Abstract
In this paper, we report enhanced electrochemical capacitance of well-aligned TiO2 nanotube arrays with “nanograss” synthesized by electrochemical anodization. The conductivity of hybrid materials is improved by electrochemical reduction method, exhibiting an outstanding specific capacitance of 14.3mFcm−2, which is 14 times larger than pristine ones. The specific capacitance further increases up to 20.5mFcm−2, which is 43.4% higher than reduced ones with selectively retention of “nanograss” by ultrasonic treatment. We expect that the electrochemical-reduction approach and controllable morphology modification offer a potential path for developing high-performance energy storage devices.
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