Metal‐organic chemical vapor deposition of anatase titania on multiwalled carbon nanotubes for electrochemical capacitors

In practice, the capacitance from electrochemical double layer formation on porous carbon-based electrodes is still below preferred values, limiting their use in capacitors. The current drive to innovate ways that generate additional capacitive nature of carbon nanomaterials towards both a high specific energy density (Es) and power (Ps). Herein we report metal-organic chemical vapor deposition (MOCVD) coat multiwalled nanotubes (MWCNTs) with anatase titanium dioxide (TiO2) induce pseudocapacitive charge storage characteristics electrode. study shows MWCNTs were coated bundles, targeted TiO2 loadings successfully attained, though agglomerates also increased wt.%. 10 wt.% TiO2-MWCNT material displayed best behavior associated discharge (Cd), Es, Ps values 907 F kg−1, 55.56 Wh 2.78 W kg−1 at 0.1 A g−1, respectively, due synergistic effect two components composite. Additionally, integral (Cs) 20 was enhanced more than 5000-fold relative 5 composite higher scan speeds 100 200 mV s−1. Electrochemical measurements further demonstrated possible positive tuning (charge/discharge rates, Cd Cs) control. MOCVD synthesis method imparted composites suitable traits showed potential improving physicochemical processes favorable electrical storage.