dc.contributor.author | Zhao, Leyi | |
dc.date.accessioned | 2016-04-07T18:01:57Z | |
dc.date.available | 2016-04-07T18:01:57Z | |
dc.date.issued | 2016-04-07T18:01:57Z | |
dc.identifier.uri | http://hdl.handle.net/10222/71366 | |
dc.description.abstract | Li-ion battery research is of great technical and industrial importance. Currently, researchers are seeking negative electrode materials that will lead to higher energy density cells. Si-based alloys are promising candidates. However, the commercialization of Si-based alloys as Li-ion battery negative electrodes is hindered by the volume expansion problem of Si during lithiation. In this work, a chemical delithiation method was studied to prepare amorphous silicon (a-Si) from lithium silicide compounds with alcohol. This method was also utilized to synthesize carbon-silicon (C-Si) and iron-silicon (Fe-Si) alloys as negative electrodes for Li-ion batteries. Using powder X-ray diffraction, Mӧssbauer spectroscopy, scanning electron microscopy and electrochemical measurements, the structure and electrochemistry of a-Si, C-Si and Fe-Si alloys were investigated. The as-prepared a-Si, C-Si and Fe-Si electrodes displayed improved electrochemical performance and lower volume expansion compared to that of crystalline Si. | en_US |
dc.language.iso | en | en_US |
dc.subject | Amorphous Silicon | en_US |
dc.subject | Lithium-ion Batteries | en_US |
dc.subject | Negative Electrode Materials | en_US |
dc.title | SILICON-BASED ALLOYS BY CHEMICAL DELITHIATION FOR LITHIUM-ION BATTERIES | en_US |
dc.date.defence | 2016-02-29 | |
dc.contributor.department | Department of Chemistry | en_US |
dc.contributor.degree | Master of Science | en_US |
dc.contributor.external-examiner | n/a | en_US |
dc.contributor.graduate-coordinator | Mark Stradiotto | en_US |
dc.contributor.thesis-reader | Jeff Dahn | en_US |
dc.contributor.thesis-reader | Josef Zwanziger | en_US |
dc.contributor.thesis-supervisor | Mark Obrovac | en_US |
dc.contributor.ethics-approval | Not Applicable | en_US |
dc.contributor.manuscripts | Not Applicable | en_US |
dc.contributor.copyright-release | Not Applicable | en_US |