Ni3S2 -多孔镍@泡沫镍电极制备及其赝电容性能

Preparation of Ni3S2-Ni@Ni Foam Electrode and Its Pseudocapacitance Properties

  • 摘要: 采用氢气鼓泡法预处理泡沫镍集流体,通过循环伏安法原位电沉积Ni3S2活性材料,制备了Ni3S2-多孔镍@泡沫镍(Ni3S2-Ni@NF)电极.通过扫描电子显微镜(SEM)、X射线衍射(XRD)、光电子能谱(XPS)和拉曼光谱(Raman)对物相结构进行了表征,并利用电化学工作站测试了电化学性能.结果表明:制备的Ni3S2-Ni@NF材料表现出优异的赝电容性能,在2 mA/cm2的电流密度下,比电容达到4.56 F/cm2,且具有优异的倍率性能(20 mA/cm2的电流密度下,比电容达到4.06 F/cm2)和循环性能(10 mA/cm2的电流密度下,循环1 000次的比电容保持率约73%).

     

    Abstract: Ni3S2 coated on well-designed hierarchical porous Ni@Ni foam (Ni3S2-Ni@NF) was fabricated with the novel method of hydrogen-bubble template electrodeposition and in-situ cyclic voltammetry electrodeposition. The physical phase and morphological properties of the as prepared samples were characterized with scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and Raman spectroscopy. The electrochemical capacitance properties were tested with an electrochemical workstation. The Ni3S2-Ni@NF electrode demonstrates a much higher specific capacitance of 4.56 F/cm2 at a current density of 2 mA/cm2. The Ni3S2-Ni@NF also exhibits excellent rate capability (4.06 F/cm2 at a current density of 20 mA/cm2) and cycle performance (73% after 1 000 cycles).

     

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