Synthesis of sea-urchin shaped γ-MnO2 nanostructures and their application in lithium batteries

Jing Hui Zeng; Ye Feng Wang; Yi Yang; Jing Zhang

doi:10.1039/C0JM01711F

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Synthesis of sea-urchin shaped γ-MnO₂nanostructures and their application in lithium batteries

Jing Hui Zeng,*^ab Ye Feng Wang,^ab Yi Yang^a and Jing Zhang^a

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* Corresponding authors

^a School of Chemistry and Materials Science and Key Laboratory of Macromolecular Science of Shaanxi Province, Shaanxi Normal University, Xi'an, China
E-mail: jhzeng@ustc.edu
Tel: +86 29 8160 2488

^b NanoGEN Co. Ltd., Hefei, China

Abstract

Sea-urchin shaped γ-MnO₂ hierarchical structures have been synthesized using a facile hydrothermal method without employing any template or surfactant with mild conditions. The as-synthesized samples were characterized by instrumental analyses such as XRD, SEM, and EDXS. γ-MnO₂ sea-urchins are assembled from nanowires of 20–50 nm in width and up to 3 μm in length. Electrochemical investigations indicate that the sea-urchin shaped γ-MnO₂ hierarchical nanostructures exhibit favorable performance compared to commercial manganese dioxide as cathode active materials in rechargeable Li–MnO₂ cells. The sample retains a performance of 101 mA h g⁻¹ after 20 charge/discharge cycles.

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Article information

DOI: https://doi.org/10.1039/C0JM01711F
Article type: Paper
Submitted: 02 Jun 2010
Accepted: 06 Sep 2010
First published: 18 Oct 2010

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J. Mater. Chem., 2010,20, 10915-10918

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Synthesis of sea-urchin shaped γ-MnO₂ nanostructures and their application in lithium batteries

J. H. Zeng, Y. F. Wang, Y. Yang and J. Zhang, J. Mater. Chem., 2010, 20, 10915 DOI: 10.1039/C0JM01711F

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Journal of Materials Chemistry