Synthesis of Carbon Nanosheets and Nitrogen-Doped Carbon Nanosheets from Perylene Derivatives for Supercapacitor Application

材料科学 超级电容器 碳纤维 化学工程 石墨烯 纳米片 杂原子 热解 纳米技术 电容 分子 化学 电极 有机化学 复合数 复合材料 物理化学 戒指(化学) 工程类
作者
Roby Soni,Vidyanand Vijayakumar,Sreekumar Kurungot
出处
期刊:ACS applied nano materials [American Chemical Society]
卷期号:1 (9): 4576-4586 被引量:11
标识
DOI:10.1021/acsanm.8b00888
摘要

The development of an economical, eco-friendly, and easy method for the production of carbon nanosheets and heteroatom-doped carbon nanosheets has been a challenge for material scientists. In this study, we developed a method for the synthesis of carbon nanosheets (CNS) and nitrogen-doped carbon nanosheets (NCNS) of high quality from organic compounds. We exploited the electrostatic interaction among ionic crystals (NaCl in the present case) and polarized aromatic molecules (3,4,9,10-perylene tetracarboxylic dianhydride (PTCDA) and 3,4,9,10-perylene tetracarboxylic diimide (PTCDI) in this work) to obtain uniform coverage of the latter over the surface of the ionic crystal. This NaCl-PTCDA/PTCDI assembly, on pyrolysis at 700 °C followed by washing with water, yields high-quality CNS and NCNS depending on the aromatic precursor employed. The sheets obtained consist of minimum 2–3 layers (∼2 nm) as observed from atomic force microscopy. The process demonstrated is highly scalable, economical, eco-friendly, nonhazardous, and relatively fast. Moreover, the NCNS derived from PTCDI is applied for energy storage application by fabricating an electrochemical capacitor that exhibits an area normalized capacitance of 23 μF cm–2 in 0.5 M H2SO4, which is the same as that reported for the single-layer nitrogen-doped graphene. Furthermore, an NCNS–carbon black composite is prepared and applied to a high-performance solid-state supercapacitor that exhibited a capacitance of 300 mF cm–2.
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