Nitrogen-doped porous carbons through KOH activation with superior performance in supercapacitors

Zhou, Min; Pu, Fan; Wang, Zhao; Guan, Shiyou

doi:10.1016/j.carbon.2013.10.079

Cited by 358 publications

(190 citation statements)

References 52 publications

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“…In the case of CAC, the semicircle was not observed despite the presence of oxygen groups (3 wt%) in its structure. The impedance in the middle frequency range provides information about ion-diffusion resistance in the porous structure of the ACs [38]. Despite having a slightly larger average micropore size (Table 1), CAC exhibits a higher diffusion resistance compared with N-ACs.…”

Section: Nch1mentioning

confidence: 99%

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

et al. 2016

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Nitrogen-containing activated carbons were prepared from chitosan, a widely available and inexpensive biopolysaccharide, by a simple procedure and tested as electrode material in supercapacitors. The physical activation of chitosan chars with CO 2 led to carbons with a very high nitrogen content (up to 5.4 wt%) and moderate surface areas (1000-1100 m 2 g -1 ). Only chitosan-based activated carbons with a similar microporous structure were considered in this study to evaluate the effect of the nitrogen content and distribution on their electrochemical performance. The N-containing activated carbons were tested in two-and three-electrode supercapacitors using an aqueous electrolyte (1 M H 2 SO 4 ), and they exhibited superior surface capacitance (19.5 lF cm -2 ) and pseudocapacitance compared to a commercial activated carbon with a negligible nitrogen content and similar microporosity. The low oxygen content and the presence of stable quaternary nitrogen improved the charge propagation on the chitosan-based carbons, which was confirmed by the high capacity retention of 83 %. The chitosan-based carbons exhibited excellent cyclic stability and maintained 100 % of their capacitance after 5000 charge/discharge cycles at a current density of 1 A g -1 . These results demonstrate the suitability of chitosan-based carbons for application in energy storage systems.Electronic supplementary material The online version of this article

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Section: Nch1mentioning

confidence: 99%

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

et al. 2016

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“…The ratio of relative intensity of D band and G band (I D /I G ) is used to evaluate the degree of graphitization. The calculated I D /I G value of 1.07 reflects the existence of high defect sites in the carbon structure, leading to more active sites and higher conductivity of the NTC f mat [32][33][34].…”

Section: Resultsmentioning

confidence: 99%

Flexible N–doped TiO2/C ultrafine fiber mat and its photocatalytic activity under simulated sunlight

Wang

Lei

et al. 2014

Applied Surface Science

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“…Porous carbon-based materials have been widely investigated in different research fields including gas storage [1,2] and separation [3,4], electrocatalyst [5,6] and capacitor [7,8]. There are extensive approaches to obtain porous carbons such as template method [9], direct carbonization [10], sol-gel synthesis [7], physical and chemical activation [11], in which direct carbonization of precursor is a simple and effective method without any other additives [10].…”

Section: Introductionmentioning

confidence: 99%

Nitrogen-doped porous carbons from bipyridine-based metal-organic frameworks: Electrocatalysis for oxygen reduction reaction and Pt-catalyst support for methanol electrooxidation

Zhu

Cai

et al. 2014

Carbon

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Available online xxxx A B S T R A C TA novel pyridine-containing metal-organic framework (MOF), [Zn(bpdc)DMA]AEDMF, was first constructed by solvothermal reaction of 2,2 0 -bipyridine-5,5 0 -dicarboxylate (bpdc) with zinc nitrate, and then it was converted to nitrogen-doped porous carbons (NPCs) by direct carbonization. The as-prepared porous carbon (NPC800) was characterized by scanning electron microscopy (SEM), X-ray powder diffraction (XRD), N 2 sorption isotherms, and Xray photoelectron spectroscopy. NPC800 was modified onto glassy carbon electrode surface for investigating its electrochemical applications. Cyclic voltammetry (CV) and linear sweep voltammetry were performed to evaluate the electrocatalytic activity of NPC800 for oxygen reduction reaction (ORR) in alkaline solution. NPC800 exhibited better ORR activity than commercial Pt/C. Pt-catalyst supported on NPCs (Pt/NPC800) was prepared by means of electrodeposition and characterized by SEM, Energy dispersive spectrometry and XRD. The electrocatalytic activity and stability of Pt/NPC800 for methanol oxidation reaction (MOR) were estimated in acidic methanol solution by CV and chronoamperometric curves, respectively. Pt/NPC800 showed catalytic role for MOR, and also had better stability than Pt-catalyst supported on commercial Vulcan XC-72.

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Nitrogen-doped porous carbons through KOH activation with superior performance in supercapacitors

Cited by 358 publications

References 52 publications

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

Nitrogen-containing chitosan-based carbon as an electrode material for high-performance supercapacitors

Flexible N–doped TiO2/C ultrafine fiber mat and its photocatalytic activity under simulated sunlight

Nitrogen-doped porous carbons from bipyridine-based metal-organic frameworks: Electrocatalysis for oxygen reduction reaction and Pt-catalyst support for methanol electrooxidation

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