In this work, pure graphene oxide paper and one with the addition of 70 % V2O5 were prepared using the vacuum filtration method. Afterwards, the reduction was carried out using the chronoamperometry method, resulting in prepared rGO and the rGO/V2O5 composite. Structure-properties relationship is of an extreme importance for all applications, therefore this work covers the detailed structural and microstructural characterization of V2O5 and its rGO/V2O5 composite. The thermal stability of the structure and the expansion of the material, as well as the size of the crystallites and all structural changes and transitions into different crystalline phases were investigated. Due to the excellent characteristics of V2O5 and its composites, that have been proven in the previous application of this material in electrochemical devices, in this work, the electrochemical properties of rGO/V2O5 composite were studied using the methods of cyclic voltammetry and chronopotentiometry from the point of view of application in battery systems. In addition to electrochemical energy storage, V2O5 and its composites with reduced graphene oxide are also known for their use in photocatalytic production of hydrogen, and that is why in this work tests of photocatalytic activity with the dyes rhodamine B (RhB) and methylene blue (MB) were carried out. The results showed that the used V2O5 material has very low thermal expansion and nanocrystallites, therefore it is suitable for the preparation of nanocomposites. In this work, rGO/V2O5 composite was successfully prepared, which was confirmed by X-ray diffraction, SEM and EDS, and hot-stage microscopy. The prepared composite is an excellent photocatalyst that decomposed 94.3 % of high-concentration MB dyes (25 ppm) after 120 min. The battery prepared with the tested composite showed high capacities, and detailed tests at different speeds indicated that the reaction speed was controlled by intercalation processes.