The effect of the HClO4 oxidization of petroleum coke on the properties of the resulting activated carbon for use in supercapacitors

Mei-gen, Deng; Wang, Renqing

doi:10.1016/s1872-5805(13)60080-3

Cited by 12 publications

(10 citation statements)

References 14 publications

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“…The electrochemical performance of HPCs fabricated in this paper has been further compared with other carbon materials without hierarchical structure reported in literature. 21,[28][29][30][31][32][33][34][35][36] Obviously, the specic capacitance and rate performance of HPC-5 are both superior to most of the reported work, as shown in Fig. 7, indicating the great promising of the synthesized HPCs as electrode materials for high performance supercapacitors.…”

Section: Resultsmentioning

confidence: 99%

Facile fabrication of hierarchical porous carbon based on extract separated from coal with outstanding electrochemical performance

Chang

Qin

2017

RSC Adv.

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Section: Resultsmentioning

confidence: 99%

Facile fabrication of hierarchical porous carbon based on extract separated from coal with outstanding electrochemical performance

Chang

Qin

2017

RSC Adv.

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“…The surface area can even reach up to as high as 3000 m 2 g −1 when the KOH to coke ratio increases to 10 [ 21 ]. It is obvious that PC is very difficult to be activated due to its stable micrographic structure and lack of the initial pores [ 22 ]. During the activation of PC, large quantity of KOH was expended to obtain high surface area AC, which was uneconomic and eco-unfriendly.…”

Section: Introductionmentioning

confidence: 99%

Functionalization of Petroleum Coke-Derived Carbon for Synergistically Enhanced Capacitive Performance

Huang

Wang

et al. 2016

Nanoscale Res Lett

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Petroleum coke is a valuable and potential source for clean energy storage if it could be modified legitimately and facilely. In the present study, porous carbon with high surface area and abundant oxygen-containing groups was prepared from petroleum coke by chemical activation and modification processes. The as-prepared carbon exhibits a high surface area (1129 m2 · g−1) and stable micrographic structure. It presents a high specific capacitance and excellent rate performance in KOH electrolyte. Even at an ultrahigh current density of 50 A · g−1, the specific capacitance of the prepared carbon can still reach up to an unprecedented value of 261 F · g−1 with a superhigh retention rate of 81 %. In addition, the energy density of this material in aqueous electrolyte can be as high as 13.9 Wh · kg−1. The high energy density and excellent rate performance ensure its prosperous application in high-power energy storage system.

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“…In response to such demands, considerable research has been conducted on electrochemical capacitors [1][2][3][4][5][6][7][8] and lithium ion secondary batteries 9 10 as next-generation energy storage systems. Thanks to their capacity for fast charge and discharge, high charge and discharge efficiency, and semi-permanent cycle life characteristics, supercapacitors have consequently received attention as next-generation energy storage devices that can be used as auxiliary batteries or battery alternatives.…”

Section: Introductionmentioning

confidence: 99%

“…[1][2][3][4][5][6][7][8] Activated carbons have been studied broadly for decades and research has well characterized their structural characteristics, pore sizes, pore volume, size distribution, and surface area. Previous research has also studied carbonization and activation processes to a certain degree.…”

Section: Introductionmentioning

confidence: 99%

“…The electric operation of supercapacitors is considerably affected not only by types of ions, ion sizes, and sizes of electrolytes such as solvent molecules, but also by the essence and surface of the carbon materials including the exposed surface area and pore size distribution of activated carbons, and by their electronic conductivity and functional groups. [1][2][3][4][5][6][7][8] Consequently, the present study used CO 2 to activate coke-based activated carbons to develop their pore structure. It investigated the physical characteristics of activated carbons with well developed pores including their specific surface area and pore structure.…”

Section: Introductionmentioning

confidence: 99%

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The Effect of CO<SUB>2</SUB> Activation on the Electrochemical Performance of Coke-Based Activated Carbons for Supercapacitors

Lee¹,

Kim²,

An³

et al. 2015

j nanosci nanotechnol

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The present study developed electrode materials for supercapacitors by activating coke-based activated carbons with CO2. For the activation reaction, after setting the temperature at 1,000 degrees C, four types of activated carbons were produced, over an activation time of 0-90 minutes and with an interval of 30 minutes as the unit. The electrochemical performance of the activated carbons produced was evaluated to examine the effect of CO2 activation. The surface structure of the porous carbons activated through CO2 activation was observed using a scanning electron microscope (SEM). To determine the N2/77 K isothermal adsorption characteristics, the Brunauer-Emmett-Teller (BET) equation and the Barrett-Joyner-Halenda (BJH) equation were used to analyze the pore characteristics. In addition, charge and discharge tests and cyclic voltammetry (CV) were used to analyze the electrochemical characteristics of the changed pore structure. According to the results of the experiments, the N2 adsorption isotherm curves of the porous carbons produced belonged to Type IV in the International Union of Pore and Applied Chemistry (IUPAC) classification and consisted of micropores and mesopores, and, as the activation of CO2 progressed, micropores decreased and mesopores developed. The specific surface area of the porous carbons activated by CO2 was 1,090-1,180 m2/g and thus showed little change, but those of mesopores were 0.43-0.85 cm3/g, thus increasing considerably. In addition, when the electrochemical characteristics were analyzed, the specific capacity was confirmed to have increased from 13.9 F/g to 18.3 F/g. From these results, the pore characteristics of coke-based activated carbons changed considerably because of CO2 activation, and it was therefore possible to increase the electrochemical characteristics.

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The effect of the HClO4 oxidization of petroleum coke on the properties of the resulting activated carbon for use in supercapacitors

Cited by 12 publications

References 14 publications

Facile fabrication of hierarchical porous carbon based on extract separated from coal with outstanding electrochemical performance

Facile fabrication of hierarchical porous carbon based on extract separated from coal with outstanding electrochemical performance

Functionalization of Petroleum Coke-Derived Carbon for Synergistically Enhanced Capacitive Performance

The Effect of CO<SUB>2</SUB> Activation on the Electrochemical Performance of Coke-Based Activated Carbons for Supercapacitors

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