Three-dimensional nitrogen-doped graphene frameworks anchored with bamboo-like tungsten oxide nanorods as high performance anode materials for lithium ion batteries

Gu, Xinyuan; Wu, Feilong; Lei, Bingbing; Wang, Jing; Chen, Ziliang; Xie, Kai; Song, Yun; Sun, Dalin; Sun, Lin; Zhou, Huaiying; Fang, Fang

doi:10.1016/j.jpowsour.2016.04.103

Cited by 63 publications

(24 citation statements)

References 63 publications

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“…WO 3 , with a low band gap, is an important n-type semiconductor [ 7 , 8 ]. It has been widely used in gas sensing [ 9 , 10 , 11 ], lithium-ion batteries [ 12 , 13 ], smart windows [ 14 ] and photocatalysis [ 15 , 16 ]. WO 3 exhibits both a high response and a high photocatalytic efficiency upon visible light irradiation [ 17 ].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Gong

et al. 2018

Materials

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Tungsten trioxide (WO3) nanorods are synthesized on the surface of graphene (GR) sheets by using a one-step in-situ hydrothermal method employing sodium tungstate (Na2WO4·2H2O) and graphene oxide (GO) as precursors. The resulting WO3/GR nanocomposites are characterized by X-ray diffraction, Raman spectroscopy, transmission electron microscopy, scanning electron microscopy and X-ray photoelectron spectroscopy. The results confirm that the interface between WO3 nanorod and graphene contains chemical bonds. The enhanced optical absorption properties are measured by UV-vis diffuse reflectance spectra. The photocatalytic activity of the WO3/GR nanocomposites under visible light is evaluated by the photodegradation of methylene blue, where the degradation rate of WO3/GR nanocomposites is shown to be double that of pure WO3. This is attributed to the synergistic effect of graphene and the WO3 nanorod, which greatly enhances the photocatalytic performance of the prepared sample, reduces the recombination of the photogenerated electron-hole pairs and increases the visible light absorption efficiency. Finally, the photocatalytic mechanism of the WO3/GR nanocomposites is presented. The synthesis of the prepared sample is convenient, direct and environmentally friendly. The study reports a highly efficient composite photocatalyst for the degradation of contaminants that can be applied to cleaning up the environment.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Gong

et al. 2018

Materials

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“…The signal of N 1s could be obviously resolved into two peaks with binding energy of 398.28 and 399.86 eV (Fig. 3c), corresponding to pyridinic nitrogen and pyrrolic nitrogen [33,34], further confirming that the existence of nitrogen in MoO 2 @NC NFs. It is well-known that the nitrogen-doped carbon material can enhance the electrical conductivity and accelerate the reaction speed of the carbonaceous composites [35][36][37].…”

Section: Resultsmentioning

confidence: 55%

Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

et al. 2017

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MoO 2 @N-doped C nanofibers (MoO 2 @NC NFs) were synthesized by electrospinning with polyacrylonitrile as carbon source. The in situ formed MoO 2 nanocrystals are completely embedded in the carbon nanofibers, which can not only accelerate ion transition, but also act as a buffer to avoid the mechanical degradation of active material due to the volume changes during charge/discharge cycling. When used as the anode material for both Li/Na-ion batteries, the as-synthesized MoO 2 @NC NFs displayed excellent Li + /Na + storage properties. As the anode for Li-ion battery, the MoO 2 @NC NFs display a high discharge capacity of 930 mA h g −1 at a current density of 200 mA g −1 for 100 cycles, and 720 mA h g −1 at a current density of 1 A g −1 for 600 cycles. Moreover, the discharge capacity of 350 mA h g −1 could be realized at a current density of 100 mA g −1 for 200 cycles for Na-ion battery.

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“…The ZnO/NG electrodes exhibit the smallest charge transfer impedance. The results could be due to the changes in the material conductivity and morphology introduced by N-doped graphene sheets [ 35 ]. The N-doped graphene can enhance the charge transfer conditions by providing an effective electron conduction path and shortening the Li + diffusion distance within the nanosized ZnO particles anchored evenly on the N-doped graphene sheets.…”

Section: Resultsmentioning

confidence: 99%

“…To meet this challenge, nitrogen-doped (N-doped) graphene can increase its conductivity by raising the Fermi level towards the conduction band compared with pure graphene [ 33 ]. Moreover, N-doped graphene (NG) can offer more active nucleation sites, which effectively prevent the aggregation of nanoparticles and strengthen the binding energy [ 34 , 35 ]. Therefore, compared to graphene, NG is more favorable for the composition of the nanosheets with metal oxides.…”

Section: Introductionmentioning

confidence: 99%

Anchoring ZnO Nanoparticles in Nitrogen-Doped Graphene Sheets as a High-Performance Anode Material for Lithium-Ion Batteries

et al. 2018

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A novel binary nanocomposite, ZnO/nitrogen-doped graphene (ZnO/NG), is synthesized via a facile solution method. In this prepared ZnO/NG composite, highly-crystalline ZnO nanoparticles with a size of about 10 nm are anchored uniformly on the N-doped graphene nanosheets. Electrochemical properties of the ZnO/NG composite as anode materials are systematically investigated in lithium-ion batteries. Specifically, the ZnO/NG composite can maintain the reversible specific discharge capacity at 870 mAh g−1 after 200 cycles at 100 mA g−1. Besides the enhanced electronic conductivity provided by interlaced N-doped graphene nanosheets, the excellent lithium storage properties of the ZnO/NG composite can be due to nanosized structure of ZnO particles, shortening the Li+ diffusion distance, increasing reaction sites, and buffering the ZnO volume change during the charge/discharge process.

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Three-dimensional nitrogen-doped graphene frameworks anchored with bamboo-like tungsten oxide nanorods as high performance anode materials for lithium ion batteries

Cited by 63 publications

References 63 publications

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Synthesis and Characterization of WO3/Graphene Nanocomposites for Enhanced Photocatalytic Activities by One-Step In-Situ Hydrothermal Reaction

Electrospun MoO2@NC nanofibers with excellent Li+/Na+ storage for dual applications

Anchoring ZnO Nanoparticles in Nitrogen-Doped Graphene Sheets as a High-Performance Anode Material for Lithium-Ion Batteries

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