Hierarchically Porous N-Doped Carbon Nanosheets Derived From Grapefruit Peels for High-Performance Supercapacitors

Wang, Ying‐Ying; Hou, Bao‐Hua; Lü, Hong‐Yan; Lü, Changli; Wu, Xing‐Long

doi:10.1002/slct.201600133

Cited by 51 publications

(30 citation statements)

References 48 publications

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“…Supercapacitors are electrical-energy-storage devices that have recently attracted considerable interest due to their long life cycle, fast charge/discharge capability, and high power [1][2][3][4]. Based on the working principles, supercapacitors can be classified into two major types: pseudocapacitors and electrical double layer capacitors (EDLCs).…”

Section: Introductionmentioning

confidence: 99%

“…Raman spectra of GO, GO-PPY-N 2 , GO-PPY-O 2 and GO-PPY-CH4 . Two distinct peaks of D-band and G-band located at 1350 cm -1 and 1580 cm -1 , respectively, were observed, which were related to A 1g mode breathing vibrations of six member sp 2 carbon rings, and the first order scattering of the stretching vibration mode E 2g of the sp 2 carbon domain[43,44], respectively.…”

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confidence: 99%

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Low-temperature plasma exfoliated n-doped graphene for symmetrical electrode supercapacitors

Wang

et al. 2017

Nano Energy

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Radio frequency (RF) dielectric barrier discharge plasma was used to exfoliate graphite oxide (GO) into graphene. The GO was synthesized from a modified Hummers method. The exfoliation occurred swiftly once the RF power and gas pressure reached a level that enabled sufficient energy transfer from the plasma to the GO. X-ray diffraction (XRD) and transmission electron microscopy (TEM) confirmed that graphene or carbon nanosheets were successfully prepared. The plasma exfoliation mechanism was revealed based on the microstructure characterization and optical emission spectroscopy, which indicated that oxygen was released at the moment of exfoliation. Inspired by the success of GO exfoliation, N-doping was realized by treating polypyrrole-modified GO with plasmas. The N concentration in the resulted graphene depended strongly on the plasma gas. Of the gases studied, CH 4 treated polypyrrole-modified

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Section: Introductionmentioning

confidence: 99%

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confidence: 99%

Low-temperature plasma exfoliated n-doped graphene for symmetrical electrode supercapacitors

Wang

et al. 2017

Nano Energy

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“…The cumulative pore volume stop to increase when the pore width is larger than 2 nm and the pore volume of SAC‐4 and SAC‐6 improve obviously among the pore width at 2∼5 nm. KOH was used for the activation of precursor and the reaction mechanism is given as follows:

true 4 KOH + normalC \to normalK_{2} CO_{3} + normalK_{2} normalO + 2 H_{2}

true normalK_{2} CO_{3} + 2 C \to 2 normalK + 3 CO

true normalK_{2} normalO + normalC \to 2 normalK + CO

…”

Section: Resultsmentioning

confidence: 99%

“…Recently, more efforts have been devoted to the use of precursors from biomass wastes to produce porous carbons . Many studies have reported on the preparation of adsorbents and storage materials with porous structures using various biomass sources including coconut cassava peel waste, sugarcane bagasse, shell, waste coffee beans, cocoa pod husk, rice straw, olive stones, bamboo, and sawdust .…”

Section: Introductionmentioning

confidence: 99%

N‐doping Hierarchical Porosity Carbon from Biowaste for High‐Rate Supercapacitive Application

Zhao

Zhang

et al. 2017

ChemistrySelect

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In this work, nitrogen‐doped carbon materials with hierarchical porosity were prepared from biowaste of soybean curd residue (SCR) by KOH activation. The morphology, structure and textural properties of the carbon materials are investigated by scanning electron microscopy, transmission electron microscopy, X‐ray photoelectron spectroscopy, X‐ray diffraction, Raman spectroscopy, and N2 absorption‐desorption isotherms, respectively. The products exhibit high specific surface area of 3431 m2 g−1, high nitrogen doping level, outstanding charge storage capacity of 282 F g−1 at the current density of 0.5 A g−1 and good electrochemical stability over 10000 cycles. Moreover, it still retains 200 F g−1 (71 % of its capacitance at 0.5 A g−1) at 20 A g−1. The findings pave the way for improving charge storage capacity of supercapacitors based on activated carbon and provide a new method to transfer biowaste to effective electrode material.

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“…developed hierarchical porous N‐doped carbon nanosheets by using natural silk as carbon sources grapefruit peels, ginkgo leaves and spider silk …”

Section: Introductionmentioning

confidence: 99%

Co‐N‐C Catalysts Synthesized viaPyrolyzing the Ionic Liquids Solution Dissolved with Casein and Cobalt Porphyrin for Ethylbenzene Oxidation

et al. 2017

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In order to enhance the dispersion of active centers and decrease the size of metal particles, cobalt-coordinated Ndoped carbon (Co-NÀC)with small particle size (3~8 nm) were synthesized via pyrolyzing a special homogenous solution, namely the mixture of casein and cobalt porphyrin dissolved in 1-butyl-3-methyllimidazolium chloride ionic liquid. And the catalysts have been characterized by N 2 adsorption-desorption isotherm, XRD, TEM, XPS and so on. The asprepared Co-NÀC exhibiteda remarkable catalytic performance (conversion of ethylbenzene reached 35.3 %) with molecular oxygen as oxidant under solvent-free conditions.Moreover, the best Co-NÀC showed superior cycling stability over 5 cycles. Those may be attributed to the well-dispersed acitve sites with small particle size and powerful CoÀN bond which effectively prevents metal particles from aggregation.

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Hierarchically Porous N-Doped Carbon Nanosheets Derived From Grapefruit Peels for High-Performance Supercapacitors

Cited by 51 publications

References 48 publications

Low-temperature plasma exfoliated n-doped graphene for symmetrical electrode supercapacitors

Low-temperature plasma exfoliated n-doped graphene for symmetrical electrode supercapacitors

N‐doping Hierarchical Porosity Carbon from Biowaste for High‐Rate Supercapacitive Application

Co‐N‐C Catalysts Synthesized viaPyrolyzing the Ionic Liquids Solution Dissolved with Casein and Cobalt Porphyrin for Ethylbenzene Oxidation

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