Characterization and organic electric-double-layer-capacitor application of KOH activated coal-tar-pitch-based carbons: Effect of carbonization temperature

Choi, Poo Reum; Lee, Eunji; Kwon, Soon Hyung; Kim, Myung-Soo

doi:10.1016/j.jpcs.2015.08.007

Cited by 26 publications

(8 citation statements)

References 25 publications

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“…According to previous reports, the crystallinity of PANbased and aramid-based CFs increased as the carbonization temperature increased [10,11]. However, the crystallinity of pitch-based CFs exhibited an opposite trend in carbonization temperatures below 1000 o C [9,[14][15][16]. Namely, the crystallinity of the pitch decreased with carbonization temperatures in the range of 700-1000 o C; however, it increased eventually with a further increase in the carbonization temperature over 1000 o C. A proper explanation about this phenomenon could hardly be found.…”

Section: Characterization Of the Carbonized Pitch Fiber And Carbonizementioning

confidence: 75%

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Kim¹,

Roh²,

Kim³

2017

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Isotropic pitch-based fibers produced from coal tar pitch with the melt-blowing method were carbonized at temperatures ranging from 800 to 1600 o C to investigate their crystalline structure and physical properties as a function of the carbonization temperature. The in-plane crystallite size (L a ) of the carbonized pitch fiber from X-ray diffraction increased monotonously by increasing the carbonization temperature resulting in a gradual increase in the electrical conductivity from 169 to 3800 S/cm. However, the variation in the d 002 spacing and stacking height of the crystallite (L c ) showed that the structural order perpendicular to the graphene planes got worse in carbonization temperatures from 800 to 1200 o C probably due to randomization through the process of gas evolution; however, structural ordering eventually occurred at around 1400 o C. For the carbonized pitch powder without stabilization, structural ordering perpendicular to the graphene planes occurred at around 800-900 o C indicating that oxygen was inserted during the stabilization process. Additionally, the shear stress that occurred during the melt-blowing process might interfere with the crystallization of the CPF.

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Section: Characterization Of the Carbonized Pitch Fiber And Carbonizementioning

confidence: 75%

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Kim¹,

Roh²,

Kim³

2017

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“…Also, it is discernible that in wavelength around 3450 cm -1 major stretching peaks of minerals -OH is evident. For the acidized sample (spectrum (b)) the existence of a peak at the range of 1700-1760 cm -1 may indicate the formation of amide groups (-CO-NH-) during the acid treatment step [16,32]. Based on the FTIR analysis of carbon samples, it is possible to investigate the impact of carbonization temperature on the chemical properties of CTP based samples (see Figure 4).…”

Section: Effect Of Pre-treatment On the Structure Of Ctpmentioning

confidence: 99%

“…Although numerous researches focused on the effect of activation conditions on gas adsorption properties of activated CTPs [5,6], only a few reports deal with the impact of pre-treatment step of pitch-based adsorbents [16]. The matrix structure of the CTP material is associated with sorts of volatile components that come out of the structure or will be converted to carbon by treatment of the sample.…”

Section: Introductionmentioning

confidence: 99%

Superior performance of modified pitch-based adsorbents for cyclic methane storage

Mirzaei

Ahmadpour

Shahsavand

et al. 2020

Journal of Energy Storage

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“…When the sample is heated at 480 °C or 520 °C, the dehydrogenation polycondensation is the main reaction in the heat treatment process. There is a huge increase in the C/H molar ratio, as shown in Figure S1 b (in the Supporting Information), implying that the molecular aromaticity increases and the condensation degree deepens [15, 28, 29] . The change of characteristic peaks for aliphatic (2920/1440 cm −1 ) and aromatic (3045/700–900 cm −1 ) [30, 31] hydrocarbons in the infrared spectra also supports this point.…”

Section: Resultsmentioning

confidence: 52%

“…There is ah uge increase in the C/H molar ratio, as shown in Figure S1 b( in the Supporting Information), implying that the molecular aromaticity increases and the condensation degree deepens. [15,28,29] The change of characteristic peaks for aliphatic (2920/1440 cm À1 )a nd aromatic (3045/700-900 cm À1 ) [30,31] hydrocarbons in the infrared spectra also supports this point. The parameter CH 2 /CH 3 ,evaluated by the ratio of A 2920 and A 2950 (A represents the area of the peak), was introduced to evaluatet he length of aliphatic side chains.…”

Section: Resultsmentioning

confidence: 55%

Pitch‐Based Laminated Carbon Formed by Pressure Driving at Low Temperature as High‐Capacity Anodes for Lithium Energy Storage Systems

Yang

Song

Tian

et al. 2020

Chemistry A European J

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Pitch hasb een used to prepare electrodes by high-temperature heat treatments for supercapacitors, lithium-ion batteries, on account of its rich aromatic ring structure. Here, the toluene-soluble component of pitch is used to prepare ak ind of laminated carbon.T his was realized by at emplate-free synthesis at low temperature with the addition of pressure. Thet oluene-soluble component has as mall molecular weight, which makes the thermal deformation ability stronger and then enhances the orientation of the carbon layer with the help of pressure. The prepared anode exhibits as plendid electrochemical performance compared with the traditional graphite anode. Ah igh stable capacity of approximately 550 mAh g À1 at 50 mA g À1 ,w hich is much higher than graphite (372 mAh g À1), is obtained. Also, when the current density is up to 2Ag À1 ,t he capacity is about 150 mAh g À1 .S urprisingly,i ta lso delivers as uperior cycling performance. And when used as the anode/cathode electrode for lithium-ion capacitors, ah igh energy density can be obtained. The present work offers an opportunity to utilize the pitch source in lithium energy storagew ith promising cycle life, high energy/power density,a nd low cost.

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Characterization and organic electric-double-layer-capacitor application of KOH activated coal-tar-pitch-based carbons: Effect of carbonization temperature

Cited by 26 publications

References 25 publications

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Effect of carbonization temperature on crystalline structure and properties of isotropic pitch-based carbon fiber

Superior performance of modified pitch-based adsorbents for cyclic methane storage

Pitch‐Based Laminated Carbon Formed by Pressure Driving at Low Temperature as High‐Capacity Anodes for Lithium Energy Storage Systems

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