Control of the interface graphitized/amorphous carbon of biomass-derived carbon microspheres for symmetric supercapacitors

Wang, Hongqiang; Li, Xin; Peng, Jiming; Cai, Yezheng; Jiang, Juantao; Li, Qingyu

doi:10.1039/d1na00262g

Cited by 19 publications

(5 citation statements)

References 32 publications

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“…14g). 168 In detail, potato starch was immersed in (NH 4 ) 2 HPO 3 solution, and then freeze-dried. The cleaned starch was heated to 250 °C, followed by heating to 450 °C to obtain potato starch-derived carbon microspheres.…”

Section: Designing High-performance Electrodes From Biomass-derived P...mentioning

confidence: 99%

“…N functional groups with electron-donor properties can provide electroactive centres to enhance the electrical conductivity, surface polarity, and wettability of carbon by creating defects and changing the valence orbital energy levels 167 Biomass-derived carbon microspheres via a flexible coupled catalysis-activation process: (g) schematic, (h) SEM and (i) HRTEM images of GASC-Fe, ( j) SEM and (k) HRTEM images of GASC-Ni, (l) XRD and (m) Raman spectra. 168 of the carbon atoms, thereby enhancing the electrochemical reactivity. 171 In carbon materials, N elements are generally classified into four different types: pyridine nitrogen (N-6), pyrrolic/pyridone nitrogen (N-5), quaternary nitrogen (N-Q), and pyridine nitrogen oxide (N-X).…”

Section: Phase/surface Modificationmentioning

confidence: 99%

“…14 (a) SEM, (b) TEM, (c) XRD, (d) Raman spectra, (e) specific capacitances and (f ) Ragone plots of biomass graphitized porous carbon materials by K 2 FeO 4 as an activator and catalyst 167. Biomass-derived carbon microspheres via a flexible coupled catalysis-activation process: (g) schematic, (h) SEM and (i) HRTEM images of GASC-Fe, ( j) SEM and (k) HRTEM images of GASC-Ni, (l) XRD and (m) Raman spectra 168.…”

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Biomass-derived porous carbon materials: synthesis, designing, and applications for supercapacitors

et al. 2022

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Section: Designing High-performance Electrodes From Biomass-derived P...mentioning

confidence: 99%

Section: Phase/surface Modificationmentioning

confidence: 99%

mentioning

confidence: 99%

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Biomass-derived porous carbon materials: synthesis, designing, and applications for supercapacitors

et al. 2022

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“…As it has been intensively demonstrated that degree of graphitization in carbon materials can effectively facilitate the charge and electrolytic ion transfer in supercapacitor application [53][54][55][56] , Raman spectroscopy was carried out to further study the graphitization degree of the prepared materials. The obtained results are shown in Fig.…”

Section: Samplementioning

confidence: 99%

Gamma-induced interconnected networks in microporous activated carbons from palm petiole under NaNO3 oxidizing environment towards high-performance electric double layer capacitors (EDLCs)

Benwannamas,

Sangtawesin,

Yilmaz

et al. 2023

Sci Rep

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Activated carbons (ACs) were developed from palm petiole via a new eco-friendly method composed of highly diluted H2SO4 hydrothermal carbonization and low-concentration KOH-activating pyrolysis followed by gamma-induced surface modification under NaNO3 oxidizing environment. The prepared graphitic carbons were subsequently used as an active material for supercapacitor electrodes. The physiochemical properties of the ACs were characterized using field emission scanning electron microscope–energy dispersive X-ray spectroscopy, N2 adsorption/desorption isotherms with Brunauer–Emmett–Teller surface area analysis, Fourier transform infrared spectroscopy, X-ray diffraction and Raman spectroscopy. The electrochemical performance of the fabricated electrodes was investigated by cyclic voltammetry, galvanostatic charge–discharge and electrochemical impedance spectroscopy. Even treated with extremely low H2SO4 concentration and small KOH:hydrochar ratio, the maximum SBET of 1365 m2 g−1 for an AC was obtained after gamma irradiation. This was attributed to radiation-induced interconnected network formation generating micropores within the material structure. The supercapacitor electrodes exhibited electric double-layer capacitance giving the highest specific capacitance of 309 F g−1 as well as excellent cycle stability within 10,000 cycles. The promising results strongly ensure high possibility of the eco-friendly method application in supercapacitor material production.

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“…Recently, Wang et al [11] used glucose as a carbon precursor, porous carbon spheres were obtained through a mild hydrothermal process with a specific capacitance of 260 F g −1 at a current density of 0.5 A g −1 . Wang et al [12]. prepared porous carbon microspheres using renewable potato starch as raw material, and its specific capacitance reached 198 F g −1 when the current density was 1 A g −1 .…”

Section: Introductionmentioning

confidence: 99%

Boron and nitrogen co-doped carbon nanospheres for supercapacitor electrode with excellent specific capacitance

Yang

Shao

2022

Nanotechnology

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At present, carbon materials derived from biomass precursors have many limitations in the field of energy storage. In this study, boron and nitrogen (B/N) co-doped carbon nanospheres were successfully prepared by emulsion crosslinking method using chitosan and boric acid as raw materials. After carbonization at high temperature, the carbon nanospheres can be facilely prepared with controllable particle size, showing excellent structural stability and sphericity. In addition, the heteroatoms co-doping endows the carbon nanospheres with large specific surface area, high graphitization degree and excellent electrochemical performance. Applying the carbon nanospheres for supercapacitors, the specific capacitance could reach up to 336.7 F g-1 at a current density of 1 A g-1. Even after 10,000 cycles, the Coulomb efficiency and specific capacitance still remained at 98.61% and 96.8%, respectively, demonstrating the great promise of B/N co-doped carbon nanospheres for the state-of-the-art supercapacitor electrodes applications.

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Control of the interface graphitized/amorphous carbon of biomass-derived carbon microspheres for symmetric supercapacitors

Abstract: Rational interface control of porous carbon electrode materials is of significance for efficient supercapacitors. Herein, biomass-derived carbon microspheres with highly graphitized porous surface and amorphous subsurface were well constructed via...

Cited by 19 publications

References 32 publications

Biomass-derived porous carbon materials: synthesis, designing, and applications for supercapacitors

Biomass-derived porous carbon materials: synthesis, designing, and applications for supercapacitors

Gamma-induced interconnected networks in microporous activated carbons from palm petiole under NaNO3 oxidizing environment towards high-performance electric double layer capacitors (EDLCs)

Boron and nitrogen co-doped carbon nanospheres for supercapacitor electrode with excellent specific capacitance

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