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首页> 外文期刊>Advanced Functional Materials >Spinel ZnMn_2O_4 Nanocrystal-Anchored 3D Hierarchical Carbon Aerogel Hybrids as Anode Materials for Lithium Ion Batteries
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Spinel ZnMn_2O_4 Nanocrystal-Anchored 3D Hierarchical Carbon Aerogel Hybrids as Anode Materials for Lithium Ion Batteries

机译：尖晶石ZnMn_2O_4纳米锚定3D分层碳气凝胶杂化材料作为锂离子电池的负极材料

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摘要

To improve the electrochemical performance of spinel ZnMn_2O_4, i.e., its limited specific capacity, cycling performance, and rate properties, owing to its inherent poor electrical conductivity and large volume changes during lithia-tion and delithiation processes, spinel ZnMn_2O_4 nanocrystals are anchored into a three dimensional (3D) porous carbon aerogel (CA) through a facile solution immersion chemical route. The designed 3D spinel ZnMn_2O_4/CA hybrids display the advantages of both spinel ZnMn_2O_4 and porous CA: enormous interfacial surface area, connected 3D framework, abundant porosity and high electron transport properties of CA, and electrochemical properties of nanostructured spinel ZnMn_2O_4 oxide materials. The synthesized novel ZnMn_2O_4/CA hybrids display a significantly improved electrochemical performance, with a high reversible specific capacity, and high-rate capability, as well as an excellent cycling performance, superior to that of previously reported ZnMn_2O_4-based materials. After 50 cycles, the 50%ZnMn_2O_4/CA hybrid displays a reversible capacity of 833 mAh g~(-1) at a current density of 100 mAg~(-1), much higher than the theoretical capacity of 784 mAh g~(-1) for pure spinel ZnMn_2O_4 materials, corresponding to a Coulombic efficiency of 99.9%. The greatly improved cycle stability, specific capacity, and high rate performance of the ZnMn_2O_4/CA hybrids can be attributed to the synergistic interaction between spinel-structured ZnMn_2O_4 nanoparticles and the 3D interconnected porous CA matrix.
机译：为了改善尖晶石ZnMn_2O_4的电化学性能，即有限的比容量，循环性能和倍率性能，由于其固有的差的电导率以及在锂化和脱锂过程中的大体积变化，将尖晶石ZnMn_2O_4纳米晶体锚定为三个三维（3D）多孔碳气凝胶（CA）通过简便的溶液浸没化学路线。设计的3D尖晶石ZnMn_2O_4 / CA杂化物显示出尖晶石ZnMn_2O_4和多孔CA的优点：巨大的界面表面积，相连的3D骨架，CA的孔隙率和高电子传输性能以及纳米结构的尖晶石ZnMn_2O_4氧化物材料的电化学性能。合成的新型ZnMn_2O_4 / CA杂化物表现出显着改善的电化学性能，具有高可逆比容量，高倍率容量以及出色的循环性能，优于以前报道的ZnMn_2O_4基材料。经过50个循环后，在电流密度为100 mAg〜（-1）时，50％ZnMn_2O_4 / CA杂化物显示出833 mAh g〜（-1）的可逆容量，远高于理论容量784 mAh g〜（-1）。 1）对于纯尖晶石ZnMn_2O_4材料，对应的库仑效率为99.9％。 ZnMn_2O_4 / CA杂化物的循环稳定性，比容量和高倍率性能的极大提高可归因于尖晶石结构的ZnMn_2O_4纳米粒子与3D互连多孔CA基质之间的协同相互作用。

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  • 来源
    《Advanced Functional Materials》 |2014年第26期|4176-4185|共10页
  • 作者

    Longwei Yin; Zhiwei Zhang; Zhaoqiang Li; Fengbin Hao; Qun Li; Chengxiang Wang; Runhua Fan; Yongxin Qi;

  • 作者单位

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

    Key Laboratory for Liquid-Solid Structural Evolution and Processing of Materials Ministry of Education School of Materials Science and Engineering Shandong University Jinan 250061, PR China;

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