Nitrogen-doped mesoporous graphene with fine-tuned pore size in a few nanometer-scale for supercapacitor applications

Lee, Jihye; Kim, Hyun-Ju; Kim, Aran; Jung, Hyun

doi:10.1016/j.micromeso.2019.109794

Cited by 22 publications

(9 citation statements)

References 44 publications

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“…The C 1s spectrum of A-NPC-800 shown in Figure b can be decomposed into four peaks at 284.1, 284.8, 286.1, and 288.7 eV, which are CC, CN/C–P, C–O, and C–N/CO, respectively . The N 1s spectrum (Figure c) can be decomposed into four separate peaks, namely, pyridinic nitrogen (N-6, with 398.3 eV as the center), pyrrolic nitrogen (N-5, with 400 eV as the center), and oxidized nitrogen (N-X, with 404.3 eV). − According to previous reports, in alkaline aqueous electrolyte solutions, N-6 and N-5 at the edges of the graphite layer exert a pseudocapacitive effect, which is significant for enhancing the capacitive characteristics of porous carbon materials. − The P 2p spectrum of phosphorus can be decomposed into two peaks at 132.4 and 133.2 eV that correspond to P–C and P–O, respectively (Figure d), indicating the formation of phosphorous species . As previously reported, P–C can generate a lot of active sites .…”

Section: Resultsmentioning

confidence: 99%

N/P Codoped Carbon Materials with an Ultrahigh Specific Surface Area and Hierarchical Porous Structure Derived from Durian Peel for High-Performance Supercapacitors

Liu

et al. 2020

Energy Fuels

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Activated N/P codoped carbon (A-NPC) materials with ultrahigh specific surface areas (SSA) and hierarchical porous structures were synthesized by a green and cheap method to enhance the electrochemical performance of electrical double-layer capacitors. Waste durian peel was used as a carbon precursor, (NH4)2HPO4 as N and P sources, and KOH as an activator. The obtained porous carbon material had an ultrahigh SSA (3416 m2 g–1), a hierarchical porous structure (84 vol % micropores), and appropriate N (2.17 at. %) and P (0.48 at. %) doping amounts. Synergy among these characteristics enabled the A-NPC to exhibit exciting specific capacitance (383.4 F g–1 at 0.5 A g–1), ideal rate performance (255.6 F g–1 at 20 A g–1), and fantastic cyclic performance (98.3% capacitance retention after 10 000 cycles at 5 A g–1) in the three-electrode device. This material could provide an energy density of 25.3 W h kg–1 when the power density was 400.5 W kg–1, to all-solid-state symmetrical capacitors and presented good cycle performance with a cycle retention rate of 97.6% at 2 A g–1 after 5000 cycles. A-NPC has potential applications in the supercapacitor field given its excellent properties.

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Section: Resultsmentioning

confidence: 99%

N/P Codoped Carbon Materials with an Ultrahigh Specific Surface Area and Hierarchical Porous Structure Derived from Durian Peel for High-Performance Supercapacitors

Liu

et al. 2020

Energy Fuels

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“…It is interesting to note that the washing conditions of the composite gel during the synthesis strongly influenced the pore size control as well as the uniform distribution of pores, and the highest surface area was observed when NMG was washed with ethyl alcohol instead of water. 136 A novel method was recently introduced Lv et al to develop a lanthanum carbonate-nickel hydroxide composite with a hierarchical 3D graphene. Lattice-confined etching perovskite nanoparticles and a self-sacrificial graphene oxide self-assembly were utilized to create a 3D nestlike framework of lanthanum carbonate and flower-shaped rGO/Ni(OH) 2 as shown in Figure 17.…”

Section: D Graphene For Supercapacitorsmentioning

confidence: 99%

Section: D Graphene For Supercapacitorsmentioning

confidence: 99%

“…The as-prepared NMG showed a specific capacitance of 284 F/g at 0.1 A/g current density and 98% retention after 5000 cycles (Figure (ii)). It is interesting to note that the washing conditions of the composite gel during the synthesis strongly influenced the pore size control as well as the uniform distribution of pores, and the highest surface area was observed when NMG was washed with ethyl alcohol instead of water …”

Section: D Graphene For Supercapacitorsmentioning

confidence: 99%

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Recent Trends in the Use of Three-Dimensional Graphene Structures for Supercapacitors

Zaka

Hayat

Mittal

2021

ACS Appl. Electron. Mater.

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With the global market of conventional fuels in turmoil, researchers are looking for alternative sources of energy which should be clean, pollution-free, and superior in performance. Supercapacitors are among a few promising alternatives due to their easy preparation, environmentally friendly nature, and vast potential for research and growth. In recent years, 3D graphene has emerged as a valuable material for several applications. The successful utilization of 3D graphene in supercapacitors opened doors of exploration to scientists. Graphene, either solely or combined with other materials, is used extensively in supercapacitors as electrodes. However, the performance of supercapacitors is dependent on several factors. Performance analysis and the overview of these factors are always vital for future studies. This review provides insight into the most recent developments made in utilizing 3D graphene for supercapacitors along with addressing the above-mentioned issues.

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“…14 Compared to the CDC, larger spacing at about 5-10 nm among Mn 3 O 4 nanoflakes grown on reduced graphene oxide improves both structural stability and capacitance due to extended diffusion mechanism of ions. 15 Furthermore, a study 16 aiming to tune pore size of nitrogen-doped graphene refers a suitable range of pore length, 4.4-11.2 nm, offering a capacitance 284 F/g. An ordered meso structure with porosity 4.1 nm in size and 1.14 cm 3 /g specific pore volume possesses a capacitance, 252 F/g and leads to a better diffusion tunneling.…”

Section: Introductionmentioning

confidence: 99%

Not So Far, Not So Close: A Configurational Study of a Carbon Nanotube Bundle for Better Dielectric Phenomena

Orhan

2020

Bulletin Korean Chem Soc

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Size of pores or spacing among nano-protrusions such as nanotubes on an electrode surface greatly affects diffusive, viscous, and dielectric phenomena of electrolyte through openings. In this study, a configurational study was conducted to examine the effect of spacing among the single-walled carbon nanotubes on dielectric and viscous phenomena. Behavior of a polar liquid, acetonitrile, was investigated by molecular simulations at two low densities. Results show that viscosity of the liquid is greatly enhanced by interaction with closely packed tubes' bundle. In conjunction with such increase in viscosity, relaxation of dipoles takes longer times inside such closed packed bundle. Most importantly, spacing among the tubes with diameter D should be at about D/2 in a direction for better dielectric phenomena.

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Nitrogen-doped mesoporous graphene with fine-tuned pore size in a few nanometer-scale for supercapacitor applications

Cited by 22 publications

References 44 publications

N/P Codoped Carbon Materials with an Ultrahigh Specific Surface Area and Hierarchical Porous Structure Derived from Durian Peel for High-Performance Supercapacitors

N/P Codoped Carbon Materials with an Ultrahigh Specific Surface Area and Hierarchical Porous Structure Derived from Durian Peel for High-Performance Supercapacitors

Recent Trends in the Use of Three-Dimensional Graphene Structures for Supercapacitors

Not So Far, Not So Close: A Configurational Study of a Carbon Nanotube Bundle for Better Dielectric Phenomena

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