Electrochemical properties of TіS2 and TiS2/C composite, irradiated by laser and ultrasound

Electrochemical behavior after laser irradiation of TіS2 and its TіS2/С composite with 50% and 80% of NCM (nanoporous carbon material) content in aqueous electrolyte was investigated. It was shown that for TіS2 and its TіS2/С composite the capacitance and Faradaic charge storage mechanisms provide identical contributions to the capacity of corresponding storage devices, while laser irradiation stimulates fast reversible Faradaic reactions that leads to 70% increase of pseudocapacitance contribution into the general capacitance. It was found that preliminary intercalation of fluorine into the electrode material (using thermal exposure method) significantly increases capacity and Coulomb efficiency of storage devices. In particular, their specific energy value becomes almost 5 times greater than corresponding value for the original electrode material.