Nitrogen-doped porous carbon derived from ginkgo leaves with remarkable supercapacitance performance

Wang, Yangling; Shao, Chunfeng; Qiu, Shujun; Zhu, Ying; Qin, Mei; Meng, Yuxiang; Wang, Yu; Chu, Hailiang; Zou, Yongjin; Xiang, Cuili; Zeng, Ju‐Lan; Cao, Zhaoxia; Xu, Fen; Sun, Lin

doi:10.1016/j.diamond.2019.107475

Cited by 56 publications

(17 citation statements)

References 50 publications

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“…As shown in Figure 5C, the specific capacitances of the PCM‐2 symmetric supercapacitor are 62.5, 60.5, 55.2, 51.9, 46.3, and 32.6 F g −1 at 0.5, 1, 2, 3, 5, and 10 A g −1 , respectively, revealing good capacitance retention. Moreover, the Ragone plot (Figure 5D) of the PCM‐2 symmetric supercapacitor shows that the energy densities can reach 8.5 W kg −1 at a power density of 122.1 and 3.4 Wh kg −1 at a power density of 1875.0 W kg −1 , which are comparable to those of previously reported carbon‐based symmetric supercapacitor in alkaline medium 11,50‐55 …”

Section: Resultssupporting

confidence: 82%

“…Moreover, the Ragone plot (Figure 5D) of the PCM-2 symmetric supercapacitor shows that the energy densities can reach 8.5 W kg −1 at a power density of 122.1 and 3.4 Wh kg −1 at a power density of 1875.0 W kg −1 , which are comparable to those of previously reported carbon-based symmetric supercapacitor in alkaline medium. 11,[50][51][52][53][54][55]…”

Section: Electrochemical Performancesmentioning

confidence: 99%

“…into porous carbon framework is supposed to be able to enhance the electrochemical activity of porous carbon by optimizing band gap and/or transforming surface characteristics. [11][12][13] Additionally, some studies pointed out that Ncontaining functional groups could enhance the surface hydrophilicity and electrical conductivity of carbon matrix. 14,15 Meanwhile, the introduction of nitrogen dopants could trigger pseudocapacitance through the superficial faradic redox reactions with the electrolyte, thus resulting in a higher specific capacitance.…”

Section: Introductionmentioning

confidence: 99%

“…Recently a large number of literature reported that incorporating heteroatoms (B, N, O, P, S, etc.) into porous carbon framework is supposed to be able to enhance the electrochemical activity of porous carbon by optimizing band gap and/or transforming surface characteristics 11–13 . Additionally, some studies pointed out that N‐containing functional groups could enhance the surface hydrophilicity and electrical conductivity of carbon matrix 14,15 .…”

Section: Introductionmentioning

confidence: 99%

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Rambutan‐like hierarchically porous carbon microsphere as electrode material for high‐performance supercapacitors

Shao

Qiu

et al. 2020

Carbon Energy

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Used as high-performance electrodes, both structural and compositional alterations of carbon materials play very important roles in energy conversion/storage devices. Especially in supercapacitors, hierarchical pores and heteroatom doping in carbon materials are indispensable. Here the rambutan-like hierarchically porous carbon microspheres (PCMs) have been constructed via a hydrothermal treatment, followed by carbonization/activation. The hierarchically porous microstructure is composed of three-dimensional porous carbon networks, which give rise to a large surface area. Moreover, N and O functional groups are introduced in the as-prepared samples, which could generate the extra pseudocapacitance. Benefitting from the interconnected hierarchical and open structure, PCM exhibits outstanding capacitive performance, for example, superior specific capacitance and rate capability (397 and 288 F g −1 at 0.5 and 20 A g −1 , respectively), as well as long cycling stability (about 95% capacitance retention after 10,000 cycles). These encouraging results may pave an efficient way to fabricate advanced supercapacitors in the future.

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Section: Resultssupporting

confidence: 82%

Section: Electrochemical Performancesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Rambutan‐like hierarchically porous carbon microsphere as electrode material for high‐performance supercapacitors

Shao

Qiu

et al. 2020

Carbon Energy

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“…When the relative pressure P/P o > 0.9, the amount of nitrogen adsorption increased significantly, indicating the existence of macropores. Most of the pores originated from hydrothermal carbon and KOH activation, which provided more active sites and gave the material better electrochemical performance [ 32 ]. With the increase of KOH, the specific surface area improved from 25.3 to 2270.6 m 2 g −1 .…”

Section: Resultsmentioning

confidence: 99%

Research on High-Value Utilization of Carbon Derived from Tobacco Waste in Supercapacitors

et al. 2021

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Large quantities of tobacco stalks residues are generated and discarded as crop waste or combusted directly every year. Thus, we need to find an appropriate way to dispose of this type of waste and recycle it. The conversion of biomass waste into electrode materials for supercapacitors is entirely in line with the concept of sustainability and green. In this paper, tobacco-stalk-based, porous activated carbon (TC) was successfully synthesized by high-temperature and high-pressure hydrothermal pre-carbonization and KOH activation. The synthesized TC had a high pore volume and a large surface area of 1875.5 m2 g−1, in which there were many mesopores and interconnected micro-/macropores. The electrochemical test demonstrated that TC-1 could reach a high specific capacitance of up to 356.4 F g−1 at a current density of 0.5 A g−1, which was carried in 6M KOH. Additionally, a symmetrical supercapacitor device was fabricated by using TC-1 as the electrode, which delivered a high energy density up to 10.4 Wh kg−1 at a power density of 300 W kg−1, and excellent long-term cycling stability (92.8% of the initial capacitance retention rate after 5000 cycles). Therefore, TC-1 is considered to be a promising candidate for high-performance supercapacitor electrode materials and is a good choice for converting tobacco biomass waste into a resource.

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Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

Cui

Qiu

et al. 2021

Advanced Sustainable Systems

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Catalysts with high activity play an indispensable role in ammonia‐borane (AB) hydrolysis for hydrogen production. Supported catalysts are always used because proper support can effectively prevent metal particle agglomeration. In addition, the interaction between support and metal species can further enhance the catalytic activity. Herein, cobalt‐embedded porous carbon with polyhedral structure (CoPCP) is successfully synthesized by one‐step carbonization of a core‐shell structured ZIF‐8@ZIF‐67 composite. As support, Ru nanoparticles are loaded on CoPCP by in situ reduction to obtain Ru/CoPCP catalysts with a special hollow structure, effectively preventing Ru nanoparticles from agglomeration. Moreover, the existence of synergistic effect between Co metal and Ru nanoparticles in Ru/CoPCP catalyst is confirmed by a series of well‐designed control experiments. Both these factors endow the Ru/CoPCP catalyst with high activity and decent stability toward AB hydrolysis. A low activation energy (Ea = 31.25 kJ mol–1) and a high catalytic performance (turnover frequency = 243.4 molH2 molRu–1 min–1) are simultaneously achieved for Ru1/CoPCP‐1000 even with a low amount of Ru (1.88 wt%). This work represents a promising method to prepare the high‐activity catalysts with low content of noble metals for diverse applications in heterogeneous catalysis.

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Nitrogen-doped porous carbon derived from ginkgo leaves with remarkable supercapacitance performance

Cited by 56 publications

References 50 publications

Rambutan‐like hierarchically porous carbon microsphere as electrode material for high‐performance supercapacitors

Rambutan‐like hierarchically porous carbon microsphere as electrode material for high‐performance supercapacitors

Research on High-Value Utilization of Carbon Derived from Tobacco Waste in Supercapacitors

Ruthenium Supported on Cobalt‐Embedded Porous Carbon with Hollow Structure as Efficient Catalysts toward Ammonia‐Borane Hydrolysis for Hydrogen Production

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