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首页> 外文期刊>Chemical engineering journal >Controllable synthesis of NiSe/MoSe2/MoO2 3D hierarchical hollow microspheres with enhanced performance for asymmetric supercapacitors
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Controllable synthesis of NiSe/MoSe2/MoO2 3D hierarchical hollow microspheres with enhanced performance for asymmetric supercapacitors

机译：NISE / MOSE2 / MOO2 3D层级中空微球的可控合成，具有增强的不对称超级电容器性能

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摘要

The application of hybrid materials with well-designed composition and morphology is an effective approach towards enhanced electrochemical performance of asymmetric supercapacitors (ASCs). Here a facile two-step growth-annealing strategy to construct a NiSe/MoSe2/MoO2 three-dimensional (3D) hierarchical hollow architecture comprising two-dimensional (2D) thin nanoflakes is reported. The reaction time and Ni/Mo mole ratio of precursor are crucial for the construction of NiSe/MoSe2/MoO2 3D hierarchical hollow microsphere (HHM). The as-synthesized NiSe/MoSe2/MoO2 3D HHM with large specific surface area and well-developed mesoporous can increase contact area between active material and electrolyte, and shorten the path and time for electrolyte ions transport, thereby achieving outstanding electrochemical performance. The NiSe/MoSe2/MoO2 3D HHM shows a high specific capacitance of 1061 F g(-1) at a current density of 2 A g(-1), exceptional rate capability (maintaining 57% of its initial capacitance at 20 A g(-1)) and stable long-term cycling performance (retaining 93.9% of its initial capacitance after 10,000 cycles at 3 A g(-1)). Moreover, the NiSe/MoSe2/MoO2 3D HHM-based ASC provides a high energy density of 48.1 Wh kg(-1) at a power density of 428 W kg(-1), and still maintains 20.4 Wh kg(-1) even at a high power density of 7.3 kW kg(-1), suggesting its great potential in superior-performance ASCs.
机译：杂化材料用设计良好设计的组成和形态学是增强不对称超级电容器（ASC）的电化学性能的有效方法。这里，包括构建包括二维（2D）薄纳米薄薄鳞状的NISE / MOSE2 / MOO2三维（3D）分层中空架构的构建的两步生长退火策略。前体的反应时间和Ni / Mo摩尔比对于NISE / MOSE2 / MOO2 3D层级中空微球（HHM）的构建至关重要。具有大的比表面积和良好的介孔的AS合成的NISE / MOSE2 / MOO2 3D HHM可以增加活性材料和电解质之间的接触面积，并缩短电解质离子传输的路径和时间，从而实现出色的电化学性能。 NISE / MOSE2 / MOO2 3D HHM以2A G（-1）的电流密度，卓越的速率能力（在20 A G中维持其初始电容的57％（ -1））和在3A G（-1）的10,000个循环后，长期循环性能（在10,000次循环后保持93.9％的初始电容）。此外，基于NISE / MOSE2 / MOO2 3D HHM的ASC以428W kg（-1）的功率密度提供48.1phkg（-1）的高能密度，仍然保持20.4WH kg（-1）高功率密度为7.3千瓦千克（-1），暗示其卓越性能ASC的潜力。

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  • 来源
    《Chemical engineering journal》 |2020年第2020期|共13页
  • 作者

    Liu Yanxia; Zheng Yiteng; Xu Qiuchen; Shi Yingying; Tian Zhangmin; Wang Ran; Zhang Guofeng; Chen Jianbin; Wang Zhen; Zheng Wenjun;

  • 作者单位

    Nankai Univ Coll Chem Dept Chem Key Lab Adv Energy Mat Chem MOE TKL Met &

    Mol Bas Tianjin 300071 Peoples R China;

    Stevens Inst Technol Dept Chem Engn &

    Mat Sci Hoboken NJ 07030 USA;

    Nankai Univ Coll Chem Dept Chem Key Lab Adv Energy Mat Chem MOE TKL Met &

    Mol Bas Tianjin 300071 Peoples R China;

    Nankai Univ Coll Chem Dept Chem Key Lab Adv Energy Mat Chem MOE TKL Met &

    Mol Bas Tianjin 300071 Peoples R China;

    Nankai Univ Coll Chem Dept Chem Key Lab Adv Energy Mat Chem MOE TKL Met &

    Mol Bas Tianjin 300071 Peoples R China;

    Nankai Univ Coll Chem Dept Chem Key Lab Adv Energy Mat Chem MOE TKL Met &

    Mol Bas Tianjin 300071 Peoples R China;

    Qilu Univ Technol Sch Chem &

    Pharmaceut Engn Shandong Acad Sci Jinan 250200 Peoples R China;

    Qilu Univ Technol Sch Chem &

    Pharmaceut Engn Shandong Acad Sci Jinan 250200 Peoples R China;

    Zhengzhou Univ Key Lab Mat Proc &

    Mold Natl Engn Res Ctr Adv Polymer Proc Technol Minist Educ Zhengzhou 450002 Peoples R China;

    Nankai Univ Coll Chem Dept Chem Key Lab Adv Energy Mat Chem MOE TKL Met &

    Mol Bas Tianjin 300071 Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学工业;
  • 关键词

    Nickel selenide; Molybdenum selenide; Molybdenum dioxide; Hybrid material; Hierarchical hollow architecture; Asymmetric supercapacitors;

    机译：硒化镍;硒化钼;二氧化钼;混合材料;等级空心结构;非对称超级电容器;

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