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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis of ultrafine CoNi2S4 nanowire on carbon cloth as an efficient positive electrode material for high-performance hybrid supercapacitors
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Synthesis of ultrafine CoNi2S4 nanowire on carbon cloth as an efficient positive electrode material for high-performance hybrid supercapacitors

机译：用于高性能杂交超级电容器的高效正电极材料的碳布超细综合征纳米线的合成

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摘要

Rational designing and preparing of electrode materials with desirable electrochemical performance by a simple, efficient and safe method is of great significance for electrochemical energy storage devices, but it is also challenging. In this study, ultrafine CoNi2S4 nanowire arrays directly grown on carbon cloth (CC) are synthesized by sulfuration of Co-Ni hydroxide precursor. Benefiting from the high conductivity, the synergistic effect between Co and Ni ions and open self-supporting three-dimensional (3D) nanoarchitectures constructed by 1D CoNi2S4 ultrafine nanowires, the as-obtained CoNi2S4@CC electrode exhibits excellent electrochemical capacitance performances: high specific capacitance of 1872 F g(-1) at 1 A g(-1) and 1565 F g(-1) at 5 A g(-1). Meanwhile, a battery-supercapacitor hybrid (BSH) device is fabricated using the as-obtained CoNi2S4@CC as the positive electrode and porous carbon nanosheets (PCNS) derived from wood fungus as the negative electrode. The constructed BSH exhibits a high energy density of 37.2 Wh kg(-1) at a power density of 0.75 kW kg(-1), as well as a robust long-term cycling stability (97.6% capacitance retention after 10 000 charge-discharge cycles at a constant current density of 1 A g(-1)). These outstanding results verify CoNi2S4 material has potential application in the energy storage field and it has been explored and expected to be the promising electrode materials for the supercapacitor. (C) 2020 Elsevier B.V. All rights reserved.
机译：通过简单，高效和安全的方法具有所需的电化学性能的理性设计和制备电极材料对于电化学能量存储装置具有重要意义，但它也是具有挑战性的。在该研究中，通过CO-Ni氢氧化物前体硫化，通过CO-Ni氢氧化物前体直接生长在碳布（CC）上纳米线阵列。受益于高导电性，CO和Ni离子之间的协同效应和由1D CON2S4超细纳米线构成的CC和Ni离子的开放式三维（3D）纳米建筑，AS获得的CC电极具有优异的电化学电容性能：高特定电容1872V（-1）在1A的1A（-1）和1565fg（-1），5Ag（-1）。同时，使用AS获得的CONI2S4 @ CC作为正极和多孔碳纳米片（PCNS）作为负电极的正极和多孔碳纳米片（PCNS）制造了电池超级电容器杂交（BSH）装置。构造的BSH以0.75kW kg（-1）的功率密度，以及稳健的长期循环稳定性（10 000充放电后97.6％电容保留97.6％电容保留，高能量密度为37.2WH kg（-1），以及稳健的长期循环稳定性，循环以1ag（-1）的恒定电流密度）。这些优异的结果验证了Coni2S4材料在能量存储领域具有潜在的应用，并且已经探索并预期是超级电容器的有希望的电极材料。 （c）2020 Elsevier B.v.保留所有权利。

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