Sugar beet pulp derived oxygen-rich porous carbons for supercapacitor applications

Gür, Emre; Semerci, Tuğçe Günay; Semerci, Fatih

doi:10.1016/j.est.2022.104363

Cited by 46 publications

(7 citation statements)

References 95 publications

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“…The N 2 adsorption–desorption isotherms and corresponding PSD calculated by the NLDFT of NHPC- x are shown in Figure a,c. All the samples show type-I isotherm with a steep increase of adsorption amount at low relative pressure ( P / P 0 < 0.1) and gradually increase until P / P 0 is close to 0.4, which indicates that NHPC- x has a hierarchical porous structure with multimodal pore sizes from micropores to mesopores. , The PSD curves in Figure c confirm that the micropores are mainly centered at 0.54, 0.94, and 1.22 nm, while the mesopores are mostly centered between 2 and 4 nm. No other macropores are observed in all cases, which is consistent with the SEM and TEM observations.…”

Section: Results and Discussionmentioning

confidence: 76%

Boosting Adsorption Isosteric Heat for Improved Gravimetric and Volumetric Hydrogen Uptake in Porous Carbon by N-Doping

Gao,

Hu,

Mao

et al. 2023

J. Phys. Chem. C

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Section: Results and Discussionmentioning

confidence: 76%

Boosting Adsorption Isosteric Heat for Improved Gravimetric and Volumetric Hydrogen Uptake in Porous Carbon by N-Doping

Gao,

Hu,

Mao

et al. 2023

J. Phys. Chem. C

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“…The amount of oxygen‐containing SFGs is twice as high in the CChK‐Bp sample, which is known to provide enhanced wettability and therefore successful accessibility of electrolyte ions during SC charge/discharge cycling. [ 18 ] The P2 p spectrum (Figure 3f) of ChP‐Bp is described by four peaks including the peak at 133 eV that corresponds to phosphorus chemically bonded to carbon (CPC bond). [ 45 ] This result confirms the incorporation of phosphorus atoms into the carbon structure during thermochemical conversion.…”

Section: Resultsmentioning

confidence: 99%

“…[ 10,13 ] Traditionally, beet pulp is used for feed and used as a source of food fibers, [ 12 ] and the recent increased interest in the development of value‐added products from beet pulp has stimulated the search for new processing areas, among which is the creation of a porous framework for composite materials for temperature control of buildings, [ 14 ] biochar and pyrolysis gas, [ 15 ] hydrochar, [ 16 ] and three‐dimensionally hierarchical porous carbons. [ 17,18 ]…”

Section: Introductionmentioning

confidence: 99%

“…framework for composite materials for temperature control of buildings, [14] biochar and pyrolysis gas, [15] hydrochar, [16] and three-dimensionally hierarchical porous carbons. [17,18] Sustainability also implies shifting toward clean and resourcesaving energy, which includes modern electrochemical energy conversion and storage systems with a low carbon footprint, including proton-exchange membrane fuel cells (PEM FCs) and supercapacitors (SCs). [19] SCs bridge the gap between traditional capacitors, which provide very high power density but low energy density, and lithiumion batteries, which provide high energy density but low-power density.…”

Section: Introductionmentioning

confidence: 99%

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Tuning Sugar Biomass Waste Conversion for the Preparation of Carbon Materials for Supercapacitors and Catalysts for Oxygen Reduction

et al. 2022

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Agriculture is the most massive material circulation activity of humans, with significant annual volumes of production as well as substantial amounts of waste. Transforming agricultural wastes into high‐value‐added products is the key to sustainable development with efficient usage of renewable resources. The present study demonstrates the fine‐tuning of the sugar beet pulp processing to access two types of materials for cutting edge applications—supercapacitors and fuel cells. Alkaline fine‐tuning results in N,O‐doped carbon material (CM) with an advantageous combination of surface area and morphology that allows to achieve high specific capacitance (308 F g−1), and excellent stability (>10 000 charge/discharge cycles). Not limited to the CM preparation and characterization, a real device is created in the present study to demonstrate the efficient usage of the carbon electrode in the form of the assembled coin cell. Acidic fine‐tuning, in contrast, yields a methodology for P,N,O‐doped material and optimizes to form active sites with electrocatalytic activity in the oxygen reduction reaction that is used for electricity production in proton‐exchange membrane fuel cells. The developed approach demonstrates the tuning of functional properties and morphology of CMs under experimentally simple conditions using conventional reagents (KOH and H3PO4) and opens up new directions in the circular biomass usage projects.

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“…The oxygen species could improve the material wettability, enhance the electrode/electrolyte interaction, and provide additional redox reaction, leading to high performance supercapacitors. [28][29] To better understand nitrogen-containing functional groups in these carbon materials, N 1s XPS spectra are deconvoluted into individual component peaks. As shown in Figure 6, three peaks at 398 eV, 400 eV, and 401 eV are identified, corresponding to pyridinic nitrogen (N-6), pyrrolic nitrogen (N-5), and graphitic nitrogen (NÀ Q), respectively.…”

Section: Elemental Compositionmentioning

confidence: 99%

Porous Carbons Prepared from Polyacrylonitrile Doped with Graphitic Carbon Nitride or Melamine for Supercapacitor Applications

Fu,

Li,

Yan

et al. 2023

ChemistrySelect

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Melamine and graphitic carbon nitride (g‐C3N4) obtained by thermal condensation of melamine were doped in polyacrylonitrile (PAN) films. Nitrogen‐doped porous carbons were then prepared by pyrolysis of the composite films. Though all the porous carbons had a high nitrogen content of at least 10 %, g‐C3N4 was more efficient than melamine in nitrogen doping. The nitrogen content was elevated with the increase of the amount of each dopant, the highest value of 19.0 % was achieved by g‐3 (porous carbon obtained from the PAN/g‐C3N4 composite film with a mass ratio of 3). Amongst the nitrogen functionalities, pyridinic‐N and pyrrolic‐N held a percentage of at least 80 %. Compared with the carbon materials obtained from melamine doped PAN films, those from g‐C3N4 doped ones exhibited larger surface area and average pore size, and higher pore volume. The difference mainly resulted from the thermostability and size of the dopants. The g‐C3N4 doped materials thus presented more excellent electrochemical properties. The specific capacitance of g‐3 electrode was 135.3 F/g at a current density of 0.5 A/g. Rather than melamine, g‐C3N4 could improve the chemical composition and textural properties of the carbon materials, thus enhancing their supercapacitor performance.

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Sugar beet pulp derived oxygen-rich porous carbons for supercapacitor applications

Cited by 46 publications

References 95 publications

Boosting Adsorption Isosteric Heat for Improved Gravimetric and Volumetric Hydrogen Uptake in Porous Carbon by N-Doping

Boosting Adsorption Isosteric Heat for Improved Gravimetric and Volumetric Hydrogen Uptake in Porous Carbon by N-Doping

Tuning Sugar Biomass Waste Conversion for the Preparation of Carbon Materials for Supercapacitors and Catalysts for Oxygen Reduction

Porous Carbons Prepared from Polyacrylonitrile Doped with Graphitic Carbon Nitride or Melamine for Supercapacitor Applications

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