Lignin-derived macroporous carbon foams prepared by using poly(methyl methacrylate) particles as the template

Seo, Jung-Kil; Park, Hyounmyung; Shin, Kunwoo; Baeck, Sung Hyeon; Rhym, Young-Mok; Shim, Sang Eun

doi:10.1016/j.carbon.2014.04.087

Cited by 79 publications

(35 citation statements)

References 38 publications

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“…[20][21][22][23] Recently,t he preparation of lignin-basedH PCs using templating methods has interested researchers worldwide. [24][25][26][27] However,t hese methods use complex polymerization reactions and consume large amountso fi norganic or organic templates. The preparation of lignin-derived HPC through af acile, one-step, template-free methodi sa ttractive.…”

Section: Introductionmentioning

confidence: 99%

3 D Hierarchical Porous Carbon for Supercapacitors Prepared from Lignin through a Facile Template‐Free Method

et al. 2015

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Lignin-derived hierarchical porous carbon (LHPC) was prepared through a facile template-free method. Solidification of the lignin-KOH solution resulted in KOH crystalizing within lignin. The crystalized KOH particles in solid lignin acted both as template and activating agent in the heat-treatment process. The obtained LHPC, exhibiting a 3D network, consisted of macroporous cores, mesoporous channels, and micropores. The LHPC comprised 12.27 at % oxygen-containing groups, which resulted in pseudocapacitance. The LHPC displayed a capacitance of 165.0 F g(-1) in 1 M H2 SO4 at 0.05 A g(-1) , and the capacitance was still 123.5 F g(-1) even at 10 A g(-1) . The LHPC also displayed excellent cycling stability with capacitance retention of 97.3 % after 5000 galvanostatic charge-discharge cycles. On account of the facile preparation of LHPC, this paper offers a facile alternative method for the preparation of hierarchical porous carbon for electrochemical energy storage devices.

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Section: Introductionmentioning

confidence: 99%

3 D Hierarchical Porous Carbon for Supercapacitors Prepared from Lignin through a Facile Template‐Free Method

et al. 2015

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“…A wide range of precursors have been reported for carbon foam synthesis including coal [5][6][7] , coke [8,9] , pitch [6,[10][11][12][13][14][15] , polymer [16][17][18][19] and biomass [20][21][22][23] . Of these materials, bituminous tar pitch and coal tar pitch are some of the most commonly used carbon precursors because pitch is already used in more-conventional activated carbon production processes, low cost pitch is widely available from the petrochemicals industry, and pitch has a high carbon content [24].…”

Section: Introductionmentioning

confidence: 99%

The preparation of activated carbon discs from tar pitch and coal powder for adsorption of CO 2 , CH 4 and N 2

Gao

Rufford

et al. 2017

Microporous and Mesoporous Materials

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We used a pitch foaming process to prepare high surface area activated carbon discs ACD with a relatively high mechanical strength (4.3 MPa) from mixtures of tar pitch and coal powders, with potassium hydroxide as a chemical activator. The two primary parameters investigated in this study were the amount of nitric acid used in the pitch pre-treatment and the size of the coal particles (0 -53 µm, 150 -250 µm, and 355 -550 µm). The pre-treatment of the pitch was observed to be critical in the production of the carbon discs and in this study the preferred ratio of 15 M nitric acid to pitch in weight was 17/100. The coal size of 0 -53 µm produced the activated carbon discs with the highest gas adsorption capacity, which we attribute to the stabilization of the pitch foaming process. Equilibrium adsorption capacities of CO 2 , N 2 , and CH 4 on the carbons were measured by a gravimetric sorption method at pressures up to 3500 kPa. At 298 K the adsorption capacities of carbon foam disc prepared with coal particle size of 0 -53 µm and pitch pre-treated with 18 ml HNO 3 per 100 g pitch were 3.08 mol/kg N 2 , 5.48 mol/kg CH 4 and 8.88 mol/kg CO 2 at about 3500 kPa.

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“…Recent researches in the field focus on naturally renewable alternative precursors for the preparation of carbon foams as the fossil fuels are depleting. Tannin [15][16][17], olive stone [18], sucrose [19][20][21][22][23][24], and lignin [25] are the naturally renewable precursors studied for the preparation of carbon foams. Among them, sucrose is a promising one as it is a low-cost and widely available agricultural product.…”

Section: Introductionmentioning

confidence: 99%

Graphene-reinforced carbon composite foams with improved strength and EMI shielding from sucrose and graphene oxide

2015

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Graphene-reinforced carbon composite foams were prepared by thermo-foaming of graphene oxide (GO) dispersions in molten sucrose to form solid organic foams followed by carbonization at 900°C. The hydrogen bonding interactions between sucrose hydroxyls and functional groups on GO decreased the melting point of sucrose from 185 to 120°C when the GO concentration increased from 0 to 1.25 wt%. The viscosity of GO dispersions in molten sucrose increased gradually with an increase in GO concentration up to 0.75 wt% and then rapidly up to 1.25 wt%. The foaming time and foam setting time decreased drastically from 6 to 1 h and 34 to 9 h, respectively, when the GO concentration increased from 0.15 to 1.25 wt% due to the catalytic effect of GO toward -OH to -OH condensation. The density and cell size of the carbon composite foams depended on the GO concentration. A maximum compressive strength and specific compressive strength of 5.2 MPa and 21.3 MPa g -1 cm -3 , respectively, achieved at a very low GO concentration of 0.25 wt% corresponded to an increase of 189 and 133 %. The electrical conductivity and EMI shielding effectiveness (SE) of the graphene-reinforced carbon composite foams increased with an increase in the GO concentration up to 0.15 wt% and then decreased. The decrease was due to a decrease in foam density and GO agglomeration at higher GO concentrations. The maximum SE and specific SE of 38.6 dB and 160 dB g -1 cm -3 were achieved at GO concentrations of 0.15 and 1 wt%, respectively.

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Lignin-derived macroporous carbon foams prepared by using poly(methyl methacrylate) particles as the template

Cited by 79 publications

References 38 publications

3 D Hierarchical Porous Carbon for Supercapacitors Prepared from Lignin through a Facile Template‐Free Method

3 D Hierarchical Porous Carbon for Supercapacitors Prepared from Lignin through a Facile Template‐Free Method

The preparation of activated carbon discs from tar pitch and coal powder for adsorption of CO 2 , CH 4 and N 2

Graphene-reinforced carbon composite foams with improved strength and EMI shielding from sucrose and graphene oxide

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