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首页> 外文期刊>RSC Advances >Facile controlled synthesis of a hierarchical porous nanocoral-like Co3S4 electrode for high-performance supercapacitors
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Facile controlled synthesis of a hierarchical porous nanocoral-like Co3S4 electrode for high-performance supercapacitors

机译：适用于高性能超级电容器的等级多孔纳米陶瓷状CO3S4电极的体积控制合成

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A facile one-step hydrothermal process is developed to synthesize a porous nanocoral-like Co _(3) S _(4) , which directly grows on a three dimensional (3D) macroporous nickel (Ni) foam. The scanning electron microscopy (SEM) images reveal the uniform formation of a Co _(3) S _(4) nanocoral cluster on Ni foam with a hierarchical porous structure. The crystal growth mechanism and factors that influence the formation of the coral-like Co _(3) S _(4) directly on Ni foam have been further studied. The subsequent electrochemical measurements demonstrate that the nanocoral-like Co _(3) S _(4) as a binder-free electrode for supercapacitors possesses a large specific capacitance as high as 1559 F g ~(?1) at a current density of 0.5 A g ~(?1) in 2.0 M KOH aqueous electrolyte. Moreover, to confirm its practical application, an asymmetric supercapacitor is assembled with the nanocoral-like Co _(3) S _(4) electrode as the positive electrode and activated carbon (AC) as the negative electrode. Such a device achieves a high energy density of 60.1 W h kg ~(?1) at a power density of 418.2 W kg ~(?1) and maintains 38.5 W h kg ~(?1) at a high power density of 3812.5 W kg ~(?1) , suggesting that the presented nanocoral-like Co _(3) S _(4) electrode not only has potential for applying in high energy density fields, but also in high power density applications.
机译：开发了一种容易的一步水热过程以合成多孔纳米陶瓷状CO _（3）S _（4），其直接在三维（3D）大孔镍（Ni）泡沫上生长。扫描电子显微镜（SEM）图像揭示了Ni泡沫上的Co _（3）S _（4）纳米簇的均匀形成，其具有分层多孔结构。进一步研究了晶体生长机理和影响珊瑚样CO_（3）的形成的因素直接在Ni泡沫上进行。随后的电化学测量表明，作为超级电容器的无粘合剂电极的纳米织物CO _（3）S _（4）具有高达1559 f G〜（α1）的大小的小电容，其电流为0.5在2.0M KOH水性电解质中的G〜（α1）。此外，为了确认其实际应用，不对称超级电容器与纳米陶瓷状Co _（3）S _（4）电极作为正极和活性炭（AC）作为负电极组装。这种装置以418.2Wkg〜（α1）的功率密度，以418.2Wkg〜（α1）的高能量密度为60.1W H kg〜（α1），并以3812.5W的高功率密度维持38.5WH kg〜（α1） kg〜（α1），建议所示的纳米陶瓷状Co _（3）S _（4）电极不仅具有在高能量密度场中施加的电位，而且还具有高功率密度应用。

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