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Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb3O7(OH) and Nb2O5 Superstructures for Energy Storage and Conversion Applications

Journal Article


Abstract


  • Three-dimensional (3D) metal oxide superstructures have demonstrated

    great potentials for structure-dependent energy storage and conversion

    applications. Here, we reported a facile hydrothermal method for direct growth of

    highly ordered single crystalline nanowire array assembled 3D orthorhombic

    Nb3O7(OH) superstructures and their subsequent thermal transformation into

    monoclinic Nb2O5 with well preserved 3D nanowire superstructures. The

    performance of resultant 3D Nb3O7(OH) and Nb2O5 superstructures differed

    remarkably when used for energy conversion and storage applications. The

    thermally converted Nb2O5 superstructures as anode material of lithium-ion

    batteries (LiBs) showed higher capacity and excellent cycling stability compared to

    the Nb3O7(OH) superstructures, while directly hydrothermal grown Nb3O7(OH)

    nanowire superstructure film on FTO substrate as photoanode of dye-sensitized

    solar cells (DSSCs) without the need for further calcination exhibited an overall

    light conversion efficiency of 6.38%, higher than that (5.87%) of DSSCs made from

    the thermally converted Nb2O5 film. The high energy application performance of the niobium-based nanowire

    superstructures with different chemical compositions can be attributed to their large surface area, superior electron

    transport property, and high light utilization efficiency resulting from a 3D superstructure, high crystallinity, and large

    sizes. The formation process of 3D nanowire superstructures before and after thermal treatment was investigated and

    discussed based on our theoretical and experimental results.

Authors


  •   Zhang, Haimin (external author)
  •   Wang, Yun (external author)
  •   Liu, Porun (external author)
  •   Chou, Shulei
  •   Wang, Jiazhao
  •   Liu, Hongwei (external author)
  •   Wang, Guozhong (external author)
  •   Zhao, Huijun (external author)

Publication Date


  • 2016

Citation


  • Zhang, H., Wang, Y., Liu, P., Chou, S., Wang, J., Liu, H., Wang, G. & Zhao, H. (2016). Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb3O7(OH) and Nb2O5 Superstructures for Energy Storage and Conversion Applications. ACS Nano, 10 (1), 507-514.

Scopus Eid


  • 2-s2.0-84989811361

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 507

End Page


  • 514

Volume


  • 10

Issue


  • 1

Place Of Publication


  • United States

Abstract


  • Three-dimensional (3D) metal oxide superstructures have demonstrated

    great potentials for structure-dependent energy storage and conversion

    applications. Here, we reported a facile hydrothermal method for direct growth of

    highly ordered single crystalline nanowire array assembled 3D orthorhombic

    Nb3O7(OH) superstructures and their subsequent thermal transformation into

    monoclinic Nb2O5 with well preserved 3D nanowire superstructures. The

    performance of resultant 3D Nb3O7(OH) and Nb2O5 superstructures differed

    remarkably when used for energy conversion and storage applications. The

    thermally converted Nb2O5 superstructures as anode material of lithium-ion

    batteries (LiBs) showed higher capacity and excellent cycling stability compared to

    the Nb3O7(OH) superstructures, while directly hydrothermal grown Nb3O7(OH)

    nanowire superstructure film on FTO substrate as photoanode of dye-sensitized

    solar cells (DSSCs) without the need for further calcination exhibited an overall

    light conversion efficiency of 6.38%, higher than that (5.87%) of DSSCs made from

    the thermally converted Nb2O5 film. The high energy application performance of the niobium-based nanowire

    superstructures with different chemical compositions can be attributed to their large surface area, superior electron

    transport property, and high light utilization efficiency resulting from a 3D superstructure, high crystallinity, and large

    sizes. The formation process of 3D nanowire superstructures before and after thermal treatment was investigated and

    discussed based on our theoretical and experimental results.

Authors


  •   Zhang, Haimin (external author)
  •   Wang, Yun (external author)
  •   Liu, Porun (external author)
  •   Chou, Shulei
  •   Wang, Jiazhao
  •   Liu, Hongwei (external author)
  •   Wang, Guozhong (external author)
  •   Zhao, Huijun (external author)

Publication Date


  • 2016

Citation


  • Zhang, H., Wang, Y., Liu, P., Chou, S., Wang, J., Liu, H., Wang, G. & Zhao, H. (2016). Highly Ordered Single Crystalline Nanowire Array Assembled Three-Dimensional Nb3O7(OH) and Nb2O5 Superstructures for Energy Storage and Conversion Applications. ACS Nano, 10 (1), 507-514.

Scopus Eid


  • 2-s2.0-84989811361

Has Global Citation Frequency


Number Of Pages


  • 7

Start Page


  • 507

End Page


  • 514

Volume


  • 10

Issue


  • 1

Place Of Publication


  • United States