Inherent N,O-containing carbon frameworks as electrode materials for high-performance supercapacitors

Hu, Fangyuan; Wang, Jinyan; Hu, Shui; Li, Linfei; Wang, Gang; Qiu, Jieshan; Jian, Xigao

doi:10.1039/c6nr05146d

Cited by 48 publications

(27 citation statements)

References 74 publications

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“…Graphene, a two‐dimensional single‐atom‐layer carbon material with a high specific surface area as high as 2630 m 2 /g and good electrical conductivity induced by covalently bonded sp 2 carbon atoms, is regarded as one of the most attractive candidate electrode materials of supercapacitors. However, compared with other energy storage devices, graphene supercapacitors exhibit low specific capacitance …”

Section: Figurementioning

confidence: 99%

“…However, compared with other energy storage devices, graphene supercapacitors exhibit low specific capacitance. [10][11][12] Graphene oxide is a single-layer graphite oxide in which hydroxyl and epoxy groups are accommodated in large quantities on its basal plane while comparatively smaller amounts of carbonyl and carboxyl groups are accommodated on its edge. [13][14] Graphene oxide can be regarded as an intermediate of graphene preparation by the approach of oxidation-exfoliation-reduction of graphite, which is one of the most widely applied method for mass production of graphene owing to its low cost, high yield, and simple synthesis procedure.…”

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Density Functional Theory Calculations of the Quantum Capacitance of Graphene Oxide as a Supercapacitor Electrode

et al. 2018

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Graphene oxide has become an attractive electrode-material candidate for supercapacitors thanks to its higher specific capacitance compared to graphene. The quantum capacitance makes relative contributions to the specific capacitance, which is considered as the major limitation of graphene electrodes, while the quantum capacitance of graphene oxide is rarely concerned. This study explores the quantum capacitance of graphene oxide, which bears epoxy and hydroxyl groups on its basal plane, by employing density functional theory (DFT) calculations. The results demonstrate that the total density of states near the Fermi level is significantly enhanced by introducing oxygen-containing groups, which is beneficial for the improvement of the quantum capacitance. Moreover, the quantum capacitances of the graphene oxide with different concentrations of these two oxygen-containing groups are compared, revealing that more epoxy and hydroxyl groups result in a higher quantum capacitance. Notably, the hydroxyl concentration has a considerable effect on the capacitive behavior.

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Section: Figurementioning

confidence: 99%

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Density Functional Theory Calculations of the Quantum Capacitance of Graphene Oxide as a Supercapacitor Electrode

et al. 2018

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“…[45] 15 Me750 204.8 n.a. 0.1 mV s À 1 442 1 M 463 N at 0.34% [46] 16 PHCFs@550 378 2.7 0.1 A g À 1 1244 1 M 304 N at 6.3% [47] 17 CNB900 277 5.7 0.5 mV s À 1 518 1 M 535 N at 3.0% [48] 18 (NSMC)LH2 280 n.a. 1 A g À 1 1064 1 M 263 N at 4.0% [49] 19 1B-2CHI-WT 306 6-8 0.1 A g À 1 710 1 M 431 N at 8.2% [50] 20 BN-GAs 239 n.a.…”

Section: Supporting Information Summarymentioning

confidence: 99%

Nitrogen and Sulfur Doped Mesoporous Carbons, Prepared from Templating Silica, as Interesting Material for Supercapacitors

et al. 2017

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Highly accessible surface area and heteroatom-doping are desired properties for carbon electrode materials to be used in electrochemical supercapacitors. In this paper, nitrogen and sulfur doped carbon materials with wide mesopores (13-14 nm) were synthetized according to a hard template approach by pyrolysis of sucrose, 1,10-phenanthroline or dibenzothiophene as carbon, nitrogen-carbon or sulfur-carbon precursors, respectively. The morphology and dimension of mesopores were induced by sacrificial SiO2 nanoparticles (10-20 nm), which are removed at the end of synthesis by an etching solution to reveal a network of hemispherical pores. The interconnected pore structure was confirmed by scanning electron microscopy and transmission electron microscopy. X-ray photoemission spectroscopy and elemental analysis confirmed the presence of nitrogen and sulfur functional groups. The prepared materials were fully characterized by cyclic voltammetry, chronopotentiometry and electrochemical impedance spectroscopy in 0.5 M H2SO4. Notwithstanding the small surface (200 m2g-1) determined by BET method, the nitrogen doped mesoporous carbon showed high specific gravimetric (∼170 F g-1) and surface (∼835 F m-2) capacitances that are comparable to those of materials with much higher surface area (5-10-fold higher)

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“…[52] The slight deviation in the CV curves can be ascribed to the trace amount of oxygen functionality,which leads to abit of pseudocapacitance. [53][54][55] Obviously, PC-Zn presents the biggest CV areas and longest discharging times, which indicates that PC-Zn has the best supercapacitive performance. The supercapacitance was intensively studied by as eries of electrochemical measurements.…”

Section: Supercapacitive Propertiesmentioning

confidence: 99%

Six Isomorphous Window‐Beam MOFs: Explore the Effects of Metal Ions on MOF‐Derived Carbon for Supercapacitors

Yue

Duan

et al. 2018

Chemistry A European J

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Six isomorphous metal-organic frameworks (MOFs) with a 3D window-beam architecture have been synthesized from solvothermal reactions, and are named Zn, Cd, Ni, Co, Mn and Cu-MOF, respectively. The series of MOFs was utilized as precursors to synthesize MOF-derived carbon with different morphologies. Zn and Cd-MOFs lead to the derivation of porous carbons (PCs), which exhibit remarkable BET specific surface areas. For derivates of Ni, Co and Mn-MOFs, graphitized carbons (GCs) show some carbon graphitization, but their BET specific surface areas are relatively small. C-Cu has the smallest BET specific surface area, and there is no carbon graphitization. Therefore, the metal ion of the parent MOF exerts a crucial effect on the preparation of MOF-derived carbon, such as the pore-forming effect of Zn and Cd species, and catalytic graphitization of Ni, Co, and Mn species. The capacitances of MOF-derived carbon follow the sequence of PCs>GCs>C-Cu, which reveals that the specific surface area plays a dominant role in the capacitive performance of electrical double layer capacitors (EDLCs), and that the graphitization could improve the capacitance. Significantly, PC-Zn exhibits the best specific capacitance (138 F g at 0.5 Ag ), and excellent life cycle, which can be applied as an electrode material in supercapacitors.

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Inherent N,O-containing carbon frameworks as electrode materials for high-performance supercapacitors

Cited by 48 publications

References 74 publications

Density Functional Theory Calculations of the Quantum Capacitance of Graphene Oxide as a Supercapacitor Electrode

Density Functional Theory Calculations of the Quantum Capacitance of Graphene Oxide as a Supercapacitor Electrode

Nitrogen and Sulfur Doped Mesoporous Carbons, Prepared from Templating Silica, as Interesting Material for Supercapacitors

Six Isomorphous Window‐Beam MOFs: Explore the Effects of Metal Ions on MOF‐Derived Carbon for Supercapacitors

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