18 May 2017 Effects of ionic liquid to water ratio as a composite medium for the synthesis of LiFePO4 for battery
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LiFePO4 is a highly researched cathode material that serves as an alternative material for traditional commercial lithiumion batteries such as LiCoO2. Currently, there are a number of different methods to synthesize LiFePO4 including: hydrothermal, solid state, spray pyrolysis, and coprecipitation. Our proposed method has the potential to provide an ecologically friendly and economically competitive way to synthesize LiFePO4 by utilizing ionic liquid and water, as a composite synthesis medium. The addition of water to ionic liquid can be beneficial as it can act as a mineralizer to bring insoluble precursors to form LiFePO4 seed crystals. Furthermore, this method provides the possibility of recycling the ionic liquid for repeated synthesis processes. In this work, we study the effects of ionic liquid to water ratio on the crystallinity and morphology of the synthesized material. Our group was able to conclude a reaction medium utilizing a ratio of equal parts of 1-ethyl-3-methyl imidazolium trifluoromethane sulfonate (EMIM Otf) and water, or a slightly favored ionic liquid ratio, increases the efficacy of the synthesis route. Crystallinity and purity was determined by X-ray diffraction (XRD), scanning electron microscopy (SEM) was used to determine morphology and crystal sizes, and energy dispersion spectroscopy (EDX) was used for elemental analysis.
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Rany Tith, Rany Tith, Jaydeep Dutta, Jaydeep Dutta, Kichang Jung, Kichang Jung, Alfredo A. Martinez-Morales, Alfredo A. Martinez-Morales, } "Effects of ionic liquid to water ratio as a composite medium for the synthesis of LiFePO4 for battery", Proc. SPIE 10194, Micro- and Nanotechnology Sensors, Systems, and Applications IX, 101942Y (18 May 2017); doi: 10.1117/12.2268739; https://doi.org/10.1117/12.2268739

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