Master of Science in Mechanical Engineering (MSME)
In the quest for renewable source of energy, a remarkable step made was in the introduction of the battery system. The lithium ion battery was revolutionary in this regard particularly for its light weight and high energy density. There has been significant progress in the development of this battery system since the present form was introduced in the 1990s. There is currently a global dependence on the use of lithium ion battery in diverse applications such as in the electronics, communications and automobiles. Unfortunately, the energy obtainable from the lithium ion battery continuously falls behind the energy demand. This setback is mostly noticeable in the operating voltage of the battery. The low operating voltage has limited the use of the battery in high voltage applications such as electric vehicles in the automobile industry, payloads and launch vehicles in aerospace applications. Increasing the available discharge voltage per specific energy density is a key research area required to close this application gap. This thesis work contributes to closing this gap by controlling the composition, microstructure, particle size distribution and morphology of spinel lithium manganese oxide cathode materials. The results reported are such that high discharge voltage greater than traditional 4.7 V vs. Li/Li+ is obtainable. Additionally, suggested routes to improving the voltage are enumerated.
Document Availability at the Time of Submission
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Eikhuemelo, Hilary, "Composition Control of Spinel Lithium Manganese Oxide for High Voltage, High Energy Lithium Ion Batteries" (2014). LSU Master's Theses. 2163.