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Fabrication of Nb2O5 nanosheets for high-rate lithium ion storage applications.

Liu M, Yan C, Zhang Y - Sci Rep (2015)

Bottom Line: Nb2O5 nanosheets are successfully synthesized through a facile hydrothermal reaction and followed heating treatment in air.Such a unique two dimensional structure enables the nanosheet electrode with superior performance during the charge-discharge process, such as high specific capacity (~184 mAh·g(-1)) and rate capability.These results suggest the Nb2O5 nanosheet is a promising candidate for high-rate lithium ion storage applications.

View Article: PubMed Central - PubMed

Affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China.

ABSTRACT
Nb2O5 nanosheets are successfully synthesized through a facile hydrothermal reaction and followed heating treatment in air. The structural characterization reveals that the thickness of these sheets is around 50 nm and the length of sheets is 500 ~ 800 nm. Such a unique two dimensional structure enables the nanosheet electrode with superior performance during the charge-discharge process, such as high specific capacity (~184 mAh·g(-1)) and rate capability. Even at a current density of 1 A·g(-1), the nanosheet electrode still exhibits a specific capacity of ~90 mAh·g(-1). These results suggest the Nb2O5 nanosheet is a promising candidate for high-rate lithium ion storage applications.

No MeSH data available.


XRD patterns (a) and SEM images (b) of the Nb3O7F prepared at 160°C with 24 h. The standard diffraction peaks of Nb3O7F (JCPDF card No 74-2363) are included as reference. TEM image (c) and HRTEM image (d) of the as-obtained Nb3O7F nanosheets. The inset in (d) is the SAED pattern.
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f1: XRD patterns (a) and SEM images (b) of the Nb3O7F prepared at 160°C with 24 h. The standard diffraction peaks of Nb3O7F (JCPDF card No 74-2363) are included as reference. TEM image (c) and HRTEM image (d) of the as-obtained Nb3O7F nanosheets. The inset in (d) is the SAED pattern.

Mentions: As shown in Fig. 1a, XRD pattern of the as-obtained powders from hydrothermal process can be indexed as an orthorhombic Nb3O7F structure (JCPDS Card No. 74-2363). Fig. 1b shows the morphology of the as-prepared Nb3O7F, displaying two dimensional sheet-like structure. A TEM image of Nb3O7F nanosheets after ultrasound treatment is shown in Fig. 1c. It can be observed that these Nb3O7F nanosheets are rectangular shape. The nanosheets are almost transparent, suggesting the sheet is very thin. The size of these sheets is around 500 ~ 800 nm. The HRTEM image (Fig. 1d) and SAED pattern (top inset in Fig. 1d) reveal a good single crystalline nature of the Nb3O7F nanosheets. The lattice fringes show an interplanar spacing of ca. 0.38 nm and 0.39 nm (Fig. 1d), corresponding to the (010) and (001) planes of the orthorhombic Nb3O7F, respectively.


Fabrication of Nb2O5 nanosheets for high-rate lithium ion storage applications.

Liu M, Yan C, Zhang Y - Sci Rep (2015)

XRD patterns (a) and SEM images (b) of the Nb3O7F prepared at 160°C with 24 h. The standard diffraction peaks of Nb3O7F (JCPDF card No 74-2363) are included as reference. TEM image (c) and HRTEM image (d) of the as-obtained Nb3O7F nanosheets. The inset in (d) is the SAED pattern.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4321166&req=5

f1: XRD patterns (a) and SEM images (b) of the Nb3O7F prepared at 160°C with 24 h. The standard diffraction peaks of Nb3O7F (JCPDF card No 74-2363) are included as reference. TEM image (c) and HRTEM image (d) of the as-obtained Nb3O7F nanosheets. The inset in (d) is the SAED pattern.
Mentions: As shown in Fig. 1a, XRD pattern of the as-obtained powders from hydrothermal process can be indexed as an orthorhombic Nb3O7F structure (JCPDS Card No. 74-2363). Fig. 1b shows the morphology of the as-prepared Nb3O7F, displaying two dimensional sheet-like structure. A TEM image of Nb3O7F nanosheets after ultrasound treatment is shown in Fig. 1c. It can be observed that these Nb3O7F nanosheets are rectangular shape. The nanosheets are almost transparent, suggesting the sheet is very thin. The size of these sheets is around 500 ~ 800 nm. The HRTEM image (Fig. 1d) and SAED pattern (top inset in Fig. 1d) reveal a good single crystalline nature of the Nb3O7F nanosheets. The lattice fringes show an interplanar spacing of ca. 0.38 nm and 0.39 nm (Fig. 1d), corresponding to the (010) and (001) planes of the orthorhombic Nb3O7F, respectively.

Bottom Line: Nb2O5 nanosheets are successfully synthesized through a facile hydrothermal reaction and followed heating treatment in air.Such a unique two dimensional structure enables the nanosheet electrode with superior performance during the charge-discharge process, such as high specific capacity (~184 mAh·g(-1)) and rate capability.These results suggest the Nb2O5 nanosheet is a promising candidate for high-rate lithium ion storage applications.

View Article: PubMed Central - PubMed

Affiliation: i-Lab, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences, Suzhou, China.

ABSTRACT
Nb2O5 nanosheets are successfully synthesized through a facile hydrothermal reaction and followed heating treatment in air. The structural characterization reveals that the thickness of these sheets is around 50 nm and the length of sheets is 500 ~ 800 nm. Such a unique two dimensional structure enables the nanosheet electrode with superior performance during the charge-discharge process, such as high specific capacity (~184 mAh·g(-1)) and rate capability. Even at a current density of 1 A·g(-1), the nanosheet electrode still exhibits a specific capacity of ~90 mAh·g(-1). These results suggest the Nb2O5 nanosheet is a promising candidate for high-rate lithium ion storage applications.

No MeSH data available.