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首页> 外文期刊>Advanced Functional Materials >Molecular Design of Mesoporous NiCo2O4 and NiCo2S4 with Sub-Micrometer-Polyhedron Architectures for Efficient Pseudocapacitive Energy Storage
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Molecular Design of Mesoporous NiCo2O4 and NiCo2S4 with Sub-Micrometer-Polyhedron Architectures for Efficient Pseudocapacitive Energy Storage

机译：具有亚微米多面体结构的介孔NiCo2O4和NiCo2S4分子设计，用于高效伪电容储能

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摘要

Spinel-type NiCo2O4 (NCO) and NiCo2S4 (NCS) polyhedron architectures with sizes of 500-600 nm and rich mesopores with diameters of 1-2 nm are prepared facilely by the molecular design of Ni and Co into polyhedron-shaped zeolitic imidazolate frameworks as solid precursors. Both as-prepared NCO and NCS nanostructures exhibit excellent pseudocapacitance and stability as electrodes in supercapacitors. In particular, the exchange of O2- in the lattice of NCO with S2- obviously improves the electrochemical performance. NCS shows a highly attractive capacitance of 1296 F g(-1) at a current density of 1 A g(-1), ultrahigh rate capability with 93.2% capacitance retention at 10 A g(-1), and excellent cycling stability with a capacitance retention of 94.5% after cycling at 1 A g(-1) for 6000 times. The asymmetric supercapacitor with an NCS negative electrode and an active carbon positive electrode delivers a very attractive energy density of 44.8 Wh kg(-1) at power density 794.5 W kg(-1), and a favorable energy density of 37.7 Wh kg(-1) is still achieved at a high power density of 7981.1 W kg(-1). The specific mesoporous polyhedron architecture contributes significantly to the outstanding electrochemical performances of both NCO and NCS for capacitive energy storage.
机译：通过将Ni和Co分子设计成多面体形的沸石咪唑盐骨架，可以方便地制备出尖晶石型NiCo2O4（NCO）和NiCo2S4（NCS）多面体结构，尺寸为500-600 nm，直径为1-2 nm的富介孔。固体前体。制备的NCO和NCS纳米结构均具有出色的伪电容和稳定性，可作为超级电容器中的电极使用。特别是，NCO晶格中的O2-与S2-的交换明显改善了电化学性能。 NCS在1 A g（-1）的电流密度下显示出1296 F g（-1）的极具吸引力的电容，超高倍率能力以及在10 A g（-1）时的93.2％电容保持率以及出色的循环稳定性在1 A g（-1）循环6000次后，电容保持率为94.5％。具有NCS负电极和活性碳正电极的非对称超级电容器在功率密度794.5 W kg（-1）时提供了非常吸引人的44.8 Wh kg（-1）能量密度，以及37.7 Wh kg（-）的有利能量密度。 1）仍可在7981.1 W kg（-1）的高功率密度下实现。特殊的介孔多面体结构极大地有助于NCO和NCS在电容性储能方面的出色电化学性能。

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  • 来源
    《Advanced Functional Materials》 |2017年第28期|1701229.1-1701229.10|共10页
  • 作者

    Liu Yu; Wang Zhenbin; Zhong Yijun; Tade Moses; Zhou Wei; Shao Zongping;

  • 作者单位

    Curtin Univ, Dept Chem Engn, Perth, WA 6845, Australia;

    Univ Sci & Technol China, Dept Mat Sci & Engn, Hefei 230026, Anhui, Peoples R China;

    Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xin Mofan Rd, Nanjing 210009, Jiangsu, Peoples R China;

    Curtin Univ, Dept Chem Engn, Perth, WA 6845, Australia;

    Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xin Mofan Rd, Nanjing 210009, Jiangsu, Peoples R China;

    Curtin Univ, Dept Chem Engn, Perth, WA 6845, Australia|Nanjing Tech Univ, Jiangsu Natl Synerget Innovat Ctr Adv Mat SICAM, State Key Lab Mat Oriented Chem Engn, Coll Chem Engn, 5 Xin Mofan Rd, Nanjing 210009, Jiangsu, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    nickel cobalt oxide; nickel cobalt sulfide; supercapacitors; zeolitic imidazolate frameworks;

    机译：氧化钴镍;硫化镍钴;超级电容器;咪唑沸石沸石骨架;

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