纳米Co3O4的合成、表征及其在锂离子电池中的应用

IF 1.4 Q4 NANOSCIENCE & NANOTECHNOLOGY

Journal of Nanostructures Pub Date : 2020-07-01 DOI:10.22052/JNS.2020.03.014

A. D. Khalaji, M. Jarošová, P. Machek, Kunfeng Chen, D. Xue

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引用次数: 1

摘要

本研究报道了一种方便、简单、快速的制备纳米Co3O4的方法，即在苯甲酸存在下，以1:1的质量比煅烧Co(NO3)2∙6H2O制备纳米Co3O4。利用x射线粉末衍射(XRD)和透射电子显微镜(TEM)对制备的Co3O4纳米颗粒进行了表征。XRD结果证实了纳米Co3O4为纯相，纳米Co3O4平均晶粒尺寸为77 nm。TEM图像显示纳米颗粒尺寸在50 ~ 100 nm之间，这与XRD图计算的平均晶粒尺寸一致。并对制备的Co3O4纳米颗粒作为锂离子电池负极材料进行了研究。结果表明，Co3O4纳米颗粒具有优异的电化学性能和循环稳定性，在100 mAg-1下可获得1127 mA h -1的放电容量，并且具有高达130次的高倍率放电性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Co3O4 Nanoparticles : Synthesis, Characterization and Its Application as Performing Anode in Li-Ion Batteries

In this research, a convenient, simple and rapid route for the preparation of Co3O4 nanoparticles using the calcination of Co(NO3)2∙6H2O at the presence of benzoic acid (1:1 weight ratio) is reported. Further, the as-prepared Co3O4 nanoparticles were characterized by X-ray powder diffraction (XRD) and transmission electron microscopy (TEM). XRD result confirmed the Co3O4 nanoparticles are pure phase and the average crystallite size for Co3O4 nanoparticles was found 77 nm. The TEM images reveal nanoparticles with size ranging from 50 to 100 nm, which is in conformity with the calculation of average crystallite sizes from XRD patterns. Furthermore, the prepared Co3O4 nanoparticles were investigated as an anode material for Li-ion batteries. Results showed that the Co3O4 nanoparticles exhibited excellent electrochemical performance and cycling stability, a capacity of 1127 mA h g-1 was obtained at 100 mAg-1 and the samples exhibited stable discharge behavior up to 130 cycles with high rate capability.

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来源期刊

Journal of Nanostructures NANOSCIENCE & NANOTECHNOLOGY-

CiteScore

2.60

自引率

0.00%

发文量

审稿时长

7 weeks

期刊介绍： Journal of Nanostructures is a medium for global academics to exchange and disseminate their knowledge as well as the latest discoveries and advances in the science and engineering of nanostructured materials. Topics covered in the journal include, but are not limited to the following: Nanosystems for solar cell, energy, catalytic and environmental applications Quantum dots, nanocrystalline materials, nanoparticles, nanocomposites Characterization of nanostructures and size dependent properties Fullerenes, carbon nanotubes and graphene Self-assembly and molecular organization Super hydrophobic surface and material Synthesis of nanostructured materials Nanobiotechnology and nanomedicine Functionalization of nanostructures Nanomagnetics Nanosensors.