Supercritical CO2-Mediated Synthesis of CNT@Co3O4 Nanocomposite and Its Application for Energy Storage

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• 作者：Van Hoa Nguyen ; ChanKyu Kang ; Changhyun Roh ; Jae-Jin Shim
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：July 13, 2016
• 年：2016
• 卷：55
• 期：27
• 页码：7338-7343
• 全文大小：432K
• 年卷期：0
• ISSN：1520-5045

文摘

Carbon nanotubes (CNT)/cobalt oxide (Co₃O₄) nanocomposites were synthesized using a facile one-step solvothermal method in supercritical carbon dioxide. The formation of Co₃O₄ nanoparticles on the surface of the CNTs was confirmed by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The analyses revealed the surface of the CNTs to be coated uniformly with Co₃O₄ nanoparticles with a mean size of ca. 5 nm. The electrode-modified CNT/Co₃O₄ composites exhibited a high specific capacitance of 950 F g^–1 at a current density of 1 A g^–1 as well as excellent cycling stability (94.6% capacitance retention after 2000 cycles).