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Hydrothermal synthesis of nanostructured MnO2 under magnetic field for rechargeable lithium batteries

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Abstract

Nanocrystalline MnO2 was synthesized by the hydrothermal method with or without pulsed magnetic fields. It was found that the morphology of the MnO2 prepared without magnetic field has an urchin-like structure, while the MnO2 prepared with magnetic fields has a rambutan-like structure. A pronounced increase in the Brunauer–Emmett–Teller specific surface area was obtained when the intensities of the pulsed magnetic fields increased. The battery performances were improved for the samples prepared with magnetic fields. The MnO2 prepared under a magnetic field of 4 T shows a capacity of 121.8 mAh g−1, while the MnO2 prepared without magnetic field only shows 103.0 mAh g−1 after 30 cycles.

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Acknowledgments

Financial support provided by the Australian Research Council through ARC Centre of Excellence for Electromaterials Science funding, ARC Discovery Project (DP 0987805) funding, the International Cooperation Program of the Science & Technology Committee of Shanghai Municipality (075207036), and the Program for Changjiang Scholars and Innovative Research Team in University (IRT0739) are gratefully acknowledged. Many thanks also go to Dr. T. Silver for critical reading of the manuscript.

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Authors and Affiliations

  1. Institute for Superconducting and Electronic Materials and ARC Centre of Excellence for Electromaterials Science, University of Wollongong, Wollongong, NSW, 2522, Australia

    Chao Zhong, Jia-Zhao Wang, Shu-Lei Chou & Hua-Kun Liu

  2. School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW, 2522, Australia

    Zhi-Xin Chen

  3. School of Materials Science and Engineering, Shanghai University, Shanghai, People’s Republic of China

    Zhen-Zhen Zhu & Ying Li

Authors
  1. Chao Zhong
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  2. Jia-Zhao Wang
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  3. Zhen-Zhen Zhu
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  4. Shu-Lei Chou
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  5. Zhi-Xin Chen
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  6. Ying Li
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  7. Hua-Kun Liu
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Correspondence to Chao Zhong or Jia-Zhao Wang.

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Zhong, C., Wang, JZ., Zhu, ZZ. et al. Hydrothermal synthesis of nanostructured MnO2 under magnetic field for rechargeable lithium batteries. J Solid State Electrochem 14, 1743–1747 (2010). https://doi.org/10.1007/s10008-009-0992-1

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  • DOI: https://doi.org/10.1007/s10008-009-0992-1

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