期刊
NANOMATERIALS
卷 10, 期 6, 页码 -出版社
MDPI
DOI: 10.3390/nano10061178
关键词
supercapacitors; graphene based aerogel; porosity
类别
资金
- Center for Nanoscience and Technology, Anna University
- DST nanomission
Nitrogen-doped graphene-based aerogels with three levels of hierarchically organized pores were prepared via a simple environmentally friendly process, and successfully tested in supercapacitor applications. Mesopores and macropores were formed during the aerogel preparation followed by carbonization and its chemical activation by potassium hydroxide (KOH). These mesopores and macropores consist of amorphous carbon and a 3D graphene framework. Thermal treatment at 700 degrees C, 800 degrees C, 900 degrees C in N(2)atmosphere was done to etch out the amorphous carbon and obtain a stable N-doped 3D graphene. Specific capacitance values obtained from the electrochemical measurements are in the range of 232-170 Fx g(-1). The thus fabricated structures showed excellent cyclic stability, suggesting that these materials have potential as electrodes for solid asymmetric supercapacitors.
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