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Mechanochemical-Assisted Synthesis of High-Entropy Metal Nitride via a Soft Urea Strategy

机译：机械化学辅助通过软尿素策略合成高熵金属氮化物

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摘要

Crystalline high-entropy ceramics (CHC), a new class of solids that contain five or more elemental species, have attracted increasing interest because of their unique structure and potential applications. Up to now, only a couple of CHCs (e.g., high-entropy metal oxides and diborides) have been successfully synthesized. Here, a new strategy for preparing high-entropy metal nitride (HEMN-1) is proposed via a soft urea method assisted by mechanochemical synthesis. The as-prepared HEMN-1 possesses five highly dispersed metal components, including V, Cr, Nb, Mo, Zr, and simultaneously exhibits an interesting cubic crystal structure of metal nitrides. By taking advantage of these unique features, HEMN-1 can function as a promising candidate for supercapacitor applications. A specific capacitance of 78 F g(-1) is achieved at a scan rate of 100 mV s(-1) in 1 M KOH. In addition, such a facile synthetic strategy can be further extended to the fabrication of other types of HEMNs, paving the way for the synthesis of HEMNs with attractive properties for task-specific applications.
机译：晶体高熵陶瓷（CHC）是一类新型的包含五个或五个以上元素种类的固体，由于其独特的结构和潜在的应用而引起了越来越多的关注。迄今为止，仅成功地合成了几种CHC（例如，高熵金属氧化物和二硼化物）。在此，提出了一种通过机械化学合成辅助的软脲法制备高熵金属氮化物（HEMN-1）的新策略。所制备的HEMN-1具有五种高度分散的金属成分，包括V，Cr，Nb，Mo，Zr，同时显示出有趣的金属氮化物立方晶体结构。通过利用这些独特的功能，HEMN-1可以作为超级电容器应用的有希望的候选者。在1 M KOH中以100 mV s（-1）的扫描速率获得78 F g（-1）的比电容。另外，这种简便的合成策略可以进一步扩展到其他类型的HEMN的制造，从而为具有特定任务应用吸引力的特性的HEMN合成铺平了道路。

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  • 来源
    《Advanced Materials》 |2018年第23期|1707512.1-1707512.5|共5页
  • 作者

    Jin Tian; Sang Xiahan; Unocic Raymond R.; Kinch Richard T.; Liu Xiaofei; Hu Jun; Liu Honglai; Dai Sheng;

  • 作者单位

    East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;

    Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA;

    Oak Ridge Natl Lab, Ctr Nanophase Mat Sci, Oak Ridge, TN 37831 USA;

    Univ Puerto Rico, Dept Chem, Rio Piedras Campus, San Juan, PR 00931 USA;

    East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;

    East China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;

    Univ Tennessee, Dept Chem, Knoxville, TN 37996 USA;

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  • 正文语种 eng
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  • 关键词

    ball milling; high-entropy; mechanochemical; multimetal nitride; supercapacitors;

    机译：球磨;高熵;机械化学;多金属氮化物;超级电容器;

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