Plasma-induced, nitrogen-doped graphene-based aerogels for high-performance supercapacitors

Light, Science & Applications
Xue-Yu ZhangDa-Bing Li

Abstract

Commonly used energy storage devices include stacked layers of active materials on two-dimensional sheets, and the limited specific surface area restricts the further development of energy storage. Three-dimensional (3D) structures with high specific surface areas would improve device performance. Herein, we present a novel procedure to fabricate macroscopic, high-quality, nitrogen-doped, 3D graphene/nanoparticle aerogels. The procedure includes vacuum filtration, freeze-drying, and plasma treatment, which can be further expanded for large-scale production of nitrogen-doped, graphene-based aerogels. The behavior of the supercapacitor is investigated using a typical nitrogen-doped graphene/Fe3O4 nanoparticle 3D structure (NG/Fe3O4). Compared with 3D graphene/Fe3O4 structures prepared by the traditional hydrothermal method, the NG/Fe3O4 supercapacitor prepared by the present method has a 153% improvement in specific capacitance, and there is no obvious decrease in specific capacitance after 1000 cycles. The present work provides a new and facile method to produce large-scale, 3D, graphene-based materials with high specific capacitance for energy storage.

References

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Citations

Jan 23, 2019·Nanotechnology·Bingyan XuHuan Pang
Mar 16, 2019·Nanoscale Research Letters·Zhiwei TangWei Lü
Feb 6, 2020·The Journal of Physical Chemistry Letters·Yan WangHong-Bo Sun
May 4, 2018·ACS Applied Materials & Interfaces·Hao-Bo JiangHong-Bo Sun

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Methods Mentioned

BETA
chemical vapor deposition
X-ray
infrared spectroscopy
scanning electron microscopy

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