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首页> 外文期刊>Nanotechnology >Enhanced tortuosity for electrolytes in microwave irradiated self-organized carbon-doped Ni/Co hydroxide nanocomposite electrodes with higher Ni/Co atomic ratio and rate capability for an asymmetric supercapacitor
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Enhanced tortuosity for electrolytes in microwave irradiated self-organized carbon-doped Ni/Co hydroxide nanocomposite electrodes with higher Ni/Co atomic ratio and rate capability for an asymmetric supercapacitor

机译：用于微波辐射的自组织碳掺杂Ni / Co氢氧化物纳米复合电极的电解质增强曲折，具有较高的Ni / Co原子比和不对称超级电容器的速率能力

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摘要

We demonstrate a green, facile and rapid microwave-mediated process for fabricating carbon black(CB) incorporated Ni/Co hydroxide porous nanocomposites and study the effect of various mass loading of CB on supercapacitor performance. The structure and interactions between CB and Ni/Co hydroxide are characterized by using x-ray diffraction, Fouriertransform infrared spectroscopy and x-ray photoelectron spectroscopy, which suggest the miniaturization of the single-phase Ni/Co hydroxide formation time. A morphology study reveals that the addition of CB into Ni/Co hydroxide develops a loose network structure with well-defined architectural pores. In addition, the nanocomposites demonstrate noticeable improvements in porosity and atomic ratio of Ni/Co with an increasing percentage of carbon, which results in a higher diffusion of electrolytes, and hence electrical conduction. The developed electrode materials exhibit a maximum specific capacitance value of 1526 Fg(-1) at current density 1 Ag-1 with excellent cyclic stability(92% retention at 5000 cycles), energy density(76 Wh Kg(-1)), power density(250W Kg(-1)) and rate capability. A solid state asymmetric supercapacitor device is fabricated and utilized to brighten a commercial LED effectively for validating real usage.
机译：我们证明了用于制造并入的Ni / Co的炭黑（CB）氢氧化物纳米复合材料多孔绿色，容易和快速的微波介导的过程和学习CB的各种质量负荷对超级电容器性能的影响。氢氧化物的特征在于通过使用X射线衍射CB和Ni / Co的之间的结构和相互作用，傅里叶变换红外光谱和X射线光电子能谱法，其中建议的单相的Ni / Co氢氧化物的形成时间的小型化。甲形态学研究表明，在加入CB的成的Ni / Co氢氧化物开发具有良好定义的体系结构的孔的松散网络结构。另外，纳米复合材料表现出在孔隙率和碳的增加百分比，这导致电解质的更高的扩散的Ni / Co的原子比，并且因此电传导显着的改进。所开发的电极材料在电流密度1的Ag-1表现出1526 FG（-1）的最大比电容值具有优异的循环稳定性（在5000次循环92％保持率），能量密度（瓦76公斤（-1）），功率密度（250W公斤（-1））和倍率性能。一种固态的不对称超级电容器装置被制造和利用有效照亮商用LED用于验证实际使用。

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