Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel

This project aimed to produce highly crystalline lithium iron phosphate coated aerogel (LiFePO4 nanowires) via coating and sintering LiFePO4 on the surface of an aerogel template prepared from cellulose nanofibril (SPCNF) extracted from sago pith waste (SPW). The effects of SPCNF aerogel quantity (X...

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Main Author:	Beh, Jeng Hua
Format:	Thesis
Language:	English
Published:	2017
Subjects:	TP Chemical technology
Online Access:	http://eprints.utm.my/id/eprint/77878/1/BehJengHuaMFChE2017.pdf
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spelling	my-utm-ep.778782018-07-23T05:46:05Z Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel 2017-08 Beh, Jeng Hua TP Chemical technology This project aimed to produce highly crystalline lithium iron phosphate coated aerogel (LiFePO4 nanowires) via coating and sintering LiFePO4 on the surface of an aerogel template prepared from cellulose nanofibril (SPCNF) extracted from sago pith waste (SPW). The effects of SPCNF aerogel quantity (Xq), sintering duration (Xt) and sintering temperature (XT) on the quality of LiFePO4 were studied. Specifically, SPCNF were first extracted from SPW through combined chemical and mechanical treatments, followed by a freeze-drying step to produce an aerogel. The resulting white and spongy SPCNF aerogel was characterized to elucidate its morphology, crystallinity, and thermal resistance using field-emission scanning electron microscopy, powder x-ray diffraction (PXRD) and thermogravimetric analysis, respectively. Results showed that the morphology of SPCNF aerogel resembled that of a web-liked structure with the diameters of each SPCNF measured to be within 15-30 nm. The degree of crystallinity of the aerogel was approximately 88.38% and its thermal degradation temperature was in the range of 260-350 °C. The aerogel was then coated with LiFePO4 through direct coating on aerogel by applying a uniform solution containing Li+, Fe2+ and PO43- in 1:1:1 molar ratio and followed by calcination and sintering. The final product, LiFePO4 nanowires had wire-liked structure with the diameters between 15-30 nm, and the PXRD and transmission electron microscopy verified the nanowires were covered with LiFePO4. Results from design of experiment of full-factorial design showed that the three parameters are significant and the coating quality, Y can be correlated with the following equation: Y = 5.662 + 7.23875Xq + 7.23875Xt + 5.60125XT + 7.23875XqXt + 5.60125XqXT + 5.60125 XtXT + 5.60125 XqXtXT. 2017-08 Thesis http://eprints.utm.my/id/eprint/77878/ http://eprints.utm.my/id/eprint/77878/1/BehJengHuaMFChE2017.pdf application/pdf en public http://dms.library.utm.my:8080/vital/access/manager/Repository/vital:105141 masters Universiti Teknologi Malaysia, Faculty of Chemical Engineering Faculty of Chemical Engineering
institution	Universiti Teknologi Malaysia
collection	UTM Institutional Repository
language	English
topic	TP Chemical technology
spellingShingle	TP Chemical technology Beh, Jeng Hua Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
description	This project aimed to produce highly crystalline lithium iron phosphate coated aerogel (LiFePO4 nanowires) via coating and sintering LiFePO4 on the surface of an aerogel template prepared from cellulose nanofibril (SPCNF) extracted from sago pith waste (SPW). The effects of SPCNF aerogel quantity (Xq), sintering duration (Xt) and sintering temperature (XT) on the quality of LiFePO4 were studied. Specifically, SPCNF were first extracted from SPW through combined chemical and mechanical treatments, followed by a freeze-drying step to produce an aerogel. The resulting white and spongy SPCNF aerogel was characterized to elucidate its morphology, crystallinity, and thermal resistance using field-emission scanning electron microscopy, powder x-ray diffraction (PXRD) and thermogravimetric analysis, respectively. Results showed that the morphology of SPCNF aerogel resembled that of a web-liked structure with the diameters of each SPCNF measured to be within 15-30 nm. The degree of crystallinity of the aerogel was approximately 88.38% and its thermal degradation temperature was in the range of 260-350 °C. The aerogel was then coated with LiFePO4 through direct coating on aerogel by applying a uniform solution containing Li+, Fe2+ and PO43- in 1:1:1 molar ratio and followed by calcination and sintering. The final product, LiFePO4 nanowires had wire-liked structure with the diameters between 15-30 nm, and the PXRD and transmission electron microscopy verified the nanowires were covered with LiFePO4. Results from design of experiment of full-factorial design showed that the three parameters are significant and the coating quality, Y can be correlated with the following equation: Y = 5.662 + 7.23875Xq + 7.23875Xt + 5.60125XT + 7.23875XqXt + 5.60125XqXT + 5.60125 XtXT + 5.60125 XqXtXT.
format	Thesis
qualification_level	Master's degree
author	Beh, Jeng Hua
author_facet	Beh, Jeng Hua
author_sort	Beh, Jeng Hua
title	Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
title_short	Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
title_full	Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
title_fullStr	Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
title_full_unstemmed	Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
title_sort	synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel
granting_institution	Universiti Teknologi Malaysia, Faculty of Chemical Engineering
granting_department	Faculty of Chemical Engineering
publishDate	2017
url	http://eprints.utm.my/id/eprint/77878/1/BehJengHuaMFChE2017.pdf
_version_	1747817853197746176

Synthesis and characterization of lithium iron phosphate nanowires from sago pith waste cellulose nanofibril aerogel

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