Cercetări asupra parametrilor electrici ai supercondensatoarelor / Research on the electrical parameters of supercapacitors

Recently, the problem of powering electronic circuits has become an important issue, especially in mobile devices. The use of mainly classical battery storage systems in industry is not a viable solution, as these devices lose their storage capacity after 2-3 years. On the other hand the materials used to manufacture them are harmful to the environment, even banned in some countries, in accordance with European Union regulations such as RoHS 1 and RoHS 2. Recently a promising solution has become known that is in line with these standards, namely the use of supercapacitors as energy storage devices. Supercapacitors are therefore a viable solution for use in an energy storage system. However, since this is a component that is constantly evolving, there is always the question of identifying the best possible operation and performance. This requires numerous tests to be carried out under various operating conditions in order to simulate as closely as possible real settings in which these components could be used. Thus, the thesis contributes to the study of the electrical parameters of supercapacitors by identifying the conduction process of the supercapacitor, by performing investigations on the different materials used in the realization of the device, but also numerous studies to determine the electrical parameters for different supercapacitors available on the market. Thus, as a result of the research conducted, sufficient knowledge was accumulated to realize a supercapacitor. The procedures for realizing and testing the supercapacitor are described in detail in this thesis. Thus, the supercapacitor is a passive electronic device capable of making an important contribution to the industry in terms of energy recovery given the current and future conditions imposed by international regulations on pollution and energy recovery.