Solvothermal Synthesis of Mesoporous Manganese Sulfide Nanoparticles Supported on Nitrogen and Sulfur Co‐doped Graphene with Superior Lithium Storage Performance

Li, Gangyong; He, Binhong; Zhou, Minjie; Wang, Guoxiang; Zhou, Ningbo; Xu, Wenyuan; Hou, Zhaohui

doi:10.1002/celc.201600327

Cited by 38 publications

(24 citation statements)

References 47 publications

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“…The excellent cycling stability of the α‐MnS/rGO electrode can be attributed to the introduction of rGO nanosheets which can accommodate the α‐MnS nanoflakes by preventing its aggregation, as well as the presence α‐MnS on the surface of rGO which inhibits its restacking, offering a large electrode/electrolyte interface for the charge‐transfer reaction and pathways for electrons transportation. Besides the dual doping of nitrogen and sulfur in α‐MnS/rGO which is an efficient way to improve the conductivity . Moreover, the increase of capacitance upon the long cycling could be also attributed to the activation effect through the electrochemical cycling, the improvement of the electrode surface wetting with cycling, and the diffusion of the electrolyte ions into the new‐opened micropores of the electrode by cycling, causing an increase of the electroactive surface area …”

Section: Resultsmentioning

confidence: 99%

“…At the high‐frequency region, the intersection of the curve at real part (Zr) represents the equivalent series resistance (ESR), which is related to the conductivity of the electrolyte, internal resistance of the electrode, and the contact resistance between the electrode and the electrolyte. From the plots, α‐MnS/rGO shows a lower value of ESR (0.49 Ω) than that of α‐MnS (9 Ω) due to the presence of rGO with the nitrogen and sulfur co‐doping, which enhances the electrical conductivity . In the lower frequency region, the slope of the curve represents the Warburg resistance that evaluates the diffusion resistance of ion in the electrolyte to the electrode surface .…”

Section: Resultsmentioning

confidence: 99%

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Hydrothermal Synthesis of α‐MnS Nanoflakes@Nitrogen and Sulfur Co‐doped rGO for High‐Performance Hybrid Supercapacitor

et al. 2018

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The α‐MnS nanoflakes/rGO sheets were obtained via a facile one‐step hydrothermal approach using carbon disulfide as sulfur source, and ethylenediamine as a complexing agent which forms a complex with Mn2+ ions. Oil droplets of carbon disulfide and water are bridged via the hydrophobic/hydrophilic nature of ethylenediamine. α‐MnS/rGO was successfully co‐doped by nitrogen and sulfur by the action of ethylenediamine and CS2, respectively. The as‐prepared material exhibits an excellent electrochemical performance with a remarkable specific capacitance of 700 F g−1 at a current density of 1 A g−1, high rate capability of 66.65% retention at 20 A g−1 and superior cycling stability of 127% capacitance retention after 10000 cycles. To further explore the electrochemical performance of α‐MnS/rGO, a hybrid supercapacitor device was assembled using the α‐MnS/rGO as a positive electrode and an activated carbon as a negative electrode. The fabricated device exhibits the highest energy density of 38.13 Wh kg−1 at a power density of 850 W kg−1 and still retains 21.25 Wh kg−1 at a power density of 17 kW kg−1. These superior results demonstrate that the α‐MnS/rGO nanoflakes electrode can be considered as a promising material for high‐performance supercapacitors.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Hydrothermal Synthesis of α‐MnS Nanoflakes@Nitrogen and Sulfur Co‐doped rGO for High‐Performance Hybrid Supercapacitor

et al. 2018

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“…The destruction of hexagonal graphite lattice symmetry after KOH activation and heteroatom doping, could generate lattice defects, disordered structure and more active sites. Raman spectra in Figure b present one peak at ∼1586 cm −1 corresponding to graphitic configuration (G band), and another peak at ∼1340 cm −1 associated with the defect‐induced mode (D band) . The D/G ratios before and after KOH treatment are 0.68 and 0.78, respectively.…”

Section: Resultsmentioning

confidence: 98%

Tailoring the Sodium Storage Performance of Carbon Nanowires by Microstructure Design and Surface Modification with N, O and S Heteroatoms

Qiao

Liu

et al. 2017

ChemElectroChem

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The electronic environment and physicochemical property of carbon materials can be easily tailored and modulated by heteroatom doping. Herein, we demonstrate that net‐like N, O, S triple‐doped microporous carbon nanowires (NOS‐MCNs) as an anode can be designed to improve the electrochemical performance of sodium ion batteries. Ammonium persulfate as oxidant can also provide a nitrogen and sulfur source for S‐containing PPy. The N, O and S atoms are introduced into the carbon skeleton with activation and carbonization processes to modify the surface properties. As an anode, the material exhibits a high specific capacity and a long lifespan (≈301 mA h g−1 at 0.2 A g−1 after 1000 cycles) as well as an excellent rate capability (158 mA h g−1 at an extremely high current density of 10 A g−1). This work offers a facile strategy to synthesize triple‐doped porous carbon materials for sodium ion batteries and other energy‐storage fields.

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“…Figure 8c shows deconvoluted high resolution S 2p spectra wherein, the characteristic 2p 3/2 and 2p 1/2 peaks are found at the binding energies of 162.8 and 165.4 eV, respectively. [38,39] It is noteworthy that, the peak at lowest binding energy (160.0 eV) attributes to the presence of S n 2À species corresponds to the metal sulfide peak. Similar findings are observed in the previous report stating the presence of metal sulfide peak.…”

Section: Resultsmentioning

confidence: 98%

Self‐Assembled Manganese Sulfide Nanostructures on Graphene as an Oxygen Reduction Catalyst for Anion Exchange Membrane Fuel Cells

2017

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The development of active, inexpensive, and durable nonprecious-metal electrocatalysts to replace high-cost Pt-based catalysts towards the commercialization of fuel cell technology is the focus in recent years. In this regard, we report a facile one-pot hydrothermal synthesis of self-assembled manganese sulfide on graphene layers (MnS/G), and is recognized as a nonprecious-metal catalyst for the efficient oxygen reduction reaction (ORR) in an alkaline medium. The phase purity and surface morphologies are investigated by using X-ray diffraction and scanning electron microscopic techniques, respectively. Optimized MnS/G with 50 % Mn exhibited excellent ORR properties with onset and half-wave potentials of 0.83 and 0.71 V vs. RHE, respectively. While evaluating the durability, only a 90 mV negative shift in its half-wave potential is observed after 5000 repeated potential cycles, which is also ascertained for up to 48 h of operation at a constant potential by using a chronoamperometric technique with 28 % degradation in the current. The optimized material is utilized as a cathode catalyst in fabricating membrane electrode assembly for performance evaluation in an anion exchange membrane fuel cell. A peak power density of 12 mW cm À2 is realized in H 2 ÀO 2 feeds under ambient temperature and pressure; thus, it looks as an alternative non-preciousmetal catalyst for fuel cell applications. water (18.2 MW cm) used throughout the present work was produced from Milli-Q system, Germany.

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Solvothermal Synthesis of Mesoporous Manganese Sulfide Nanoparticles Supported on Nitrogen and Sulfur Co‐doped Graphene with Superior Lithium Storage Performance

Cited by 38 publications

References 47 publications

Hydrothermal Synthesis of α‐MnS Nanoflakes@Nitrogen and Sulfur Co‐doped rGO for High‐Performance Hybrid Supercapacitor

Hydrothermal Synthesis of α‐MnS Nanoflakes@Nitrogen and Sulfur Co‐doped rGO for High‐Performance Hybrid Supercapacitor

Tailoring the Sodium Storage Performance of Carbon Nanowires by Microstructure Design and Surface Modification with N, O and S Heteroatoms

Self‐Assembled Manganese Sulfide Nanostructures on Graphene as an Oxygen Reduction Catalyst for Anion Exchange Membrane Fuel Cells

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