锂硫电池用还原氧化石墨烯-硫复合电极的合成与研究

IF 0.8 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Nano Research Pub Date : 2022-11-21 DOI:10.4028/p-f944iu
I. Haq, A. W. Anwar, Zunair Arslan, Abdul Waheed, U. Ilyas, F. Nasreen
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引用次数: 0

摘要

硫锂电池以其丰度高、成本低、无毒、环境友好、理论比容量高等特点,已成为具有发展前景的可充电储能设备之一。然而,硫的绝缘性和多硫化物的穿梭效应限制了它们的应用。为了缓解这些问题,使Li-S电池更有前景,我们合成了一种还原氧化石墨烯和硫的复合材料(rGO-S)作为这些电池的电极材料。本文以石墨粉为原料,采用改进的Hummer法制备氧化石墨,然后采用超声波剥离法制备氧化石墨烯(GO)。将氧化石墨烯悬浮液进行水热还原,在150℃的热风炉中加热4小时,然后以质量比为0.1:1和1:1的比例加入硫(S),再在180℃下加热4小时,制成氧化石墨烯-S复合材料。以活性物质、炭黑和聚偏氟乙烯(PVDF)为原料制备rGO-S复合材料电极。采用紫外可见光谱和傅里叶变换红外光谱对氧化石墨烯和还原氧化石墨烯样品进行了分析。采用x射线粉末衍射仪(XRD)对复合材料进行了分析,并用循环伏安法(CV)对电极的能量密度和充放电曲线进行了分析。
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Synthesis and Investigation of Reduced Graphene Oxide - Sulfur Composite Electrode for Lithium-Sulfur Battery
Lithium sulfur (Li-S) batteries have become one of the promising rechargeable storage devices due to its abundancy, low cost, non-toxicity, environmental friendliness and high theoretical specific capacity. However, the insulating nature of sulfur and the shuttling effect of polysulfides have limited their applications. In order to alleviate these problems and make Li-S batteries more promising, we have synthesized a composite of reduced graphene oxide and sulfur (rGO-S) as electrode material for these batteries. In this paper, graphite oxide was prepared from graphite powder by Improved Hummer’s method followed by ultrasonic exfoliation to make Graphene Oxide (GO). The GO suspension was hydrothermally reduced and heated in a hot air oven at 150 °C for 4 hours followed by the addition of sulfur (S) in a ratio of 0.1:1 and 1:1 by mass and heated again at 180 °C for another 4 hours to make a composite of rGO-S. The electrode of the rGO-S composite was prepared by making a slurry of active material, carbon black and polyvinylidene fluoride (PVDF). The sample of GO and rGO were analyzed using Ultraviolet (UV)-Visible and Fourier Transform Infrared (FTIR) spectroscopy. The composite material was analyzed using X-Rays Powder Diffraction (XRD) while the energy density and charge discharge curves of the electrode were analyzed using cyclic voltammetry (CV).
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来源期刊
Journal of Nano Research
Journal of Nano Research 工程技术-材料科学:综合
CiteScore
2.40
自引率
5.90%
发文量
55
审稿时长
4 months
期刊介绍: "Journal of Nano Research" (JNanoR) is a multidisciplinary journal, which publishes high quality scientific and engineering papers on all aspects of research in the area of nanoscience and nanotechnologies and wide practical application of achieved results. "Journal of Nano Research" is one of the largest periodicals in the field of nanoscience and nanotechnologies. All papers are peer-reviewed and edited. Authors retain the right to publish an extended and significantly updated version in another periodical.
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