Preparation of activated carbon from cotton stalk and its application in supercapacitor

Chen, Mingde; Kang, Xueya; Wumaier, Tuerdi; Dou, Jie; Gao, Bo; Han, Ying; Xu, Gaohong; Liu, Zhiqiang; Zhang, Lu

doi:10.1007/s10008-012-1946-6

Cited by 153 publications

(52 citation statements)

References 35 publications

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“…S9 †). 69,70 Fig. 7 shows the nitrogen adsorption-desorption isotherms and pore size distributions of TKF and TKF/MnO 2 -6 composite.…”

Section: View Article Onlinementioning

confidence: 99%

Facile hydrothermal synthesis of tubular kapok fiber/MnO₂composites and application in supercapacitors

Zhang

et al. 2015

RSC Adv.

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Kapok fiber/MnO 2 (TKF/MnO 2 ) composites with a tubular structure are successfully fabricated via a facile hydrothermal process. Potassium permanganate and kapok fiber served as the manganese source and the template, respectively. The effects of operating parameters including material proportion, reaction temperature, reaction time and the growth mechanism of MnO 2 are studied in detail. A maximum specific capacitance of 117 F g À1 has been achieved at 0.25 A g À1 in 1 M Na 2 SO 4 and 95% specific capacitance is maintained after 1000 cycles, which demonstrates the potential application of tubular TKF/MnO 2 composites in supercapacitors. The superior electrochemical performances of the obtained composites are attributed to their hollow structure, thin wall thickness, and orderly pore passages, which can facilitate ion diffusion and improve the utilization of the electroactive sites of MnO 2 . † Electronic supplementary information (ESI) available: FTIR spectra and XRD patterns of TKF/MnO 2 -1-11, SEM of TKF/MnO 2 -11, FTIR spectra and digital photos of TKF-100-160 and TKF/MnO 2 -6, 9-11, EDS of TKF/MnO 2 -5 and TKF/MnO 2 -7, the BET specic surface areas and volumes of TKF and TKF/MnO 2 -2, 5-11 composites are summarized in Table S1, the nitrogen adsorption-desorption isotherms and pore size distributions of TKF and TKF/MnO 2 -2, 5-11 composites, CV, GCD and ESI analysis of TKF/MnO 2 -2, 5-11, the comparison in the capacitive performance of supercapacitors based on various natural ber composites. See Fig. 7 (a) N 2 adsorption-desorption isotherms of TKF and TKF/MnO 2 -6 composite and (b) BJH pore size distribution of TKF/MnO 2 -6 composites. 64072 | RSC Adv., 2015, 5, 64065-64075 This journal is

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“…S9 †). 69,70 Fig. 7 shows the nitrogen adsorption-desorption isotherms and pore size distributions of TKF and TKF/MnO 2 -6 composite.…”

Section: View Article Onlinementioning

confidence: 99%

Facile hydrothermal synthesis of tubular kapok fiber/MnO₂composites and application in supercapacitors

Zhang

et al. 2015

RSC Adv.

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“…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%

“…[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%

“…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%

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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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“…Currently, CSs derived carbonaceous materials have been mainly adopted as absorbents to remove organic pollutants in environmental fields ,. More recently, the energy storage application of CS‐derived carbons as electrode materials for organic supercapacitors has also aroused few researcher′s interest ,. However, few researchers adopt CS‐derived carbons as electrode material in application of aqueous supercapacitors.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Porous Carbons Derived from Cotton Stalks for High‐Performance Supercapacitors

2017

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In this work, cotton stalks (CSs), as an earth‐abundant biomass, were originally proposed as a new carbonaceous precursor to prepare hierarchically porous carbons (HPCs) with the activation of various concentrations of H3PO4 at high temperatures. A variety of measurements including SEM, TEM, N2 adsorption/desorption analysis, XPS and FTIR have been adopted to systemically investigate the micromorphology, pore structure, and surface chemistry of the HPCs. The CS‐derived HPCs (CSHPCs) have large specific surface areas up to 1403.123 m2 g−1 and a broad pore‐size distribution indicates their hierarchically porous structures. Furthermore, electrochemical measurements including electrochemical impedance spectroscopy, galvanostatic charge/discharge and cyclic voltammetry were used to evaluate the capacitance and rate performance of the HPCs. The investigations illustrated that CSHPCs possess a high specific capacitance up to 175 F g−1 at a scan rate of 5 mV s−1 in 2 M KOH. In addition, CSHPCs have good long‐term cycling stability and more than 90 % of the initial capacity is retained after 10000 cycles at a large current density of 1 A g−1.

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Preparation of activated carbon from cotton stalk and its application in supercapacitor

Cited by 153 publications

References 35 publications

Facile hydrothermal synthesis of tubular kapok fiber/MnO₂composites and application in supercapacitors

Facile hydrothermal synthesis of tubular kapok fiber/MnO₂composites and application in supercapacitors

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

Hierarchically Porous Carbons Derived from Cotton Stalks for High‐Performance Supercapacitors

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Preparation of activated carbon from cotton stalk and its application in supercapacitor

Cited by 153 publications

References 35 publications

Facile hydrothermal synthesis of tubular kapok fiber/MnO2composites and application in supercapacitors

Facile hydrothermal synthesis of tubular kapok fiber/MnO2composites and application in supercapacitors

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

Hierarchically Porous Carbons Derived from Cotton Stalks for High‐Performance Supercapacitors

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Facile hydrothermal synthesis of tubular kapok fiber/MnO₂composites and application in supercapacitors

Facile hydrothermal synthesis of tubular kapok fiber/MnO₂composites and application in supercapacitors