Impact of Charger Salt Content in Electrophoretic Deposition on Characteristics of Carbon Nanotubes Composite for Electrochemical Power Sources

Producing composite materials of carbon nanotubes and transition metal oxides is the most promising option for the development of next-generation electrochemical capacitors. Of great interest in this case is the method of electrophoretic deposition. AACVD-CNT and Ni(NO 3 ) 2 •6H 2 O acted as initial components of the CNT/NiO composite, the latter also played the role of carbon nanotube surface charger. Several suspensions with AACVD-CNT, different in charger salt content were prepared. Eight deposition cycles were held with a duration of 0.5 minutes and a break of 5 minutes for drying. The voltage was 30 V, and the distance between the electrodes was 10 mm. Nickel foil was used as a substrate. The final samples of composite electrodes were characterized by cyclic voltammetry to determine the optimal content of Ni(NO 3 ) 2 •6H 2 O in suspension. The best results were demonstrated by a sample obtained from a suspension with the charger salt content of 8 mg per 50 ml.