The main objective is to gain a comprehensive understanding of transition metal dichalcogenides (TMDs) beyond MoS2 as potential anode materials for sodium-ion batteries (SIBs) through in-situ Raman measurements. The project aims to overcome the limitations of current state-of-the-art anode materials for SIBs, including low specific capacity and poor cycling stability. Therefore, exploring alternative anode materials is fundamental, and focusing on understanding mechanisms related to charge storage and irreversible processes resulting in poor stability is one of the most promising ways to enhance the overall performance of SIBs. The analysis will be applied to TMDs other than MoS2, which are relatively unexplored in the context of SIBs, and it is aimed to characterize novel materials with improved electrochemical performance. Materials will be synthesized mainly by using the solvothermal/hydrothermal synthesis method. Furthermore, the influence of synthesis parameters on the chemical and structural properties of TMDs will be studied. The influence of crystal structure on the overall electrochemical performance of the obtained materials through pyrolysis at different temperatures will be investigated. The second goal of the project is to employ in-situ Raman spectroscopy, allowing for capturing real-time data and gaining insight into the processes involved in energy storage in SIBs. The provided method will enable the direct observation and analysis of charge storage mechanisms, shedding light on the fundamental processes taking place during charging and discharging. Moreover, it will enable the identification of degradation mechanisms and the development of strategies to mitigate performance degradation. Apparatus worth 42 000 PLN will be purchased. Indirect costs (20%), approx. 23 000 PLN.