Three-dimensional porous carbon composites containing high sulfur nanoparticle content for high-performance lithium–sulfur batteries

Li, Guoxing; Sun, Jinhua; Hou, Wenpeng; Jiang, Shidong; Huang, Yong; Geng, Jianxin

doi:10.1038/ncomms10601

Cited by 654 publications

(422 citation statements)

References 69 publications

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“…The XPS and Raman results presented in Figs (10a–c) and (11a,b) are similar to results observed in reports related to the reduction of graphene oxide3031363738. These results indicate the re-graphitization, removal of oxides components and size reduction after reduction of graphene oxide.…”

Section: Methodssupporting

confidence: 88%

“…The origin of these species are not very clear but is likely due to S 2s30 or Cl 2p31 which are the impurities induced during the synthesis of graphene oxide32 using Hummer’s process that involves HCl, concentrated H 2 SO 4 , NaNO 3 , KMnO 4 and H 2 O 2 . These peaks indicate the presence of impurities despite several filtration steps performed for the removal of traces of acid and salt.…”

Section: Methodsmentioning

confidence: 99%

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Competition Between Resonant Plasmonic Coupling and Electrostatic Interaction in Reduced Graphene Oxide Quantum Dots

Karna

Mahat

Choi

et al. 2016

Sci Rep

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The light emission from reduced graphene oxide quantum dots (rGO-QDs) exhibit a significant enhancement in photoluminescence (PL) due to localized surface plasmon (LSP) interactions. Silver and gold nanoparticles (NPs) coupled to rGO nanoparticles exhibit the effect of resonant LSP coupling on the emission processes. Enhancement of the radiative recombination rate in the presence of Ag-NPs induced LSP tuned to the emission energy results in a four-fold increase in PL intensity. The localized field due to the resonantly coupled LSP modes induces n-π* transitions that are not observed in the absence of the resonant interaction of the plasmons with the excitons. An increase in the density of the Ag-NPs result in a detuning of the LSP energy from the emission energy of the nanoparticles. The detuning is due to the cumulative effect of the red-shift in the LSP energy and the electrostatic field induced blue shift in the PL energy of the rGO-QDs. The detuning quenches the PL emission from rGO-QDs at higher concentration of Ag NPs due to non-dissipative effects unlike plasmon induced Joule heating that occurs under resonance conditions. An increase in Au nanoparticles concentration results in an enhancement of PL emission due to electrostatic image charge effect.

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Section: Methodssupporting

confidence: 88%

Section: Methodsmentioning

confidence: 99%

Competition Between Resonant Plasmonic Coupling and Electrostatic Interaction in Reduced Graphene Oxide Quantum Dots

Karna

Mahat

Choi

et al. 2016

Sci Rep

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“…12,34 Thevolume expansion can be also relieved to a large extent in the Li-S battery with the porous carbon matrix as abuffer. 29,54,55 Here we apply the porous NGand RGF as the carbon matrix to form NG/S and NG-RFG/S composite in Li-S battery cathode.…”

Section: Resultsmentioning

confidence: 99%

Hierarchical nitrogen-doped porous graphene/reduced fluorographene/sulfur hybrids for high-performance lithium–sulfur batteries

Liu

Xiang

et al. 2017

Phys. Chem. Chem. Phys.

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It is a great challenge to obtain high performance cathodes with a high sulfur loading and good cycle performance due to the dissolution of intermediate lithium polysulfides in lithium-sulfur batteries. Herein, we report a novel hierarchical hybrid composed of nitrogen-doped porous graphene (NG), reduced fluorographene or graphene fluoride (RFG), and sulfur as a composite cathode in the Li-S batteries. In comparison with sulfur composites based on only either nitrogen-doped porous graphene or pure reduced fluorographene, the hierarchical hybrid of RFG, NG, and sulfur (NG-RFG/S) shows a better reversible capacity and rate capability performance due to a better confinement effect of lithium polysulfides and sulfur. The NG-RFG/S cathode with ∼63.2% S content exhibits a high discharge capacity of 1120 mA h g and retains 632 mA h g after 100 cycles at 0.1C. At the higher rate of 0.5C, the cell still maintains a discharge capacity of about 300 mA h g after 800 cycles, which reveals the great potential of this hybrid cathode for long-cycle-life, high energy density storage applications.

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“…[34] On the other side, pyrrolic-N and pyridinic-N often considered electrochemically active in aqueous solution, contributing pseudocapacitance due to the additional p-electron donation to the aromatic π system. [35] The total The electrochemical performances of MC-7-SD, MC-7-AD, and MC-7-FD have been evaluated in Figure 5.5. Figure 5.5a shows the rectangular-shaped CV curves of MC-7-SD, MC-7-AD, and MC-7-FD.…”

Section: Resultsmentioning

confidence: 99%

“…One-dimensional carbon structures like indented hierarchically porous carbon spheres, [31] interconnected mesoporous hollow carbon nanospheres, [32] and N-doped hollow carbon bowls [33] are applied to Li-S battery. Two-dimensional bubble-like interconnected carbon fabric [34] and threedimensional structures like graphitic carbon, [35] carbon nanotube foam [36] and pomegranate-like carbon cluster [26] are also applied in this field. The porous carbon frameworks not only act as hosts Chapter 2 Literature review for sulfur loading but also provide mechanical stability to the deposited sulfur for long-lasting cycling life.…”

Section: Other Electrochemical Energy Storage Techniquesmentioning

confidence: 99%

Synthesis of hollow-structured electrode material for energy storage

Sun¹

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Due to the high specific surface area, high chemical stability and good characteristics of electrical and thermal conductivity, hollow-structured materials have attracted extensive research interest as electrode materials for energy storage applications. The high specific surface area of hollowstructured materials provides a high contact area with electrolyte, facilitating the rapid diffusion and transport of electrolyte ions. The walls of electrode materials in hollow structures are relatively thin, providing short electron/ion diffusion length. Besides, the voids in hollow structures are beneficial for accommodating the volume expansion of the anode materials in lithium-ion batteries. Thus the specific capacity and cycling stability of the energy storage devices is enhanced with increased utilization of the electrode materials. However, it still remains challenging on maintaining the stability of the delicate hollow structure during cycling. Developing a facile strategy for the largescale synthesis of hollow-structured electrode materials is worth studying as well.The aims of this project include the design and synthesis of transition metal oxides hollow microspheres for lithium-ion battery application and highly porous carbon microspheres for supercapacitor and aluminum ion battery applications. In the aspect of transition metal oxides, double-shelled polypyrrole-zinc ferrite hollow microspheres will be fabricated and its electrochemical properties will be investigated. In the other aspect of highly porous carbon, nitrogen-doped mesopore-dominated carbon microspheres will be synthesized and its electrochemical properties will be investigated. Nitrogen-doped macroporous carbon microspheres will be fabricated and its structural parameters will be investigated. The specific achievements obtained in this thesis are listed as follows:Nanocompositing is known as a promising approach for the structural stabilization of the preformed hollow structures. In the first part, ZnFe 2 O 4 double-shell hollow microspheres are synthesized for the accommodation of the large volume expansion during lithiation. A facile and efficient vaporphase polymerization method is developed to coat the ZnFe 2 O 4 hollow spheres with polypyrrole.The thin polypyrrole coating improves not only the electronic conductivity but also the structural integrity of the ZnFe 2 O 4 hollow spheres. When evaluated as the anode in lithium-ion batteries, the polypyrrole coated ZnFe 2 O 4 hollow spheres manifest significantly improved cycling stability and rate capability than the pristine ZnFe 2 O 4 hollow spheres.Apart from transition metal oxide hollow spheres that used as anode in lithium-ion batteries, highly porous carbon materials show great potential on supercapacitors and other energy storage devices.Thus, in the second part, we develop a novel "spray drying-vapour deposition" method for the synthesis of the N-doped mesoporous carbon microspheres, in which, commercial Ludox silica nanoparticles are used as porogens for the surfactant-free sy...

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Three-dimensional porous carbon composites containing high sulfur nanoparticle content for high-performance lithium–sulfur batteries

Cited by 654 publications

References 69 publications

Competition Between Resonant Plasmonic Coupling and Electrostatic Interaction in Reduced Graphene Oxide Quantum Dots

Competition Between Resonant Plasmonic Coupling and Electrostatic Interaction in Reduced Graphene Oxide Quantum Dots

Hierarchical nitrogen-doped porous graphene/reduced fluorographene/sulfur hybrids for high-performance lithium–sulfur batteries

Synthesis of hollow-structured electrode material for energy storage

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