M.S. (Master of Science)
Department of Chemistry and Biochemistry
Zinc metal batteries are considered a promising alternative for grid energy storage due to the low redox potential (-0.76V vs SHE) and high theoretical specific capacity (850mAh/g) of zinc metal anode as well as its compatibility with aqueous electrolytes. They however face issues of poor cathode stability and rapid capacity fading. Several methods have been devised to improve the stability of the cathode materials and develop novel cathode materials with better performance including the metal ion doping of intercalation materials.This study investigated the performance of zinc metal batteries with novel manganese vanadium oxide cathodes. Organic structure directing agents have been used in the synthesis of nanotubes from layered transition metal compounds. In this study, diethanolamine was used as an organic structure directing agent in the synthesis of manganese vanadium oxides and the insertion of manganese ions into the vanadium oxide layers. Hydrothermal synthesis was conducted for 40 hrs at 181°C and the materials were calcined for 2 hrs at 400°C. XRD was conducted to understand the crystal structure of the material. Galvanostatic cycling, and cyclic voltammetry were also conducted to evaluate the electrochemical performance of the materials. In the use of the novel manganese vanadium oxide materials as zinc metal battery cathodes, an improved capacity retention was observed compared to the commonly used MnO2 cathode.
Alabidun, Sarat, "Electrochemical Study of the Performance of Manganese Vanadium Oxide Cathodes in Zinc Batteries" (2021). Graduate Research Theses & Dissertations. 6783.
Northern Illinois University
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