A one-step moderate-explosion assisted carbonization strategy to sulfur and nitrogen dual-doped porous carbon nanosheets derived from camellia petals for energy storage

Wei, Tongye; Wei, Xiaolin; Yang, Liwen; Xiao, Huaping; Gao, Yong; Li, Huaming

doi:10.1016/j.jpowsour.2016.09.053

Cited by 97 publications

(53 citation statements)

References 50 publications

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“…In a one‐step experiment fabricating PCNSs, camellia petals were mixed with (NH 4 ) 2 S 2 O 8 and carbonized at high temperature (Figure 6b). 104 The obtained CNS exhibited a high SSA of 1122 m 2 g −1 , specific capacitances of 227.0 F g −1 at 0.5 A g −1 and 176.2 F g −1 at 20 A g −1 .…”

Section: New Chemical Activation Methodsmentioning

confidence: 89%

“…b) The preparation schematic of CNSs (above), the correlation of specific capacitances with current densities, Ragone plot, and the GCD cycling performance of CNS (below). Reproduced with permission 104. Copyright 2016, Elsevier.…”

Section: New Chemical Activation Methodsmentioning

confidence: 99%

“…Another typical oxidative chemical activation agent is ammonium persulfate ((NH 4 ) 2 S 2 O 8 ). (NH 4 ) 2 S 2 O 8 decomposes first at temperatures higher than 180 °C (Equation ), and finally decomposes completely into NH 3 , SO 3 , and H 2 O at temperatures higher than 400 °C (Equation ) 104,105. In a one‐step experiment fabricating PCNSs, camellia petals were mixed with (NH 4 ) 2 S 2 O 8 and carbonized at high temperature (Figure 6b).…”

Section: New Chemical Activation Methodsmentioning

confidence: 99%

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Synthesis Strategies of Porous Carbon for Supercapacitor Applications

et al. 2020

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Supercapacitors (SCs) have experienced a significant increase in research activity and commercialization during the past few decades. As the primary and most important electrode active material for commercial SCs, porous carbon is produced at an industrial‐scale through traditional carbonization‐activation strategies. Nevertheless, commercial porous carbon materials have some disadvantages such as high production cost, corrosion of equipment, and emission of toxic gases and byproduct pollutants during production. In recent years, huge efforts have been made to develop novel synthesis strategies for porous carbon materials. This review focuses on the pore formation mechanisms in traditional carbonization‐activation methods, emerging activation methods, template methods, self‐template methods, and novel emerging methods for the synthesis of porous carbons for SCs. Strategies developed so far for the synthesis of porous carbon materials are summarized. The mechanisms and recent advances for each strategy are reviewed. Furthermore, future directions and synthesis strategies for porous carbons are proposed.

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Section: New Chemical Activation Methodsmentioning

confidence: 89%

Section: New Chemical Activation Methodsmentioning

confidence: 99%

Section: New Chemical Activation Methodsmentioning

confidence: 99%

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Synthesis Strategies of Porous Carbon for Supercapacitor Applications

et al. 2020

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“…MB−Ca‐N‐800 shows the longest charging/discharging time and holds the highest specific capacitance of 300.5 F g −1 , which is higher than MB−Ca‐N‐700 (260.0 F g −1 ), MB−Ca‐800 (189.6 F g −1 ), and any other samples. The specific capacitance of MB−Ca‐N‐800 exceed most of the porous carbons and equals to top‐class N‐doped porous carbons, such as N‐doped porous CNFs (202 F g −1 ), N‐doped carbon spheres (228 F g −1 ), S/N co‐doped carbon nanosheets (275 F g −1 ), bagasse N‐doped carbon (302 F g −1 ), Coconut shell carbon (268 F g −1 ) and so on, as shown in Table S5.…”

Section: Resultsmentioning

confidence: 99%

Calcium Chloride Activation of Mung Bean: A Low‐Cost, Green Route to N‐Doped Porous Carbon for Supercapacitors

Zhong

Xie

et al. 2019

ChemistrySelect

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N‐doped porous carbons were prepared from mung bean flour by chemical activation with calcium chloride and urea. Adjusting the precursor and preparation temperature had significant effect on the graphitization, specific surface area, porosity and surface chemical composition of the porous carbons. The material prepared from the mixture of mung bean flour, urea, and calcium chloride at 800 °C was the optimal sample. It exhibited an excellent specific capacitance (247.2 F g−1 at 2 mV s−1 and 300.5 F g−1 at 1 A g−1, respectively), outstanding rate performance (178.6 F g−1 at 200 and 225 F g−1 at 100 A g−1, respectively) and good durability (93.2 and 97.5% capacitance retention after 10000 cyclic voltammograms and 2000 galvanostatic charge/discharge, respectively) in 6 M KOH. The structure‐performance relationships reveal that the excellent specific capacitance of this sample arises from its plentiful porosities, abundant doped‐N and high carbonation.

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“…[ 55,56 ] Apparently, PC‐10 sample owns the maximum coverage area in CV curve, indicating the largest specific capacitance. [ 57 ] The galvanostatic charge–discharge (GCD) curves of the four samples at 0.5 A g −1 do not show good symmetry and linear characteristics in acidic electrolyte (Figure 4b), also showing that the Coulombic efficiency and electrochemical reversibility are not ideal. Moreover, the corresponding specific capacitances are calculated from the GCD curves.…”

Section: Resultsmentioning

confidence: 99%

Integrating Effect of Surface Modification of Microporous Carbon by Phosphorus/Oxygen as well as the Redox Additive of p‐Aminophenol for High‐Performance Supercapacitors

Tang

Zhong

Líu

et al. 2020

Adv Materials Inter

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In present work, commercial microporous carbon materials are modified on the surface with phosphorus/oxygen species by using phytic acid as sole dopant, which plays crucial effect on the carbon structure, wettability, electrical conductivity, and capacitive behaviors. It reveals that with increasing the content of heteroatoms, the porosity and contact angle are decreased but the conductivity turns much larger. Furthermore, p‐aminophenol is introduced to serve as redox additive, which can produce more active surface sites by forming hydrogen bond and complexation with the surface functional groups, further providing additional pseudo‐capacitance. As a result, the energy density of carbon sample by phosphorus/oxygen doping in 1 m H2SO4 electrolyte with p‐aminophenol is as high as 9.2 Wh kg−1, which is 2.6 than that of pristine carbon. What is more, in terms of the simple operation and effective performance, the integration of surface modification toward carbon materials and redox additive can be favorable for largely enhancing the supercapacitor performance.

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A one-step moderate-explosion assisted carbonization strategy to sulfur and nitrogen dual-doped porous carbon nanosheets derived from camellia petals for energy storage

Cited by 97 publications

References 50 publications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Calcium Chloride Activation of Mung Bean: A Low‐Cost, Green Route to N‐Doped Porous Carbon for Supercapacitors

Integrating Effect of Surface Modification of Microporous Carbon by Phosphorus/Oxygen as well as the Redox Additive of p‐Aminophenol for High‐Performance Supercapacitors

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