SCIENCE CHINA Materials, Volume 60, Issue 8: 755-765(2017) https://doi.org/10.1007/s40843-017-9074-x

In-situ phase transition to form porous h-MoO3@C nanofibers with high stability for Li+/Na+ storage

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  • ReceivedJun 12, 2017
  • AcceptedJul 11, 2017
  • PublishedAug 7, 2017


Porous h-MoO3@C nanofibers with a large specific surface area of 400.2 m2 g−1 were successfully synthesized with hot HNO3 oxidizing MoO2@C nanofibers without obvious damage to carbon shells. As anodes for lithium ion batteries (LIBs), the porous h-MoO3@C nanofibers electrodes show a reversible capacity of 302.9 mA h g−1 at 2 A g−1 after 500 cycles. As anodes for sodium ion batteries (SIBs), they also can deliver a good rate capacity and hold 108.9 mA h g−1 at 2 A g−1 after 500 cycles, even can have 91 mA h g−1 at 5 A g−1 after 1200 cycles. The excellent electrochemical performances of the porous h-MoO3@C nanofibers are attributed to the unique structure which not only can maintain the structure stability but also provide enough active sites for Li+/Na+. At the same time, the tunnel structure of h-MoO3 can lead to separate electron–hole and offer a great deal of special positions for cation (Li+/Na+) insertion/extraction. The present method may be helpful for the synthesis of transition metal oxides (TMOs)-carbon composites with high valence metal atoms in the field of batteries and catalysts.

Funded by

National Natural Science Foundation of China(51404103,51574117,61376073)

Hunan University Fund for Multidisciplinary Developing(2015JCA04)

Fundamental Research Funds for the Central Universities and Postdoctoral Science Foundation(2017M610495)


The present work was supported by the National Natural Science Foundation of China (51404103, 51574117 and 61376073), Hunan University Fund for Multidisciplinary Developing (2015JCA04), the Fundamental Research Funds for the Central Universities and the Postdoctoral Science Foundation of China (2017M610495).

Interest statement

The authors declare that they have no conflict of interest.

Contributions statement

Chen Z and Zhang M designed the project. Chen Z performed the main experiments. Liu Y participated in the article work. Zhang H, Ding S and Wang T helped with the experiments and analyzed the data. Chen Z and Zhang M wrote the manuscript, and all the authors revised the manuscript.

Author information

Zhi Chen is a PhD candidate at the School of Physics and Electronics, Hunan University. His current research is focused on transition metal oxides and porous carbon for energy storage and conversion.

Yongkang Liu is a graduate student at the School of Physics and Electronics, Hunan University. His current research is focused on nano-catalyst.

Ming Zhang is an associated professor in Hunan University since 2012. His research is focused on the design and synthesis of nanocomposites for supercapacitors, lithium ion batteries, and gas sensors. He has published more than 50 papers with more than 2600 citations.


Supplementary information

Supporting data are available in the online version of this paper.


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  • Figure 1

    (a) Schematic illustration shows the synthetic route for preparing porous h-MoO3@C nanofibers; (b) the transition of crystal structure from MoO2 to MoO3 through hot HNO3 oxidation.

  • Figure 2

    (a, b) SEM images of the as-synthesized MoO2@C and h-MoO3@C nanofibers, respectively; (c, d) XRD of the MoO2@C and h-MoO3@C nanofibers, respectively.

  • Figure 3

    (a, b) TEM images of the h-MoO3@C nanofibers; (c) nitrogen adsorption/desorption isotherms of the h-MoO3@C nanofibers (the inset is the pore-size distribution); (d) FTIR spectrum of the h-MoO3@C nanofibers.

  • Figure 4

    Low-resolution XPS spectrum (a), high-resolution XPS spectra of (b) C 1s, (c) O 1s, and (d) Mo 3d of the h-MoO3@C nanofibers.

  • Figure 5

    Electrochemical performances for Li+ storage: (a) CV curves; (b) charge/discharge curves; (c) rate performances of the h-MoO3@C nanofiber electrode; (d, e) cycling performances of h-MoO3@C nanofiber electrode at 0.5 and 2 A g−1, respectively.

  • Figure 6

    Electrochemical performances for Na+ storage. (a) CVs; (b) charge/discharge curves; (c) rate performance of the h-MoO3@C nanofiber electrode; cycling performance of MoO2@C (d), h-MoO3@C (e, f) nanofiber electrode at 0.1, 0.5, 1, 2 and 5 A g–1, respectively.

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