One-pot self-assembly of graphene/carbon nanotube/sulfur hybrid with three dimensionally interconnected structure for lithium–sulfur batteries

Niu, Shuzhang; Lv, Wei; Zhang, Chen; Shi, Yanting; Zhao, Jianfeng; Li, Baohua; Yang, Quan‐Hong; Kang, Feiyu

doi:10.1016/j.jpowsour.2015.06.122

Cited by 134 publications

(64 citation statements)

References 46 publications

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“…Meanwhile, these two plateaus in the discharge curves maintained almost the same potential during all cycles at 2C rate, implying stable charge transfer kinetics at the electrode-electrolyte interface during charge and discharge process even at fairly high rate current. 21 The charge-discharge potential difference (DE) of the batteries also remained almost constant with increasing cycle numbers, indicating excellent cycle reversibility of these batteries.…”

Section: à2mentioning

confidence: 91%

“…Among the carbon materials for Li-S batteries, graphene is a promising candidate because of its high electron mobility, good chemical stability, and super hydrophobicity at nanometer scale. [15][16][17] Graphene synthesized from chemical vapor deposition (CVD), 18 electrolytic exfoliation of graphite 19 and reduction of graphene oxide [20][21][22] has been utilized in Li-S batteries. However, the current fabrication processes are complicated, time-consuming, and costly, which involved toxic chemicals and corrosive acid.…”

Section: -9mentioning

confidence: 99%

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Facile synthesis of mesoporous graphene platelets with in situ nitrogen and sulfur doping for lithium–sulfur batteries

et al. 2017

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The interaction between lithium polysulfides and doped heteroatoms could prevent the loss of soluble polysulfides in the cathode and mitigate the shuttle effect in lithium-sulfur batteries. Herein, a facile synthesis of mesoporous graphene platelets (NSGs) with in situ nitrogen and sulfur doping by the pyrolysis of a self-assembled L-cysteine precursor on sodium chloride crystal surface for structuredirecting is presented. The mesoporous lamellar structure of the NSG possesses a uniform distribution of pyrrolic N, pyridinic N, and thiosulphate structured heteroatoms originating from in situ doping, which promotes the confinement of intermediate polysulfides. Combining the strong interactions with soluble polysulfide, flexible mesoporous architecture, and high conductivity of graphene, the prepared NSG material exhibited a high initial capacity of 1433 mA h g À1 at a 2C rate as well as a reversible capacity of 684 mA h g À1 after 200 cycles. This demonstrates that the in situ nitrogen and sulfur doped thin lamellar structure of graphene would be a promising cathode material for high performance lithium-sulfur batteries.

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Section: à2mentioning

confidence: 91%

Section: -9mentioning

confidence: 99%

Facile synthesis of mesoporous graphene platelets with in situ nitrogen and sulfur doping for lithium–sulfur batteries

et al. 2017

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“…The I D /I G of UC is estimated to be 1.421, which shows a high graphitization degree. The I D /I G value of the doped carbon (1.888) is higher than that of UC, owing to the defects in the carbon framework and the disorder of the materials introduced by the sulfur and nitrogen atoms doped in carbon [45,46].…”

Section: Morphologies and Structures Of Ns-cmentioning

confidence: 94%

“…The G-band can be used to characterize the sp 2 bond structure of carbon atoms, and the D band is related to the breaking of the symmetry caused by structural disorder and defects. The relative intensity ratio of the Dband to the G-band (I D /I G ) is directly proportional to the amount of structural disorder in carbon [45,46]. The UC is hydrothermally treated glucose by H 2 SO 4 but without L-cysteine.…”

Section: Morphologies and Structures Of Ns-cmentioning

confidence: 99%

Ultra-low charge transfer resistance carbons by one-pot hydrothermal method for glucose sensing

Liu

Zhao

et al. 2017

Sci. China Mater.

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Hydrothermal carbon (HTC) is typically welldispersed, but it remains a great challenge for HTC to become conductive. Co-doping with heteroatoms has been confirmed to be an effective strategy to significantly promote the electrical conductivity of carbon. Moreover, there is no simple and green method to construct sensitive HTC based electrochemical biosensors until now. In this paper, N and S dualdoped carbon (NS-C) with ultra-low charge transfer resistance is easily synthesized from L-cysteine and glucose in a hydrothermal reaction system. The morphology, structural properties and electrochemical properties of the as-prepared NS-C are analyzed. In comparison with the undoped hydrothermal (UC) modified glassy carbon electrode (GCE), the charge transfer resistance of UC (476 Ω , indicating a high affinity of glucose oxidase to glucose. These results demonstrate that the hydrothermal method is an effective way for preparing high electrical conductivity carbon with excellent performances in biosensor application.

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“…Nevertheless, as a twodimensional conductive support, graphene material has low conductive ability between the graphene sheets, which causes low electrochemical accessibility and might limit the rate capability of the sulfur-based composite cathodes [14]. To solve this problem, intercalating carbon nanotubes between graphene sheets and linking graphene, forming a conductive network, could improve the three-dimensional conductivity of graphene sheets and meanwhile supply an unimpeded and continuous path for electron and Li ion transfer and accommodate the volume variation of sulfur during charge/discharge cycling [15,16]. In Zhang's study, a novel graphene/single-walled carbon nanotube hybrid was designed by one-step catalytic growth.…”

Section: Introductionmentioning

confidence: 99%

A simple approach to synthesize novel sulfur/graphene oxide/multiwalled carbon nanotube composite cathode for high performance lithium/sulfur batteries

Yuan

Zhao

Jin

et al. 2016

Ionics

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A sulfur/graphene oxide/multiwalled carbon nanotube (S/GO/MWNT) composite was synthesized via a simple ultrasonic mixing method followed by heat treatment. By taking advantage of this solution-based self-assembly synthesis route, poisonous and noxious reagents and complicated fabrication processes are rendered unnecessary, thereby simplifying its manufacturing and decreasing the cost of the final product. Transmission and scanning electronic microscopy observations indicated the formation of the threedimensional interconnected S/GO/MWNT composite through the environmentally friendly process. The GO layers and long MWNTs synergistically constructed hierarchical electron/ion pathways, favoring the ion transport and electrolyte diffusion. The interlaced network can serve as sponges to physically absorb polysulfides to their wrinkled surface and porous structure. In addition, GO could confine the polysulfides' dissolution through chemical absorption by the functional groups on GO layers. Therefore, the resulting S/GO/MWNT composite exhibits good rate capability and highly stable specific discharge capacity of 773 mA h g −1 after 100 cycles at 0.1 C.

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One-pot self-assembly of graphene/carbon nanotube/sulfur hybrid with three dimensionally interconnected structure for lithium–sulfur batteries

Cited by 134 publications

References 46 publications

Facile synthesis of mesoporous graphene platelets with in situ nitrogen and sulfur doping for lithium–sulfur batteries

Facile synthesis of mesoporous graphene platelets with in situ nitrogen and sulfur doping for lithium–sulfur batteries

Ultra-low charge transfer resistance carbons by one-pot hydrothermal method for glucose sensing

A simple approach to synthesize novel sulfur/graphene oxide/multiwalled carbon nanotube composite cathode for high performance lithium/sulfur batteries

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