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Ethylenediamine-Catalyzed Preparation of Nitrogen-Doped Hierarchically Porous Carbon Aerogel under Hypersaline Condition for High-Performance Supercapacitors and Organic Solvent Absorbents

Authors :
Jin Qiuyang
Fangna Dai
Junxi Zhou
Guohua Li
Jiaxing Yang
Jing Gao
Tong Mingxing
Xuan Zhang
Source :
Nanomaterials, Volume 9, Issue 5, Nanomaterials, Vol 9, Iss 5, p 771 (2019)
Publication Year :
2019
Publisher :
Multidisciplinary Digital Publishing Institute, 2019.

Abstract

The simple and cost-efficient preparation of high-performance nitrogen-doped carbon aerogel (N-CA) for supercapacitors and other applications is still a big challenge. In this work, we have presented a facile strategy to synthesize hierarchically porous N-CA, which is based on solvothermal polymerization of phenol and formaldehyde under hypersaline condition with ethylenediamine (EDA) functioning as both a catalyst and a nitrogen precursor. Benefited from the catalytic effect of EDA on the polymerization, the obtained N-CA has a predominant amount of micropores (micropore ratio: 52%) with large specific surface area (1201.1 m2&middot<br />g&minus<br />1). In addition, nitrogen doping brings N-CA enhanced wettability and reduced electrochemical impedance. Therefore, the N-CA electrode shows high specific capacitance (426 F&middot<br />1 at 1 A&middot<br />1 in 0.5 M H2SO4) and excellent cycling stability (104% capacitance retention after 10,000 cycles) in three-electrode systems. Besides, a high energy density of 32.42 Wh&middot<br />kg&minus<br />1 at 800 W&middot<br />1 can be achieved by symmetric supercapacitor based on the N-CA electrodes, showing its promising application for energy storage. Furthermore, N-CA also exhibits good capacity and long recyclability in the absorption of organic solvents.

Details

Language :
English
ISSN :
20794991
Database :
OpenAIRE
Journal :
Nanomaterials
Accession number :
edsair.doi.dedup.....841826fba3c363bda246c90587a9add0
Full Text :
https://doi.org/10.3390/nano9050771