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非晶态碳纳米管-氧化镍纳米花杂化物：一种低成本储能材料。

Amorphous Carbon Nanotubes-Nickel Oxide Nanoflower Hybrids: A Low Cost Energy Storage Material.

作者信息

Banerjee Diptonil, Ghorai Uttam Kumar, Das Nirmalya Sankar, Das Biswajit, Thakur Subhasish, Chattopadhyay Kalyan Kumar

机构信息

Dr. M.N. Dastur School of Materials Science Engineering Botanic Garden, Indian Institute of Engineering Science and Technology, Shibpur, 711103 Howrah, India.

Department of Industrial Chemistry, Ramakrishna Mission Vidyamandira, Belur Math, 711202 Howrah, India.

出版信息

ACS Omega. 2018 Jun 12;3(6):6311-6320. doi: 10.1021/acsomega.8b00798. eCollection 2018 Jun 30.

DOI:10.1021/acsomega.8b00798
PMID:31458813
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6644548/
Abstract

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.

摘要

非晶态碳纳米管（a-CNTs）已通过一种简单的低温工艺合成，并与不同浓度的化学合成氧化镍微花进行了接枝。通过X射线衍射、场发射扫描和透射电子显微镜对所制备的纯样品和混合样品的相和形态进行了表征。使用热重分析和差示热分析估计了样品的热性能。通过紫外可见光谱、拉曼光谱和傅里叶变换红外光谱分析对样品的光学性能进行了表征。针对不同扫描速率以及通过充放电分析，详细研究了所有混合样品的电化学性能。可以看出，由于氧化镍接枝，纯a-CNTs的电化学性能显著增强。最佳样品的混合材料的比电容值约为120 F/g，几乎是纯a-CNTs的12倍。已根据混合样品有效表面积的变化以及电导率的变化对结果进行了解释。

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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdc8/6644548/64f28960aab4/ao-2018-00798c_0004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdc8/6644548/578cde10f57b/ao-2018-00798c_0005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdc8/6644548/1556c9d7b5cf/ao-2018-00798c_0007.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdc8/6644548/8d088b380292/ao-2018-00798c_0008.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/cdc8/6644548/242f4191373a/ao-2018-00798c_0009.jpg
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