Effect of Graphite Precursor Flake Size on Energy Storage Capabilities of Graphene Oxide Supercapacitors

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Accounts of Chemical Research Pub Date : 2021-03-17 DOI:10.23919/SAIEE.2021.9432895

S. Perumal;A.L.L. Jarvis;M.Z. Gaffoor

引用次数: 2

Abstract

In this research supercapacitors were fabricated using graphene oxide (GO) as the electrode material. GO was synthesized using natural graphite precursor with varying flake sizes. GO was characterized by High-Resolution Transmission Electron Microscopy (HRTEM), Elemental Analysis, Fourier Transform Infrared (FTIR) spectroscopy and Raman spectroscopy. Cyclic voltammetry was carried out at different scan rates to determine the specific capacitance and energy density of the electrode material. An increase in specific capacitance was seen with an increase in graphite precursor flake size. A specific capacitance and energy density of 204.22 F.g ⁻¹ and 102.11 kJ.kg ⁻¹ respectively at scan rate 10 mV.s ⁻¹ was obtained for the GO sample synthesized from graphite precursor with an average particle size of 0.45 mm. This sample also had the highest specific capacitance for all scan rates.

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石墨前驱体薄片尺寸对氧化石墨烯超级电容器储能性能的影响

本研究以氧化石墨烯（GO）为电极材料制备了超级电容器。采用不同薄片尺寸的天然石墨前驱体合成了GO。采用高分辨透射电子显微镜（HRTEM）、元素分析、傅立叶变换红外光谱（FTIR）和拉曼光谱对GO进行了表征。在不同的扫描速率下进行循环伏安法，以确定电极材料的比电容和能量密度。比电容随着石墨前体薄片尺寸的增加而增加。由平均粒径为0.45 mm的石墨前驱体合成的GO样品在扫描速率为10 mV.s−1时获得了204.22 F.g−1和102.11 kJ.kg−1的比电容和能量密度。该样品在所有扫描速率下也具有最高的比电容。

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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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.