Nori-based N, O, S, Cl co-doped carbon materials by chemical activation of ZnCl2 for supercapacitor

Wang, Changshui; Liu, Tingzhi

doi:10.1016/j.jallcom.2016.11.206

Cited by 114 publications

(31 citation statements)

References 54 publications

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“…It indicates the O/N functional groups originated form wheat flour and urea during the carbonization process. For HPCN9/PANI, three peaks centered at 401.3, 399.6, and 398.2 eV indicate the positively charged nitrogen atoms (-NH + =), benzenoid amine (-NH-) and quinoid amine (-N =) in the deconvoluted N 1s spectra (Figure S1d), respectively (Yu et al, 2013a; Zhang Y. et al, 2015; Wang and Liu, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…Chemical activation is a preferable approach to prepare the high performance porous carbon using the chemical agents (KOH, NaOH, ZnCl 2 and H 3 PO 4 ) (Duan et al, 2016; Lei et al, 2016; Pang et al, 2016a,b; Goldfarb et al, 2017; Yang et al, 2019). The strong activation effect of KOH and NaOH can degrade the wheat flour into small molecular and lose a large proportion of carbon atoms, making the low yield of carbon materials (Wang and Liu, 2017). ZnCl 2 as a milder activation reagent can react with precursor by dehydrating and cross-linking along the temperature increase, creating hierarchical pores, high specific surface area and high yield.…”

Section: Introductionmentioning

confidence: 99%

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Construction of Ultrathin Nitrogen-Doped Porous Carbon Nanospheres Coated With Polyaniline Nanorods for Asymmetric Supercapacitors

Wang

Zheng

et al. 2019

Front. Chem.

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Porous carbon materials produced by biomass have been widely studied for high performance supercapacitor due to their abundance, low price, and renewable. In this paper, the series of nitrogen-doped hierarchical porous carbon nanospheres (HPCN)/polyaniline (HPCN/PANI) nanocomposites is reported, which is prepared via in-situ polymerization. A novel approach with one-step pyrolysis of wheat flour mixed with urea and ZnCl 2 is proposed to prepare the HPCN with surface area of 930 m 2 /g. Ultrathin HPCN pyrolysised at 900°C (~3 nm in thickness) electrode displays a gravimetric capacitance of 168 F/g and remarkable cyclability with losing 5% of the maximum capacitance after 5,000 cycles. The interconnected porous texture permits depositing of well-ordered polyaniline nanorods and allows a fast absorption/desorption of electrolyte. HPCN/PANI with short diffusion pathway possesses high gravimetric capacitance of 783 F/g. It can qualify HPCN/PANI to be used as cathode in assembling asymmetric supercapacitor with HPCN as anode, and which displays an exceptional specific capacitance of 81.2 F/g. Moreover, HPCN/PANI//HPCN device presents excellent cyclability with 88.4% retention of initial capacity over 10,000 cycles. This work will provide a simple and economical protocol to prepare the sustainable biomass materials based electrodes for energy storage applications.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Construction of Ultrathin Nitrogen-Doped Porous Carbon Nanospheres Coated With Polyaniline Nanorods for Asymmetric Supercapacitors

Wang

Zheng

et al. 2019

Front. Chem.

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“…At present, biomass raw materials including soybean, nori, cabbage, candlenut ower, loofah, potatoes, egg shell, silkworms, and peanut shells have been used to synthesize bio-carbon and applied for the electrode materials of supercapacitors. [18][19][20][21][22][23][24][25][26] Biomass carbon has exhibited good effects in supercapacitor applications, but the porous carbon in sakura petals has rarely been investigated.…”

Section: Introductionmentioning

confidence: 99%

Sakura-based activated carbon preparation and its performance in supercapacitor applications

et al. 2019

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“…In additional, the property also includes the ability to completely volatilize at 756°C, therefore promoting numerous pores 20 . Some studies have reported on the capacity to chemically activate carbon electrode, as seen in orange peels, 7 pine cone, 21 corn straw, 22 seaweed 23 …”

Section: Introductionmentioning

confidence: 99%

“…20 Some studies have reported on the capacity to chemically activate carbon electrode, as seen in orange peels, 7 pine cone, 21 corn straw, 22 seaweed. 23 Biomass has been identified as the most common precursor, based on the abundance, low cost, simple processing, and usability in a wide temperature range. 24 In addition, activated carbon derived from biomass provides a natural structure and pore, which is disordered by carbon atom and heteroatom, 25 and is known to contain majorly cellulose, hemicellulose, and lignin.…”

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confidence: 99%

Porous activated carbon monolith with nanosheet/nanofiber structure derived from the green stem of cassava for supercapacitor application

et al. 2020

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Carbonization and activation have been exploited as an economic and efficient approach toward the production of porous activated carbon monolith derived from green stem of cassava (GSC). In addition, ZnCl 2 was used as a chemical activator agent at various concentrations, therefore serving as a key factor in the development of porous carbon. The carbonization process (N 2) was integrated with physical activation (CO 2), and then N 2 sorption, scanning electron microscopy, X-ray diffraction, energy dispersive X-ray were examined to evaluate the specific surface area, pore structure characteristic, morphology structure, crystallinity, and the surface element, respectively. Furthermore, cyclic voltammetry was used to measure the electrochemical performance, through a two-electrode system in 1M H 2 SO 4. Therefore, the synthesized porous activated carbon exhibits a micropores-mesopores combination, and the optimized sample demonstrated nanosheet and nanofiber structures. The results show a high electrochemical behavior in 1M H 2 SO 4 electrolytes, by the electrodes, with specific capacitance, energy, and power densities of 164.58 F g −1 , 22.86 Wh kg −1 , and 82.38 W kg −1 , respectively. This route confirms the opportunity of using novel GSC in the production of porous carbon monolith with nanosheet/nanofiber structure for supercapacitor applications. K E Y W O R D S activated carbon, carbon porous, green stem of cassava, monolith, supercapacitor 1 | INTRODUCTION Green, renewable, and sustainable sources of energy systems are obtainable through the conversion of wind, water, and solar energy, 1 hence proper capture and storage is required for environmental friendly and economic application. 2 Meanwhile, supercapacitors possessing high power density, high charge-discharge rate, long cycle life, have the ability to store energy in the form of electric charges, 3 by providing a performance between capacitors and batteries. Conversely, the difference between both is that capacitors store and deliver energy incredibly quickly, while batteries have an ability to store high energy densities and also high voltages. 4 However, the main challenge of supercapacitor is related to the energy density entry through the narrow gap of batteries. Several electrode materials have been developed and suggested to improve energy density, power density, and cycle life of supercapacitor, 5 and three types were identified. These were then classified into carbonaceous

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Nori-based N, O, S, Cl co-doped carbon materials by chemical activation of ZnCl2 for supercapacitor

Cited by 114 publications

References 54 publications

Construction of Ultrathin Nitrogen-Doped Porous Carbon Nanospheres Coated With Polyaniline Nanorods for Asymmetric Supercapacitors

Construction of Ultrathin Nitrogen-Doped Porous Carbon Nanospheres Coated With Polyaniline Nanorods for Asymmetric Supercapacitors

Sakura-based activated carbon preparation and its performance in supercapacitor applications

Porous activated carbon monolith with nanosheet/nanofiber structure derived from the green stem of cassava for supercapacitor application

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