:	http://ir.uitm.edu.my/id/eprint/14008/ http://ir.uitm.edu.my/id/eprint/14008/1/TM_MAZIIDAH%20HAMIDI%20AS%2014_5.pdf

id	uitm-14008
recordtype	eprints
spelling	uitm-140082016-06-16T04:38:05Z http://ir.uitm.edu.my/id/eprint/14008/ Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi 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 Thesis NonPeerReviewed text en http://ir.uitm.edu.my/id/eprint/14008/1/TM_MAZIIDAH%20HAMIDI%20AS%2014_5.pdf Hamidi, Maziidah (2014) Preparation and characterization of lithium based glass ceramic conducting electrolytes / Maziidah Hamidi. Masters thesis, Universiti Teknologi MARA.
repository_type	Digital Repository
institution_category	Local University
institution	Universiti Teknologi MARA
building	UiTM Institutional Repository
collection	Online Access
language	English
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
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
publishDate	2014
url	http://ir.uitm.edu.my/id/eprint/14008/ http://ir.uitm.edu.my/id/eprint/14008/1/TM_MAZIIDAH%20HAMIDI%20AS%2014_5.pdf
first_indexed	2023-09-18T22:50:40Z
last_indexed	2023-09-18T22:50:40Z
_version_	1777417522315788288

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

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