Spaced TiO Nanotube Arrays Allow for High Performance Hierarchical Supercapacitor Structure
arXiv:2004.12845 · doi:10.1039/C6TA10179H
Abstract
In this work we describe the synthesis and electrochemical properties of nitridated hierarchical TiO nanotubes as an electrode for supercapacitors. The hierarchical TiO nanostructures are formed by a controlled layer-by-layer TiO2 nanoparticle decoration on self-organized spaced TiO nanotubes. These structures are then annealed in NH atmosphere at elevated temperature to convert the material to a nitride structure -- this drastically enhances their electron-transport properties. The areal capacitance of hierarchical structures can be tuned by changing the number of decorated TiO nanoparticle layers. The capacitance enhancement of the hierarchical structures reaches a maximum when the surface area through nanoparticle deposition is highest and the conductivity via nitridation is optimized.
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