Master of Engineering Science
Mechanical and Materials Engineering
Nanomaterials have been studied intensively in the last decades due to their unique physical and chemical properties and their potential for applications in different domains. Among these applications, energy storage has become the center of focus by many research groups and companies to develop high efficiency and reliable energy devices such as the commercial lithium ion batteries (LIBs). However, LIBs has not yet met the growing requirements of the high demand for increasing energy density. More efforts are requested to improve the performance of the batteries by designing better electrode materials and increasing the battery safety. Another type of batteries has emerged such as sodium ion batteries(SIBs) that tends to have bright future for large scale energy applications due to its low cost.
In this thesis, different types of Metal Organic Frameworks (MOFs) including Zeolitic Imidazolate Framework-8 (ZIF-8) and (ZIF-67) and Materials from Institute Lavoisier (MIL-88) are synthesized. Meanwhile, the morphologies and structures of MIL-88 have been optimized and defined through adjusting the hydrothermal process and the effects of different parameters such as process time, and temperature, solvent type, reactant concentration, and additives on the physical and chemical characteristics are also been investigated.
Furthermore, carbon coated cobalt sulfides derived from MOFs is studied for the application of anode in lithium ion batteries (LIBs) and sodium ion batteries (SIBs). This high surface area, high porosity and good electric conductivity material shows high specific capacity results as anode in LIBs and SIBs. Physical and chemical characterization is also conducted to investigate the materials’ properties. The material shows very high structure integrity during the synthesis process.
Other metal sulfides such as are synthesized using MOFs templates and further studied for batteries applications. ZnS exhibited high performance as anode for LIBs and SIBs by delivering high specific capacity and stable cycling performance
Abdulla, Ali, "Metal Sulfides as Anode for Lithium Ion and Sodium Ion Battery" (2017). Electronic Thesis and Dissertation Repository. 5019.