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dc.contributor.authorZheng, Lituo
dc.date.accessioned2016-02-04T12:45:19Z
dc.date.available2016-02-04T12:45:19Z
dc.identifier.urihttp://hdl.handle.net/10222/70754
dc.description.abstractSodium ion batteries are promising for future use in electrified vehicles and electrical power grids. However, there exist many challenges in the development of negative electrode materials. In this work, room temperature 119Sn Mössbauer spectroscopy and X-ray diffraction were used to study the sodiation mechanism of Sn4P3. The results suggest that upon sodiation, Sn and P begin to react with sodium simultaneously and different Na-Sn phases were formed. These findings are consistent with the behavior of Sn4P3 in Li cells. This study provides an example of how Mössbauer spectroscopy can provide insight into the mechanism of metal alloying reactions in metal ion cells. Five transition metal phosphides (M-P, M=Ti, Mn, Co, Cu, Zn) were synthesized and tested in sodium ion half-cell for use as negative electrode materials. The possibility of using transition metal phosphides as negative electrode was evaluated. Conversion reactions occur during the sodiation/desodiation of the materials. It was found that even though some transition metal phosphides offer high capacities, they all suffer from high irreversible capacity, poor cycling life and high voltage hysteresis. The effects of using different binders and operating temperatures were also explored.en_US
dc.language.isoen_USen_US
dc.subjectSODIUM ION BATTERIESen_US
dc.subjectNEGATIVE ELECTRODESen_US
dc.titlePHOSPHORUS–BASED NEGATIVE ELECTRODES FOR SODIUM-ION BATTERIESen_US
dc.typeThesis
dc.date.defence2016-01-15
dc.contributor.departmentDepartment of Chemistryen_US
dc.contributor.degreeMaster of Scienceen_US
dc.contributor.external-examinern/aen_US
dc.contributor.graduate-coordinatorDr. Mark Stradiottoen_US
dc.contributor.thesis-readerDr. Peng Zhangen_US
dc.contributor.thesis-readerDr. Jeff Dahnen_US
dc.contributor.thesis-supervisorDr. Mark Obrovacen_US
dc.contributor.ethics-approvalNot Applicableen_US
dc.contributor.manuscriptsNot Applicableen_US
dc.contributor.copyright-releaseNot Applicableen_US
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