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Updated: Feb 2, 2026

Preparation of Carbon Nanosheets at Room Temperature
Published on: March 8, 2016
Hollow Carbon Microspheres/MnO2 Nanosheets Composites: Hydrothermal Synthesis and Electrochemical Behaviors
Hui-Li Fan1, Fen Ran2, Xuan-Xuan Zhang1
12School of Materials Science and Engineering, Lanzhou University of Technology, Lanzhou, 730050 People's Republic of China.
Abstract:
This article reported the electrochemical behaviors of a novel hollow carbon microspheres/manganese dioxide nanosheets (micro-HC/nano-MnO2) composite prepared by an in situ self-limiting deposition method under hydrothermal condition. The results of scanning electron microscopy reveal that MnO2 nanosheets homogeneously grow onto the surface of micro-HC to form a loose-packed microstructure. The quantity of MnO2 required in the electrode layer has thereby been reduced significantly, and higher specific capacitances have been achieved. The micro-HC/nano-MnO2 electrode presents a high capacitance of 239.0 F g-1 at a current density of 5 mA cm-2, which is a strong promise for high-rate electrochemical capacitive energy storage applications.
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