In-situ hydrothermal synthesis of three-dimensional MnO2-CNT nanocomposites and their electrochemical properties
Document Type
Article
Publication Date
6-11-2010
Abstract
Three-dimensional (3-D) MnO2-carbon nanotube (CNT) nanocomposites were prepared by a simple one-pot hydrothermal method. An electrode was then prepared with these nanocomposites. For comparative investigation, MnO2 microspheres were also hydrothermally prepared without adding CNTs. The as-synthesized MnO2 microspheres were then mechanically mixed with CNTs to prepare a subsequent electrode. The samples were characterized by electron microscopy, X-ray diffraction, and electrochemical methods. It has been revealed that a 3-D conductive network of CNTs was formed with microspheres of MnO2 nanorods interwoven with and connected by CNTs. As a result, the hydrothermally mixed MnO2-CNT electrode showed a higher specific capacitance than the mechanically mixed electrode. It has therefore been concluded that the hydrothermal mixing method yields a more homogeneous product that is better suited to take full advantages of both the high capacitance of MnO2 and the high electrical conductivity of CNTs. The 3-D MnO2-CNT nanocomposites reported herein have provided a promising electrode material for supercapacitors and other electrochemical energy storage/conversion devices. © 2010 Elsevier B.V. All rights reserved.
Publication Source (Journal or Book title)
Journal of Alloys and Compounds
First Page
259
Last Page
264
Recommended Citation
Teng, F., Santhanagopalan, S., Wang, Y., & Meng, D. (2010). In-situ hydrothermal synthesis of three-dimensional MnO2-CNT nanocomposites and their electrochemical properties. Journal of Alloys and Compounds, 499 (2), 259-264. https://doi.org/10.1016/j.jallcom.2010.03.181
