Print Email Facebook Twitter Sulphur-based spinel material as a cathode for Magnesium-ion battery Title Sulphur-based spinel material as a cathode for Magnesium-ion battery Author Pochareddy, Yashwanth Kutti (TU Delft Electrical Engineering, Mathematics and Computer Science) Contributor Kelder, Erik (mentor) Wagemaker, Marnix (graduation committee) Brück, Ekkes (graduation committee) Vasileiadis, Alexandros (mentor) Degree granting institution Delft University of Technology Date 2019-06-25 Abstract Li-ion batteries have major disadvantages. One of which is the growth of dendrites (in case Li metal based batteries), a major safety issue. In addition to that, Li-ion batteries also use elements such as Co, and Li, which are regionally scarce. Mg-ion batteries are one of the alternatives for Li-ion batteries. However, the electrolyte and cathode materials for Mg-ion batteries, are still in developmental stages.In this study, the use of a sulphur-based spinel (also known as thiospinel) material as a cathode is explored. After literature review, MgMn2S4 and MgTi2S4 were identified as suitable cathode materials. Following which, the MgMn2S4 spinel is doped with Ti in the place of Mn at different doping ratios and the resulting combinations are evaluated for their stability, average intercalation voltage, volume change, spinel inversion and migration barriers. Two combinations MgMnTiS4 and MgMn0.75Ti1.25S4 are found to be stable with respect to the end members i.e. MgMn2S4 and MgTi2S4. Average voltages of 1.702 and 1.527 V (vs. Mg/Mg2+) are observed for MgMnTiS4 and MgMn0.75Ti1.25S4. However, spinel inversion is observed in MgMnTiS4. A volume change of 21.2, and 20% is observed in MgMnTiS4 and MgMn0.75Ti1.25S4, respectively. Subject Magnesium-ion batteryCathodeSulphur spinelAverage intercalation voltageDensity Functional Theory To reference this document use: http://resolver.tudelft.nl/uuid:fdbef536-7f68-4df7-8d2c-d10bce95e239 Embargo date 2020-06-25 Part of collection Student theses Document type master thesis Rights © 2019 Yashwanth Kutti Pochareddy Files PDF Thesis_Yashwanth_Kutti_Po ... areddy.pdf 2.51 MB Close viewer /islandora/object/uuid:fdbef536-7f68-4df7-8d2c-d10bce95e239/datastream/OBJ/view