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Rapid Low-cost Synthesis and Enhanced Electrochemical Properties of Mesoporous Mn3O4 Nanorods

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Author(s): HU Ying-Ying, WEN Zhao-Yin, JIN Jun

Journal: Journal of Inorganic Materials
ISSN 1000-324X

Volume: 28;
Issue: 9;
Start page: 1045;
Date: 2013;
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Keywords: manganese oxide; mesoporous; nanorod; lithium-ion battery

ABSTRACT
Mesoporous Mn3O4 nanorods, as anode materials for Li-ion batteries, were fabricated by a novel process using only ethanol and manganese acetate tetrahydrate as the reaction precursors. The as-prepared mesoporous Mn3O4 nanorods were characterized by X-ray diffraction, thermogravimetry-differential scanning calorimetry, scanning electron microscope, transmission electron microscope and Brunauer-Emmett-Teller surface area analyzer. The results indicate that the average diameter of mesoporous Mn3O4 nanorods is about 150 nm, and their pore size is mainly distributed in the range of 6–20 nm with the BET specific surface area as high as 37.3 m2/g. The Mn3O4 nanorods anode displays reversible capacities of 676.1 and 662.4 mAh/g after 100 cycles at a current rate of 141 mA/g, demonstrating a higher capacity and more stable cyclability than Mn3O4 nano-powders. Furthermore, excellent rate capability is realized with the mesoporous Mn3O4 nanorods. A capacity of 850 mAh/g is retained after 80 cycles at various current densities.
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