Meso/microporous nitrogen-containing carbon nanofibers with enhanced electrochemical capacitance performances

Wang, Honghu; Liu, Jinghao; Zhang, Kun; Peng, Hongrui; Li, Guicun

doi:10.1016/j.synthmet.2015.02.013

Cited by 8 publications

(10 citation statements)

References 31 publications

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“…There are several points that need to be outlined. First, the specific capacitance decreases with the increase of the current density, probably because of the remarkable gain of the diffusion limitation inside pore channels (Wang et al, 2015). The rate dependence seems similar for both lithium and sodium electrolytes when a broad voltage window is used (between 0.1 and 3.0 V).…”

Section: Resultsmentioning

confidence: 95%

Biomass-Derived Carbonaceous Materials to Achieve High-Energy-Density Supercapacitors

et al. 2021

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Biomass-derived carbonaceous materials are considered as one of the most perspective electrodes for symmetric supercapacitors working with alkaline-basic electrolytes. However, they still exhibit lower energy density. Herein, we demonstrate the capacitance performance of the commercial carbon product (YP-50F, “Kuraray Europe” GmbH), obtained from coconuts, in symmetric supercapacitors by using lithium and sodium organic electrolytes. It is found that YP-50F delivers higher energy density when lithium electrolyte containing LiBF4 salt is employed. The sodium electrolyte with NaPF6 salt is less aggressive toward YP-50F than that of LiPF6 salt, as a result of which a good capacitance performance is observed in the sodium electrolyte. The contributions of surface functional groups of YP-50F, as well as its compatibility with non-aqueous lithium and sodium electrolyte, are discussed on the basis of post-mortem scanning electron microscopy (SEM)/energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) data analyses. The obtained correlations could be of significance in order to design sustainable supercapacitors with high energy density.

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Section: Resultsmentioning

confidence: 95%

Biomass-Derived Carbonaceous Materials to Achieve High-Energy-Density Supercapacitors

et al. 2021

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“…Both HPGC and HPC show one broad peak at 24.7 • due to amorphous carbon structures. Two peaks of HPGC at 25.6 • and 42.7 • correspond to (002) and (101) planes of graphitized carbon, respectively [2]. According to Bragg's equation, the d 002 value for HPGC material is calculated to be 0.345 nm, which is smaller than that of HPC (0.36 nm).…”

Section: Resultsmentioning

confidence: 98%

“…>C=NH + 2 e − + 2 H + ↔ >CH-NH2 (1) >C-NHOH + 2 e − + 2 H + ↔ >C-NH2 + H2O (2) >C=O + H + + e − ↔ >C-OH (carbonyl, basic) (3) >C=O + e − ↔ >C-O -(quinone, basic) O1s spectrum can be fitted into three peaks corresponding to quinone C=O (530.6 ± 0.3 eV), C-O-C (532.9 ± 0.3 eV), and O=C-OH groups (533.7 ± 0.3 eV). However, the high-resolution O 1s spectrum of HPC exhibits phenol C-OH (531.8 ± 0.3 eV), C-O-C, and O=C-OH groups (Figure 6e) [19].…”

Section: Resultsmentioning

confidence: 99%

“…>C-NHOH + 2 e − + 2 H + ↔ >C-NH2 + H2O (2) >C=O + H + + e − ↔ >C-OH (carbonyl, basic) (3) >C=O + e − ↔ >C-O -(quinone, basic) Compared with the HPC electrode, the HPGC electrode possesses a larger enclosed area at various scan rates, indicating a higher specific capacitance (Figure 8a,b). Figure 8c and d show the CV curves of two samples at scan rates from 5 to 100 mV s -1 in a voltage of −0.2-0.8V.…”

Section: Resultsmentioning

confidence: 99%

“…As a novel type of energy-storage device, supercapacitors have recently received considerable attention since they are essential components of high-rate electric devices in hybrid vehicles [1][2][3][4]. Activated carbons with a large specific surface area (SSA) over 2000 m 2 g −1 , one type of electrode materials for supercapacitors, have achieved commercial success in supercapacitor devices due to their low cost [5][6][7].…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen- and Oxygen-Containing Three-Dimensional Hierarchical Porous Graphitic Carbon for Advanced Supercapacitor

et al. 2020

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Three-dimensional hierarchical porous graphitic carbon (HPGC) were synthesized via one-step carbonization-activation and a catalytic strategy. The method can not only improve the graphitization degree of carbon materials, but also offer plentiful interfaces for charge accumulation and short paths for ion/electron transport. Polypyrrole, potassium hydroxide, and nickel acetate were used as the carbon precursors, activating agent, and catalyst, respectively. The retraction and dissolution of Ni caused the change of pore size in the material and led to the interconnected micro/nano holes. Nickel acetate played a significant role in enhancing the electrical conductivity, introducing pseudocapacitance, and promoting ion diffusion. In the supercapacitor, HPGC electrode exhibited a remarkable specific capacitance of 336.3 F g−1 under 0.5 A g−1 current density and showed high rate capability, even with large current densities applied (up to 50 A g−1). Moreover, HPGC showed optimal cycling stability with 97.4% capacitance retention followed by 3000 charge-discharge cycles. The excellent electrochemical performances coupled with a facile large-scale synthesis procedure make HPGC a promising alternative for supercapacitors.

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Biomass-derived activated carbon materials with plentiful heteroatoms for high-performance electrochemical capacitor electrodes

Zhou

Yang

2016

Journal of Energy Chemistry

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Meso/microporous nitrogen-containing carbon nanofibers with enhanced electrochemical capacitance performances

Cited by 8 publications

References 31 publications

Biomass-Derived Carbonaceous Materials to Achieve High-Energy-Density Supercapacitors

Biomass-Derived Carbonaceous Materials to Achieve High-Energy-Density Supercapacitors

Nitrogen- and Oxygen-Containing Three-Dimensional Hierarchical Porous Graphitic Carbon for Advanced Supercapacitor

Biomass-derived activated carbon materials with plentiful heteroatoms for high-performance electrochemical capacitor electrodes

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