超级电容器
材料科学
气凝胶
介孔材料
碳化
石墨烯
氢氧化钾
化学工程
碳纤维
无定形固体
电容
无定形碳
纳米技术
热处理
电极
复合材料
复合数
有机化学
化学
扫描电子显微镜
催化作用
工程类
物理化学
作者
Ayshuwarya Kandasamy,T. Rajendran,Ayesha Samrin.,N. Padmanathan,Mohan Ramesh,Olha Bazaka,Igor Levchenko,Kateryna Bazaka,M. Mandhakini
出处
期刊:Nanomaterials
[MDPI AG]
日期:2020-06-17
卷期号:10 (6): 1178-1178
被引量:13
摘要
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 °C, 800 °C, 900 °C in N2 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 F× 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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