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首页> 外文期刊>Materials Focus >Crystallization of MnO_2 by Microwave-Hydrothermal Synthesis and Its Applications for Supercapacitors and Lithium-Ion Batteries
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Crystallization of MnO_2 by Microwave-Hydrothermal Synthesis and Its Applications for Supercapacitors and Lithium-Ion Batteries

机译:微波水热法合成MnO_2的结晶及其在超级电容器和锂离子电池中的应用

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摘要

MnO_2 with different crystal phases, β- and γ-MnO_2 and various morphologies, rod-, wire-, and plate-like structures, have been crystallized by microwave-hydrothermal method. Time dependent studies reveal that the shapes and phases of MnO_2 can be transformed from wire- and plate-like structured γ-MnO_2 to rod-like structured β-MnO_2. In addition, the crystal phases and morphologies can be controlled by finely adjusting the reaction temperatures and times. The microwave-hydrothermally synthesized MnO_2 were investigated as potential electrode materials for supercapacitors and lithium ion battery cathodes. Low reaction temperature and short reaction time can improve the electrochemical performances of MnO_2. The present results prove that γ-MnO_2 with 1 × 2 tunnel-structures have higher electrochemical performances than that of β-MnO_2 with 1 × 1 tunnels. The crystallization of MnO_2 with proper structures and morphologies can achieve better performance in their applications.
机译:通过微波水热法结晶了具有不同晶相,β-和γ-MnO_2以及各种形态,棒状,线状和板状结构的MnO_2。随时间变化的研究表明,MnO_2的形状和相可以从线状和板状的γ-MnO_2转变为棒状的β-MnO_2。另外,可以通过精细调节反应温度和时间来控制晶相和形态。研究了微波水热合成MnO_2作为超级电容器和锂离子电池正极的电极材料。反应温度低,反应时间短可以提高MnO_2的电化学性能。结果表明,具有1×2隧道结构的γ-MnO_2具有比具有1×1隧道的β-MnO_2更高的电化学性能。具有适当结构和形态的MnO_2的结晶可以在其应用中获得更好的性能。

著录项

  • 来源
    《Materials Focus》 |2013年第2期|86-91|共6页
  • 作者单位

    State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China,School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;

    Materials Research Laboratory, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA;

    State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China,School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;

    Materials Research Laboratory, Materials Research Institute, The Pennsylvania State University, University Park, PA 16802, USA;

    State Key Laboratory of Rare Earth Resource Utilization, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, P. R. China,School of Chemical Engineering, Dalian University of Technology, Dalian, 116024, China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    MnO_2; Microwave-Hydrothermal Method; Supercapacitor; Lithium-Ion Battery;

    机译:MnO_2;微波水热法;超级电容器锂离子电池;

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