Synthesis and characterization of Limn(2-x)Fex04 cathodic nano material for advanced lithiumion batteries / Aida Fazliza Mat Fadzi
New lithium transition metal oxides, LiMii(2-X)Fex04 where 0 < x <_0.5 are first synthesized using the sol-gel method. Stoichiometric samples are prepared. Thermogravimetric analysis ( TGA ) are carried out on the precursors to study the thermal properties and decomposition of the samples. The...
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| Format: | Thesis |
| Language: | English |
| Published: |
2007
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| Subjects: | |
| Online Access: | http://ir.uitm.edu.my/id/eprint/545/1/TM_AIDA%20FAZLIZA%20MAT%20FADZIL%20AS%2007_5%201.pdf http://ir.uitm.edu.my/id/eprint/545/ |
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| Summary: | New lithium transition metal oxides, LiMii(2-X)Fex04 where 0 < x <_0.5 are first synthesized using the sol-gel method. Stoichiometric samples are prepared. Thermogravimetric analysis ( TGA ) are carried out on the precursors to study the thermal properties and decomposition of the samples. The precursors are later annealed at 850°C for 24 hours. X-Ray diffractions (XRD) of the samples were taken to examine the crystallinity of the materials and to check the purity of the products. Field Emission Scanning Electron Microscope ( FESEM ) / Energy Dispersive X-Ray Analysis ( EDX ) are carried out to observe the changes in surface morphology and to check the stoichiometry. Cyclic Voltammetry ( CV ) is carried out to determine the characteristics of the electrical potential of the materials. Fabrication of the cathodes and testing of the batteries are later done. The best two materials are then processed to become nano size and were characterized using XRD, FESEM / EDX, particle size analyzer and CV.
Fabrication of the batteries are carried out in an argon filled glove box. Batteries fabricated were then characterized for their electrochemical characteristics using the Multistat Solartron 1480 and the results obtained from both bulk and nano materials were compared. |
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