COMPOSITE MATERIAL FOR SUPERCAPACITORS

The invention relates to a composite material for supercapacitors, as a component of electric power storage sources, in electronics consumer goods and in alternative energy sources, such as electrical machines and on-chip applications. According to the invention, the material comprises an n-type Si support (100) on which a layer of SiOof 500 nm is grown, followed by a nanometric layer of Ni catalyst, obtained by the e-beam evaporation method, recrystallized at the temperature of 750°C for 15 min inside the quartz tube of the chemical vapour deposition equipment (CVD), at a pressure of 760 torr and a Hflow-rate of 500 cm/min, followed by the deposition of a layer of carbon nanotubes (CNT) grown by CVD using CHas a gaseous carbon source, at a flow-rate of 300 cm/min, and, further on, by the deposition of a mixed layer consisting of a conductive polymer and functionalized carbon nanotubes (CNT), which is electrochemically obtained by cyclic voltammetry characterized by 50 consecutive cycles between 0.2...0.85 V/SCE at a scanning rate of 20 mV/s, where, for pyrrole dissolution, 3...5 ml of ethanol are admixed into the electrolyte containing 0.1 M of pyrrole and 0.2 M of HSO, whereto 50 mg of functionalized CNT are also added to finally obtain the composite material having the following physical-chemical characteristics: specific capacity of 55.3 mF/cmand critical force of scratching up to exfoliation of 1050 mN. Invenţia se referă la un material compozit pentru supercapacitori, utilizat în componenţa surselor de stocare a energiei electrice, în produsele electronice de consum şi în sursele alternative de energie, ca, de exemplu, pentru maşini electrice şi aplicaţii on chip. Materialul conform invenţiei este constituit dintr-un suport de Si (100) tip n, peste care se creşte un strat de SiOde 500 nm, apoi un strat nanometric de catalizator de Ni, obţinut prin metoda evaporării cu fascicul de electroni (e-beam), recristalizat la temperatura de 750°C, timp de 15 min, în interiorul tubului de cuarţ al echipamentului de depunere chimică din fază de vapori (CVD), la o presiune de 760 torr, cu un debit de Hde 500 cm/min, apoi se depune un strat de nanotuburi de carbon (CNT) crescute prin CVD, utilizând ca sursă gazoasă de carbon CHcu un debit de 300 cm/min; în continuare se depune un strat mixt, format dintr-un polimer conductor şi nanotuburi de carbon (CNT) funcţionalizate, obţinut electrochimic prin tehnica voltametriei ciclice, caracterizată prin 50 de cicluri cons