Amorphous carbon nanotubes (a-CNTs) have been synthesized by a simple low-temperature process and have been grafted with chemically synthesized nickel oxide microflowers with different concentrations. The phase and morphology of the as-prepared pure and hybrid samples were characterized by X-ray diffraction and field emission scanning and transmission electron microscopes. Thermal properties of the samples were estimated by using thermal gravimetric and differential thermal analysis. The optical properties of the sample were characterized by UV–vis spectroscopic, Raman spectroscopic, and Fourier-transformed infrared spectroscopic analysis. The electrochemical performance of all hybrid samples has been done in detail for different scan rates as well as from charge–discharge analysis. It has been seen that because of the nickel oxide grafting, the electrochemical performance of pure a-CNTs gets enhanced significantly. The value of the specific capacitance of the hybrid comes out to be around 120 F/g for the best sample, which is almost 12 times higher compared to that of the pure a-CNTs. The result has been explained in terms of change in effective surface area as well as change in conductivity of the hybrid samples.

中文翻译：

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非晶碳纳米管–氧化镍纳米花杂化物：一种低成本的储能材料

非晶碳纳米管（a-CNTs）是通过简单的低温工艺合成的，并已接枝了化学合成的不同浓度的氧化镍微花。通过X射线衍射，场发射扫描和透射电子显微镜表征所制备的纯净样品和混合样品的相和形态。通过使用热重量分析和差热分析来估计样品的热性质。样品的光学特性通过紫外可见光谱，拉曼光谱和傅立叶变换红外光谱分析进行表征。所有杂化样品的电化学性能已针对不同的扫描速率以及充放电分析进行了详细说明。已经发现，由于氧化镍接枝，纯α-CNTs的电化学性能得到显着提高。对于最佳样品，混合材料的比电容值约为120 F / g，这比纯a-CNT的比电容高将近12倍。已经根据有效表面积的变化以及混合样品的电导率的变化来解释了结果。