Ordered porous Mn₃O₄@N-doped carbon/graphene hybrids derived from metal–organic frameworks for supercapacitor electrodes

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• 作者：Kuangmin Zhao ; Kezhou Lyu ; Suqin Liu ; Qingmeng Gan ; Zhen He…
• 刊名：Journal of Materials Science
• 出版年：2017
• 出版时间：January 2017
• 年：2017
• 卷：52
• 期：1
• 页码：446-457
• 全文大小：2,035 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Materials Science
  Characterization and Evaluation Materials
  Polymer Sciences
  Continuum Mechanics and Mechanics of Materials
  Crystallography
  Mechanics
  
• 出版者：Springer Netherlands
• ISSN：1573-4803
• 卷排序：52

文摘

An ordered porous Mn₃O₄@N-doped carbon/graphene (MCG) composite has been synthesized through a facile carbonization of Mn-based metal–organic frameworks (Mn-MOFs) using the poly(styrene-co-AA) spheres as the template. Because of the periodic arrangement of metal nodes and organic ligands in the Mn-MOFs, the Mn₃O₄ nanoparticles with an average diameter of 7 nm are uniformly distributed and the carbon is formed in situ in the MCG composite. The MCG exhibits a specific surface area of 326 m2 g−1 with a total pore volume of 1.02 cm3 g−1, which is much higher than that of the Mn₃O₄-based composites reported to date. In addition, the MCG displays excellent electrochemical performances in an aqueous 1 M Na₂SO₄ electrolyte with a maximum specific capacitance of 456 F g−1 at 1 A g−1 and 246 F g−1 at 20 A g−1. The MCG also owns a good cycling stability with 98.1 % of the initial capacitance remaining after 2000 cycles at 5 A g−1.