Leaf-inspired design of mesoporous Sb2S3/N-doped Ti3C2Tx composite towards fast sodium storage

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  • ReceivedDec 24, 2020
  • AcceptedJan 15, 2021
  • PublishedMar 12, 2021



the Shuguang Program from Shanghai Education Development Foundation and Shanghai Municipal Education Commission(18SG035)

State Key Laboratory for Modification of Chemical Fibers and Polymer Materials

Donghua University(KF2015)


This work was supported by the Shuguang Program from Shanghai Education Development Foundation and Shanghai Municipal Education Commission (18SG035) and State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, Donghua University (KF2015). Dr. Q. Zhang thanks the support by the National Natural Science Foundation of China (52072323, 51872098).

Interest statement

The authors declare no conflict of interest.

Supplementary data

Supporting Information

The supporting information is available online at http://chem.scichina.com and http://link.springer.com/journal/11426. The supporting materials are published as submitted, without typesetting or editing. The responsibility for scientific accuracy and content remains entirely with the authors.


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  • Figure 1

    (a) Schematic illustration of the synthetic process of L-Sb2S3/Ti3C2 composite. (b, c) SEM images with different magnifications, (d, e) TEM images (inset of (e) is the digital photo of an elm leaf), (f) HRTEM image, (g) SAED pattern, (h) STEM image of L-Sb2S3/Ti3C2 , and (i–m) EDX elemental mapping of Sb, S, Ti, C and N elements (color online).

  • Figure 2

    (a) N2 adsorption-desorption isotherm and corresponding pore size distribution curve (inset), and (b) XRD pattern of L-Sb2S3/Ti3C2. (c) TGA curves of L-Sb2S3/Ti3C2 and Ti3C2Tx Mxene. (d) XPS survey spectrum of L-Sb2S3/Ti3C2, and high-resolution XPS spectra of (e) Sb 3d, (f) S 2p, (g) Ti 2p, (h) C 1s, and (i) N 1s (color online).

  • Figure 3

    (a) CV curvesat a scan rate of 0.2 mV s−1, and (b) charge-discharge profiles of L-Sb2S3/Ti3C2 electrode at 100 mA g−1. (c) Cycling performances at 100 mA g−1, (d) rate capabilities, (e) capacity retention at different current densities, and (f) electrochemical impedance spectra of L-Sb2S3/Ti3C2, Sb2S3/Ti3C2 and Sb2S3 electrodes (color online).

  • Figure 4

    (a) CV curves of L-Sb2S3/Ti3C2 at various scan rates of 0.2–2 mV s−1. (b) Relationship between the logarithm peak currents and logarithm sweep rates. (c) Capacitive and diffusion-controlled contribution to charge storage at 1.0 mV s−1. (d) The percentages of capacitive and diffusion-controlled capacities at different scan rates of L-Sb2S3/Ti3C2 (color online).

  • Figure 5

    (a) Schematic illustration of the nanobattery setup for in-situ electrochemical sodiation/desodiation process. Time-resolved TEM images of L-Sb2S3/Ti3C2 electrode: (b) before sodiation, (c) during sodiation, (d) after sodiation, (e) after desodiation. Diffraction patterns (f) before sodiation, (g) during sodiation, (h) after sodiation, (i) after desodiation. (j) The statistics graph of long axis length variation. (k) Schematic of microstructural evolution of L-Sb2S3/Ti3C2 electrode (color online).

  • Figure 6

    Charge density difference of Na adsorbed onto (a) Sb2S3, (b) Ti3C2 and (c) Sb2S3-Ti3C2. The blue and yellow areas represent the electron depletion and accumulation, respectively. The adsorption energies for Na+ are listed in each case. (d–f) Corresponding density of states for Na-Sb2S3, Na-Ti3C2 and Na-Sb2S3-Ti3C2 (color online).


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