Highly Ordered Mesoporous Cobalt Oxide Nanostructures: Synthesis,Characterisation, Magnetic Properties,and Applications for Electrochemical Energy Devices |
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| Authors: | Prof Dr Guoxiu Wang Hao Liu Prof Josip Horvat Bei Wang Prof Dr Shizhang Qiao Jinsoo Park Prof Dr Hyojun Ahn |
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| Institution: | 1. Department of Chemistry and Forensic Science, University of Technology Sydney, Sydney, NSW 2007 (Australia), Fax: (+61)?295141460;2. School of Mechanical, Materials and Mechatronic Engineering and Institute for Superconducting and Electronic Materials, University of Wollongong, Wollongong, NSW 2522 (Australia);3. ARC Centre of Excellence for Functional Nanomaterials, Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, QLD 4072 (Australia);4. School of Materials Science and Engineering, Gyeongsang National University, 900 Gazwa‐dong, Jinju, Gyeongnam 660‐701 (Korea) |
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| Abstract: | Highly ordered mesoporous Co3O4 nanostructures were prepared using KIT‐6 and SBA‐15 silica as hard templates. The structures were confirmed by small angle X‐ray diffraction, high resolution transmission electron microscopy, and N2 adsorption–desorption isotherm analysis. Both KIT‐6 cubic and SBA‐15 hexagonal mesoporous Co3O4 samples exhibited a low Néel temperature and bulk antiferromagnetic coupling due to geometric confinement of antiferromagnetic order within the nanoparticles. Mesoporous Co3O4 electrode materials have demonstrated the high lithium storage capacity of more than 1200 mAh g?1 with an excellent cycle life. They also exhibited a high specific capacitance of 370 F g?1 as electrodes in supercapacitors. |
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| Keywords: | cobalt fuel cells lithium ion battery magnetic properties mesoporous materials supercapacitor |
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