Smartly designed 3D N-doped mesoporous graphene for high-performance supercapacitor electrodes

Wang, Binghu; Qin, Yong; Tan, Wensheng; Tao, Yongxin; Kong, Yong

doi:10.1016/j.electacta.2017.04.120

Cited by 94 publications

(25 citation statements)

References 52 publications

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“…Recently, Wang et al used the amidated graphene oxide as precursor to fabricated the N-doped porous graphene materials. [84] The specific surface area of the graphene was 627 m 2 g −1 and the content of N atoms was up to 9.25%. In this study, the dominant configurations in the samples were pyrrolic-N and pyridinic-N, indicating that N atoms were more thermodynamically stable at the edges of the graphene lattice.…”

Section: Wwwadvsustainsyscommentioning

confidence: 98%

Progress of Nanostructured Electrode Materials for Supercapacitors

Jiang

Yadi

Nie

et al. 2017

Advanced Sustainable Systems

111

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Supercapacitors, as a type of energy storage system, bridge the power/energy gap between conventional capacitors and batteries due to attractive properties such as high power density, long cycle lifespan, and large temperature range. However, the low energy density of supercapacitors compared to lithium‐ion batteries has hindered their general application. In general, the electrochemical performance of supercapacitors is closely related to the structure of their electrode materials, electrolytes, and device design. The main materials used in electrochemical double‐layer capacitors (EDLCs) are carbon materials with various architectures. This is due to their high surface area, good electric conductivity, and intrinsic stability. In this review, recently reported carbon‐based nanostructured electrode materials with 0D, 1D, 2D, and 3D structures are systematically reviewed. The effect of nanostructuring on the properties of supercapacitors including specific capacitance, rate capability, and cycle stability is explored, the details of which may serve as a guide to electrode design for the next generation of EDLCs.

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Section: Wwwadvsustainsyscommentioning

confidence: 98%

Progress of Nanostructured Electrode Materials for Supercapacitors

Jiang

Yadi

Nie

et al. 2017

Advanced Sustainable Systems

111

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“…Rate capabilities of MG-X and MC (b), CV profiles of MG-X at the scan rate of 1 mV·s −1 (c), CV profiles of MG-3 at different scan rates (d), GCD curves at the current density of 0.033 A·g −1 (e), and rate capabilities (f) of MC-X. 6 Journal of Nanomaterials electrochemical performance with relatively high internal resistance, which is due to its high oxygen content [35]. Based on the GCD curves, the specific capacitances of MG-1, MG-3, and MG-5 calculated from (1) , respectively, and the variation tendency is consistent with that of S BET .…”

Section: Journal Of Nanomaterialsmentioning

confidence: 99%

“…Graphene, a single atomic layer of graphite consisting of sp 2 -hybridized carbon atoms in a honeycomb lattice [4], is particularly suitable for supercapacitor applications because of its excellent characteristics including high specific surface area and superb electronical conductivity [5]. However, graphene sheets easily suffer from unavoidable restacking owing to the strong π-π interactions between graphene layers during preparation and subsequent processing [1,6]. Consequently, some unique and excellent properties that individual graphene sheets possess such as high specific surface area and peculiar electron transport behaviors are significantly compromised or even unavailable in an assembly [7].…”

Section: Introductionmentioning

confidence: 99%

“…It was found that incorporating pores into the graphene architectures to fabricate porous graphene materials can provide a good solution to the issue of aggregation or sheet-to-sheet restacking [10,11]. In comparison with micropores and macropores, mesopores in graphene are more beneficial to enhance electrochemical performance of the corresponding electrodes by serving as an expressway for electrolyte ion diffusion and providing low resistances for charge transfer [6,12].…”

Section: Introductionmentioning

confidence: 99%

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Facile Synthesis of Mesoporous Graphene Materials from Potassium Humate for Supercapacitor Electrodes

Huang

Geng

Kang

et al. 2018

Journal of Nanomaterials

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Mesoporous graphene materials (MG-X) were prepared from potassium humate coupled with magnesium acetate. The freezedrying pretreatment and MgO particles not only prevent the agglomeration of graphene sheets and form mesopores but also help to reduce the oxygen content and enlarge the sp 2 carbon domain of MG-X. MG-X possess optimized characteristics including large specific surface area (>1100 m 2 ·g −1 ), high mesoporosity (~90%), and low oxygen content (~7%). When used as supercapacitor electrodes, MG-X demonstrate optimal electrochemical performances among all materials prepared here, such as high gravimetric capacitance (150 F·g −1 at high current density of 3.3 A·g −1) and enhanced rate capability with the capacitance retention of~80% from 0.041 to 3.3 A·g −1 . Moreover, MG-5 exhibits good cycling stability with a capacitance retention of 98.6% after 1000 cycles at 2.46 A·g −1 . This work provides a facile and efficient preparation method for mesoporous graphene materials used as supercapacitor electrodes.

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“…There are a number of method of nitrogen doping after synthesis of carbon materials such as (1) introducing nitrogen into a carbon material structure when oxidized materials are reduced through heating in ammonia atmosphere, (2) sintering of solids after drying of carbon materials that were immersed in a nitrogen compound, (3) injection of accelerated nitrogen ions into carbon materials, and (4) treatment of carbon materials with ammonia plasma …”

Section: Introductionmentioning

confidence: 99%

Nitrogen doping of carbon nanoballoons by radiofrequency magnetron plasma and evaluation of their oxygen reduction reaction activity

Takahashi

Harigai

Tanimoto

et al. 2019

Elect Comm in Japan

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Nitrogen‐doped carbon materials exhibit a catalytic activity, such as an oxygen reduction reaction (ORR). In this study, we performed nitrogen doping on a carbon nanoballoon (CNB), which is a nanometer‐sized carbon particle in the form of a hollow sphere made of graphite by radiofrequency (RF) magnetron plasma in a gas mixture of nitrogen and helium. Nitrogen‐doped CNBs (N‐doped CNBs) were prepared by different plasma irradiation conditions: the sample installation positions, input powers, and irradiation times. The samples were examined for chemical state by X‐ray photoelectron spectroscopy (XPS). Hydrodynamic voltammetry was used for the evaluation of the catalytic activity of a N‐doped CNB with a pyridinic N concentration of 0.4‐1.0 at.%. As a result, the onset potential was measured to be 0.13 V versus RHE (reversible hydrogen electrode), which was close to the previously reported data of highly oriented pyrolytic graphite (HOPG) with a pyridinic N concentration of 0.57 at.%, which was prepared by annealing under NH3.

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Smartly designed 3D N-doped mesoporous graphene for high-performance supercapacitor electrodes

Cited by 94 publications

References 52 publications

Progress of Nanostructured Electrode Materials for Supercapacitors

Progress of Nanostructured Electrode Materials for Supercapacitors

Facile Synthesis of Mesoporous Graphene Materials from Potassium Humate for Supercapacitor Electrodes

Nitrogen doping of carbon nanoballoons by radiofrequency magnetron plasma and evaluation of their oxygen reduction reaction activity

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