AbstractWe present a facile one-step hydrothermal method to in situ grow nickel selenide (Ni3Se Growth of Ni_3Se_2 nanosheets on Ni foam for asymmetric supercapacitors
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Growth of Ni_3Se_2 nanosheets on Ni foam for asymmetric supercapacitors

机译:用于不对称超级电容器的Ni泡沫上Ni_3Se_2纳米片的生长

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摘要

AbstractWe present a facile one-step hydrothermal method to in situ grow nickel selenide (Ni3Se2) nanosheets on nickel (Ni) foam (Ni3Se2/Ni) by using SeO2as selenide source, Ni foam as nickel source and NaBH4as reducing agent. The mole ratio of NaBH4/SeO2is optimized as 4:1. An asymmetric supercapacitor (ASC) is fabricated by using as synthesized Ni3Se2/Ni as positive electrode and activated carbon (AC) as negative electrode. The synthesized materials and assembled devices are measured and characterized by a field emission scanning electron microscopy, powder X-ray diffraction, cyclic voltammetry, galvanostatic charge–discharge, and electrochemical impedance spectroscopy. The results shows that the as-synthesized Ni3Se2/Ni electrode possesses a high specific capacitance of 854 F g−1at 1 A g−1. The ASC can steadily operate with a high voltage of 1.6 V in 3 M KOH electrolytes, and possesses a superior energy density of 23.3 W h kg−1at a power density of 398.1 W kg−1. In addition, the Ni3Se2//AC ASC shows excellent charge/discharge stability, after 5000 cycles the capacitance retention reaches 91.11%. The excellent performance of Ni3Se2/Ni electrode is mainly due to the pseudo-capacitive by Ni3Se2and the 3D structure of Ni foam.
机译: 摘要 我们提出了一种简便的一步法水热法原位生长硒化镍(Ni 3通过使用SeO 2在镍(Ni)泡沫(Ni 3 Se 2 / Ni)上的 Se 2 )纳米片为硒化物源,泡沫镍为镍源,NaBH 4 为还原剂。 NaBH 4 / SeO 2 的摩尔比优化为4:1。以Ni 3 Se 2 / Ni为正极,活性炭(AC)为负极,制备了不对称超级电容器(ASC)。通过场发射扫描电子显微镜,粉末X射线衍射,循环伏安法,恒电流充放电和电化学阻抗谱对合成的材料和组装好的设备进行测量和表征。结果表明,合成后的Ni 3 Se 2 / Ni电极在1 A时具有854 F·g -1 的高比电容。 g <上标> -1 。 ASC可以在3M KOH电解质中以1.6V的高电压稳定运行,并在398.1 W kg(Superscript)−的功率密度下具有23.3W h kg -1 的出色能量密度1 。此外,Ni 3 Se 2 // AC ASC表现出优异的充电/放电稳定性,经过5000次循环后,电容保持率达到91.11%。 Ni 3 Se 2 / Ni电极的优异性能主要归因于Ni 3 Se 2 的伪电容。下标>和泡沫镍的3D结构。

著录项

  • 来源
    《Journal of materials science》 |2018年第6期|4649-4657|共9页
  • 作者单位

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

    Engineering Research Center of Environment-Friendly Functional Materials, Ministry of Education, Fujian Provincial Key Laboratory of Photoelectric Functional Materials, Institute of Materials Physical Chemistry, Huaqiao University;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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  • 入库时间 2022-08-17 13:43:30

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