With the development of electromobility, the need for environmentally friendly batteries that enable the repeatable storage of large amounts of charge in accessible materials is increasing. Therefore, in this thesis we investigated transition metal chalcogenides, which are a potential electrode material for use in alkaline and multivalent metal-based battery systems due to their 2D structure. Lithium metal cells with a transition metal chalcogenide cathode were prepared by adding carbon black and a 60:30:10 binder ratio and subjected to chronopotentiometric measurement. The electrolyte used was LiTFSI dissolved in a solvent mixture of dimethoxyethane: 1,3-dioxolane=1:1 (vol%). The results were not particularly successful. The main drawback is the significant decrease in specific capacity during the lifetime of the system, which is due to the soluble products formed during the reduction of the chalcogenides. The capacities were also lower than expected. Titanium and zirconium chalcogenides have the greatest potential, as they achieved the highest capacities, while vanadium chalcogenides were best able to maintain the capacity. Due to the poor results, we analysed other organic electrode materials synthesised from different combinations of melamine, tetrahydroxy-1,4-quinone, trikinoyl, 2,3,5,6-tetraaminocyclohex-2,5-diene-1,4-dione and 1,2,4,5-benzentetraamine tetrahydrochloride. We found that those with a quinone functional group in the end structure have the best and most stable capacity.
|
