Supercapacitive performance of C-axis preferentially oriented TiO2 nanotube arrays decorated with MnO2 nanoparticles

Abstract

A novel composite supercapacitor electrode material, MnO 2 @ (004) preferred oriented TiO 2 nanotube arrays (p-MTNAs) had been synthesized via anodizing method and hydrothermal deposition. The experimental results showed that the introduction of p-TNAs to MnO 2 could improve the electrochemical properties compared to the MnO 2 @ random crystallography oriented TiO 2 nanotube arrays (r-MTNAs), the reason was that the p-TNAs increased the electric conductivity for faster ion transport. The highest specific capacitance of p-MTNAs electrode could reach 190.6 F/g at the current density of 1 A/g. Moreover, p-MTNAs showed superior cycling stability, remaining 88% of its initial capacitance after 2000 cycles.

Supercapacitive performance of C-axis preferentially oriented TiO2 nanotube arrays decorated with MoO3 nanoparticles

“…[44][45][46] Literature research found that the (004) crystal-oriented TiO 2 NTAs show a higher electron transport rate than that of the polycrystalline TiO 2 NTAs attributed to their regular arrangement of grains along the [001] orientation in the nanotube walls. [47][48][49][50][51] Although a large number of studies reported in the literature have demonstrated that three-dimensional TiO 2 NTAs can be used as good support materials for metal oxides to be applied in supercapacitors, the impact of TiO 2 NTAs with different crystal structure orientations on supercapacitors has been rarely reported. Hence, we fabricated different crystaloriented TiO 2 NTAs decorated with MoO 3 nanoparticles via facile electrochemical deposition on a nanotube surface and studied their application in supercapacitors.…”