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One-step synthesis of nitrogen, sulfur co-doped interconnected porous carbon derived from methylene blue for high-performance supercapacitors
- Source :
- Diamond and Related Materials. 109:108028
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- In this work, nitrogen (N), sulfur (S) co-doped porous carbon nanoplate (A-MBCP) is successfully prepared from methylene blue (MB) by facile one-step carbonization and activation strategy. It is an efficient method to protect the environment and meet industrialization production. The obtained carbon nanoplate exhibits in-situ doping of N, S, high specific surface area (560.46 m2 g−1), interconnected and hierarchical porous morphology, together with large interlayer spacing. This unique and complex micromorphology endows the A-MBCP electrode with superior electrochemical performance, including ultra-high specific capacitance of 302 F g−1 at 0.5 A g−1 and excellent capacitance retention of 77.82% at 10 A g−1 in 6 M KOH electrolyte. Furthermore, the assembled A-MBCP//A-MBCP symmetric supercapacitor displays outstanding energy density of 25 Wh kg−1 and power density of 8000 W kg−1 using Na2SO4 as electrolyte. Also, the high capacitance retention of 98.6% and coulombic efficiency of 97.9% are achieved for the supercapacitor after 3000 cycles at 2 A g−1 in KOH electrolyte, implying its favorable electrochemical stability and charge/discharge reversibility. This novel preparation of high-performance supercapacitors from MB may further inspire the development of other carbon materials with heteroatoms doping applied in the energy storage application.
- Subjects :
- Supercapacitor
Materials science
Carbonization
Mechanical Engineering
Heteroatom
chemistry.chemical_element
02 engineering and technology
General Chemistry
Electrolyte
010402 general chemistry
021001 nanoscience & nanotechnology
Electrochemistry
01 natural sciences
Capacitance
0104 chemical sciences
Electronic, Optical and Magnetic Materials
chemistry
Chemical engineering
Materials Chemistry
Electrical and Electronic Engineering
0210 nano-technology
Carbon
Faraday efficiency
Subjects
Details
- ISSN :
- 09259635
- Volume :
- 109
- Database :
- OpenAIRE
- Journal :
- Diamond and Related Materials
- Accession number :
- edsair.doi...........e2bcb23d3515baeb6c7e9c501b045f4b