Nitrogen-containing microporous carbon nanospheres with improved capacitive properties
By F. Su, C. Poh, J. Chen, Guangwen Xu, Dan Wang, Qin Li, Jianyi Lin, Xiong Wen (David) Lou. 2011
821 citations recorded by the source corpus.
We report the largely improved electrochemical capacitance of polypyrrole-derived microporous carbon nanospheres (MCNs, 80–100 nm in diameter) containing nitrogen functional groups. We have investigated the electrochemical properties of precursor polypyrrole nanospheres (PNs, with a high N/C ratio and low surface area) and as-derived carbon nanospheres (CNs, with a moderate N/C ratio and low surface area) prepared by carbonizing PNs at different temperatures, and MCNs (with a low N/C ratio and high surface area) obtained by chemical activation of CNs. The samples are thoroughly characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), Raman spectroscopy, thermogravimetric analysis (TGA), nitrogen sorption, elemental analysis, and X-ray photoelectron spectroscopy (XPS). It is found that MCNs with a high surface area and N-doping species exhibit much better capacitive performance compared to the PNs and CNs, and commercial carbon blacks (XC-72 and BP2000) as well. The MCN sample gives a reversible specific capacitance of ∼240 F g−1 for 3000 cycles in aqueous media as a result of combined advantages of high electrochemical activity of doped heteroatoms (N and O) and accessible well-developed porosity, demonstrating the promising use in high-energy-density supercapacitors.
Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Polymers and Plastics
View Paper: https://www.semanticscholar.org/paper/dc1d40aab86ed12bcd819b76eac13a63fccf4cb0
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Citations in the corpus
- Nitrogen-doped ordered mesoporous carbons based on cyanamide as the dopant for supercapacitor (2015, background): “[34] Su F, Poh CK, Chen JS, Xu G, Wang D, Li Q, et al.”
- Capacitance and surface of carbons in supercapacitors (2017, background): “Materials derived from biomass wastes [58-60], melamine [61-65], polyaniline [66-71], polypyrrol [72] are able to reach surface-capacitance values ranging from 0.”