SnSe2 nanocrystals coupled with hierarchical porous carbon microspheres for long-life sodium ion battery anode

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  • ReceivedSep 11, 2019
  • AcceptedDec 4, 2019
  • PublishedDec 30, 2019


Funded by

the National Key R&D Research Program of China(2016YFB0100201)

Beijing Natural Science Foundation(JQ18005)

the National Natural Science Foundation of China(51671003,21802003)

China Postdoctoral Science Foundation(2019TQ0001)

and the start-up supports from Peking University and Young Thousand Talented Program.


This work was supported by the National Key R&D Research Program of China (2016YFB0100201), Beijing Natural Science Foundation (JQ18005), the National Natural Science Foundation of China (51671003, 21802003), China Postdoctoral Science Foundation (2019TQ0001), and the start-up supports from Peking University and Young Thousand Talented Program.

Interest statement

The authors declare no conflict of interest.

Contributions statement

Guo S conceived the project and directed the experiment. Chen H designed the experiments. Chen H, Mu Z and Li Y prepared and carried out the main experiments and characterization. Chen H wrote the manuscript. All authors contributed to the data analysis, discussed the results, and commented on the manuscript.

Author information

Hui Chen is a PhD student of the University of Electronic Science and Technology of China under the supervision of Prof. Jinshu Wang. Currently, he is studying at Peking University as an exchange student in Prof. Shaojun Guo’s group. His research interests include the synthesis and characterization of nanomaterials for alkali-ion batteries, photocatalysis and perovskite solar cells.

Shaojun Guo received his BSc degree in Jilin University (2005) and PhD degree in the Chinese Academy of Sciences (2010). He worked as a postdoctoral researcher associate at Brown University (2011–2013) and as a prestigious Oppenheimer Distinguished Fellow at Los Alamos National Laboratory (2013–2015). He joined the College of Engineering, Peking University in 2015 and is currently a Professor. His research interests focus on engineering nanocrystals and 2D materials for catalysis, renewable energy, optoelectronics and biosensors.


Supplementary information

Experimental details and supporting data are available in the online version of the paper.


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  • Figure 1

    (a) Schematic illustration of the formation process of SnSe2 NCs/C microspheres. SEM images of the as-synthesized Sn-precursor microspheres (b, e); SnO2 NCs/C microspheres (c, f) and SnSe2 NCs/C microspheres (d, g).

  • Figure 2

    (a) Typical SEM image of SnSe2 NCs/C microspheres and the corresponding elemental mapping of (b) tin, selenium, and carbon elements. (c) TEM and (d) HRTEM images of SnSe2 NCs/C.

  • Figure 3

    (a) PXRD patterns of the as-synthesized Sn-precursor, SnO2 NCs/C, and SnSe2 NCs/C microspheres. (b) Nitrogen adsorption-desorption isotherms and pore size distribution (the inset) of SnSe2 NCs/C microspheres. XPS spectra of the SnSe2 NCs/C microspheres survey (c), C 1s (d), Sn 3d (e), and Se 3d (f).

  • Figure 4

    (a) CV curves of the SnSe2 NCs/C in the first five cycles at a scan rate of 0.1 mV s−1. (b) Charge-discharge profiles for the SnSe2 NCs/C at 100 mA g−1 in the first five cycles. (c) Cycling performances of the SnSe2 NCs/C and bulk SnSe2 at 100 mA g−1 for 100 cycles. (d) Rate performances of the SnSe2 NCs/C and bulk SnSe2 at various current densities from 0.1 to 1 A g−1. (e) CV curve with the pseudocapacitive contribution shown in the olive region at a scan rate of 5 mV s−1. (f) The bar chart shows the contribution ratios of capacitive capacity and diffusion-limited capacity at various scan rates. (g) Long-term cycle performance of SnSe2 NCs/C at 1 A g−1 for 1000 cycles.