Methanesulfonic acid-assisted synthesis of N/S co-doped hierarchically porous carbon for high performance supercapacitors

Huo, Silu; Liu, Mingquan; Wu, Linlin; Liu, Mingjie; Xu, Min; Ni, Wei; Yan, Yi‐Ming

doi:10.1016/j.jpowsour.2018.03.061

Cited by 163 publications

(46 citation statements)

References 65 publications

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“…Chitosan is an abundant natural biopolymer with abundant amine functional groups. Methanesulfonic acid and chitosan were used to prepare an ionic organic compound 214. After carbonizing this ionic organic compound at 750 °C, a N/S doped carbon with an SSA of 1094 m 2 g −1 was obtained.…”

Section: Direct Pyrolysis Methodsmentioning

confidence: 99%

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: Direct Pyrolysis Methodsmentioning

confidence: 99%

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

et al. 2020

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“…To confirm it, the high resolution spectra of all elements were further conducted and carefully analyzed. The C1s can be divided into four peaks, which can be assigned to C−C (284.7 eV), C−S (285.2 eV), C−N/C−O (286.3 eV) and C=N/C=O (288.3 eV), respectively (Figure S1b) ,. From the N1s region spectrum, the fitted N1s shows three peaks at 398.6, 400.2, and 401.3 eV, which are associated with pyridinic, pyrrolic, and graphitic nitrogen, respectively (Figure a) ,, .…”

Section: Resultsmentioning

confidence: 99%

“…In the case of S 2p spectra, the dominant peak at 163.2 eV (2p 3/2 ) can be assigned to S−C bond (Figure b). Meanwhile, a small peak at 168.5 eV (2p 3/2 ) indicates the existence of S−N interaction . Obviously, the XPS results confirm the successful doping into carbon matrix by S and N, and the total content of which is about 6 at%( 2.21 and 4.12 at %), higher than single element doping of many literature reports.…”

Section: Resultsmentioning

confidence: 99%

Silkworm Excrement Derived In‐situ Co‐doped Nanoporous Carbon as Confining Sulfur Host for Lithium Sulfur Batteries

Zhang

Rao

et al. 2019

ChemistrySelect

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Lithium sulfur batteries (Li−S) are widely proposed as the next generation energy storage systems due to their super high energy density. However, one of the challenges remains in the “shuttle effects” of polysulfides, which hinders the practical application of Li−S. To address the above issue, herein, we propose an innovative design strategy of in‐situ co‐doped nanoporous carbon (ICPC) derived from silkworm excrement to achieve the strong chemical bonding and strict physical confinement of sulfur. As a result, the migration of polysulfides might be suppressed by the synergistic effects of physical and chemical interactions, which is helpful for the significant improvement of electrochemical performance. After 100 stable cyclic discharge‐charge tests at the current density of 0.2 C, the reversible capacity of the as obtained ICPC−S composite cathode still maintains around 500 mAh g−1, corresponding to 67% capacity retention. More importantly, high Coulombic efficiency of nearly 100% can be realized, suggesting the greatly avoided “shuttle effects”. Such a novel design of in‐situ co‐doped nanoporous carbon opens up new possibilities for high performance lithium sulfur batteries.

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“…[13][14][15][16][17][18] Reduced graphene oxide template method and high temperature pyrolysis biomass method are commonly used to prepare two-dimensional porous carbon nanosheets (2D PCNs). [19,20] However, despite these developments, there are several limitations of above investigation: (1) the multistep synthetic process makes it unfeasible for scale-up application. (2) the structure of most biomass-derived carbon materials is difficult to control.…”

Section: Introductionmentioning

confidence: 99%

“…The two‐dimensional carbon materials have been widely used in energy storage and conversion, electrocatalysis and other fields due to their high exposed active sites and convenient ion transport pathway . Reduced graphene oxide template method and high temperature pyrolysis biomass method are commonly used to prepare two‐dimensional porous carbon nanosheets (2D PCNs) . However, despite these developments, there are several limitations of above investigation: (1) the multistep synthetic process makes it unfeasible for scale‐up application.…”

Section: Introductionmentioning

confidence: 99%

Collapse‐Resistant Large‐Sized 2D Metal‐Organic‐Framework‐Derived Nitrogen‐Doped Porous Ultrathin Carbon Nanosheets for High‐Performance Supercapacitors

Zhou

2019

ChemElectroChem

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Metal‐organic‐framework (MOF)‐derived two‐dimensional materials have attracted tremendous attention in energy storage, because of their unique layered structure and abundant active sites. However, the facile synthesis of carbon materials simultaneously having large‐sized, ultrathin‐layered nanosheets and ultrahigh specific surface area remains a challenge. In this work, we develop a simple carbon protection strategy for efficiently stabilizing the ultrathin carbon nanosheets against structure degradation. The optimized as‐prepared sample (UPZCNs‐K4) exhibits a flat morphology with a large size (ca. 10 μm), a thickness of 2.8 nm, high pore volume, and a high capacitance of 402 F g−1 at 1 A g−1 in 6.0 M KOH aqueous electrolyte. An assembled symmetric supercapacitor delivers 16.18 W h kg−1 and 21.89 W h kg−1 output in KOH aqueous solution and Na2SO4 electrolytes, respectively. The excellent performances of the optimized sample can be attributed to the combination of ultrahigh specific surface area for ions storage and ultrathin structure with large size for a short ion diffusion distance. We believe this work will aid in designing ultrathin porous carbon nanosheets with new nanostructures toward energy‐related applications.

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Methanesulfonic acid-assisted synthesis of N/S co-doped hierarchically porous carbon for high performance supercapacitors

Cited by 163 publications

References 65 publications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Synthesis Strategies of Porous Carbon for Supercapacitor Applications

Silkworm Excrement Derived In‐situ Co‐doped Nanoporous Carbon as Confining Sulfur Host for Lithium Sulfur Batteries

Collapse‐Resistant Large‐Sized 2D Metal‐Organic‐Framework‐Derived Nitrogen‐Doped Porous Ultrathin Carbon Nanosheets for High‐Performance Supercapacitors

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