High-pressure salt templating strategy toward intact isochoric hierarchically porous carbon monoliths from ionic liquids

Zhang, Zhen; Feng, Junzong

doi:10.1039/c7ra09823e

Cited by 7 publications

(4 citation statements)

References 42 publications

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“…g) Comparison of surface areas with carbon materials reported in the literature. [ 7,10,11,13–15,17,32–64 ] Data points with a light gray color are calculated based on the density of graphite and total pore volume measured by N 2 adsorption/desorption experiment, which may have overestimated the actual density and was not reported. Detailed references and values are shown in Table S1, Supporting Information.…”

Section: Resultsmentioning

confidence: 99%

“…h) Comparison of volumetric surface areas and the number of synthesis steps with carbon materials reported in the literature. [ 7,10,11,13–15,17,32–64 ] Some data points have been added three extra steps accounting for the synthesis of commercial carbon precursors (Table S1, Supporting Information). [ 11,13,15,32–34,37,39,47,49,52–55,57–61,63,64 ]…”

Section: Resultsmentioning

confidence: 99%

“…A comparison of the surface area of our prepared samples with different carbon materials is shown in Figure 5g and Table S1, Supporting Information, including graphene‐derived carbon, biomass‐derived carbon, polymer‐derived carbon, silica‐templated carbon, and zeolite‐templated carbon. [ 7,10,11,13–15,17,32–64 ] For ACFP‐VF, both gravimetric and volumetric performances are not outstanding among many of the materials that have developed. However, due to self‐assembly, the volume of ACFP‐SA is rendered much smaller and thus has a much higher volumetric surface area (1081 m 2 cm −3 ).…”

Section: Resultsmentioning

confidence: 99%

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Densely Packed and Highly Ordered Carbon Flower Particles for High Volumetric Performance

et al. 2021

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Carbon materials with high specific surface areas are ideal support materials for many applications. However, high specific surface area and large pore volume usually render them with low bulk density, which is undesirable for applications aiming at high volumetric performance. Low bulk density stems from large interparticle‐free volume caused by inefficient random packing within the materials. Herein, a simple synthesis and assembly method is reported to afford dense carbon pellets with both high specific surface area and high bulk density, obtained from the ordered packing of low polydispersity carbon flower particles. The densely packed carbon flower particles exhibit similar specific surface area to their pressed powder analogs, while exhibiting a 66–84% increase in bulk density (0.815 g cm−3), and an ultrahigh volumetric surface area (1081 m2 cm−3). The advantages of our materials are demonstrated by supercapacitors, which achieve a high volumetric capacitance of up to 153 F cm−3. The results reinforce the importance of controlling particle size and shape for porous materials to reduce their bulk volume. The developed materials possessing high volumetric surface area will be useful for many applications, such as gas storage, supercapacitors, and batteries.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

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Densely Packed and Highly Ordered Carbon Flower Particles for High Volumetric Performance

et al. 2021

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“…These products react with the carbon containing precursor and by etching process induce porosity in the carbon structure. With proper selection of the salt and the process parameters such as pyrolysis time and temperature and also, type and the ratio of the salt and the carbon precursor, one can tune the pore size and distribution 17 , 19 , 20 , 28 .…”

Section: Introductionmentioning

confidence: 99%

Zinc-salt assisted synthesis of three-dimensional oxygen and nitrogen co-doped hierarchical micro-meso porous carbon foam for supercapacitors

Emrooz

Aghdaee

Rostami

2021

Sci Rep

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Nitrogen and oxygen co-doped hierarchical micro-mesoporous carbon foams has been synthesized by pyrolyzation treatment of a preliminary foam containing melamine and formaldehyde as nitrogen, carbon and oxygen precursors and Zn(NO3)2. 6H2O and pluronic F127 as micro-meso pores generators. Several characterizations including thermal gravimetric analysis (TGA), X-ray diffraction (XRD) and Raman spectroscopy, FTIR and X-ray photoelectron spectroscopy, N2 adsorption–desorption, field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM) were performed on the prepared foams. X-ray diffraction patterns, Raman spectra and N2 adsorption–desorption results confirmed that ZnO has pronounced effect on the graphitization of the prepared carbon foam. From X-ray diffraction, thermal gravimetric and N2 adsorption–desorption analysis results it was confirmed that the carbothermal reaction and the elimination of ZnO and also the elimination of pluronic F127 are the main factors for the induction of porosities in the foam structure. The presence of Zn(NO3)2. 6H2O and pluronic F127 in the initial composition of the preliminary foam results in the specific surface area as high as 1176 m2.g−1 and pore volume of 0.68 cm3.g−1. X-ray photoelectron and FTIR spectroscopy analyses results approved the presence of nitrogen (about 1.9 at %) in the form of pyridinic, graphitic and nitrogen oxide and oxygen (about 7.5 at. %) functional groups on the surface of the synthesized carbon foam. Electrochemistry analysis results including cyclic voltammetry (CV) and galvanostatic charge–discharge (GCD) and also electrochemical impedance spectroscopy (EIS) analysis illustrated the formation of an electric double layer supercapacitor with the capacitance as high as 137 Fg−1.

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Low-density, high-strength and large-scaled monolithic carbon aerogels fabricated via modified ambient pressure drying

et al. 2023

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High-pressure salt templating strategy toward intact isochoric hierarchically porous carbon monoliths from ionic liquids

Abstract: Using a high-pressure salt templating approach, a crack-free, hierarchically porous carbon monolith with good monolithic formability and integrity was prepared from an ionic liquid.

Cited by 7 publications

References 42 publications

Densely Packed and Highly Ordered Carbon Flower Particles for High Volumetric Performance

Densely Packed and Highly Ordered Carbon Flower Particles for High Volumetric Performance

Zinc-salt assisted synthesis of three-dimensional oxygen and nitrogen co-doped hierarchical micro-meso porous carbon foam for supercapacitors

Low-density, high-strength and large-scaled monolithic carbon aerogels fabricated via modified ambient pressure drying

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