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<p>In this study, nanoflower-like tungsten selenide wrapped around a sheet-like titanium carbide structure was prepared for supercapacitor applications. The as-prepared 2D WSe<sub>2</sub>@2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> exhibited nanoflower-like surface morphologies of 2D WSe<sub>2</sub> uniformly coating the MXene sheets, as confirmed by FE-SEM with EDS mapping and HR-TEM. XPS analysis showed binding energy values of 434.7, 33.6, and 56.7&#xa0;eV corresponding to Ti 2p, W 4f, and Se 3d in the heterostructures. The XRD pattern displayed peaks at 2θ = 7.37° and 41.16°, assigned to the (002) and (003) crystalline planes of 2D WSe<sub>2</sub>@2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>. Raman spectroscopy revealed peaks at 248&#xa0;cm<sup>− 1</sup> (E<sub>2</sub>g) and 410&#xa0;cm<sup>− 1</sup> (A<sub>1</sub>g), representing the in-plane and out-of-plane vibrations of Ti-C groups in the heterostructures. The specific capacitances of 2D WSe<sub>2</sub>, 2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub>, and 2D WSe<sub>2</sub>@2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> were 227.58, 118.16, and 471.36&#xa0;F g<sup>− 1</sup>, respectively. The 2D WSe<sub>2</sub>@2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> heterostructure also demonstrated excellent cycling stability, retaining 96.37% of its capacity after 10,000 cycles, compared with retention rates of 79.69% for pristine 2D WSe<sub>2</sub> nanoflowers and 62.70% for 2D Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> nanosheets.</p>

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Nanoflower-like 2D WSe2-wrapped 2D Ti3C2Tx MXene heterostructure for supercapacitor applications

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月7日

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  • Alagumalai Manimekalai,
  • Sonaimuthu Mohandoss,
  • Raja Venkatesan,
  • Alexandre A. Vetcher,
  • Krishna Prakash Arunachalam,
  • Kuppu Sakthi Velu,
  • Seho Sun,
  • Seong-Cheol Kim

摘要

In this study, nanoflower-like tungsten selenide wrapped around a sheet-like titanium carbide structure was prepared for supercapacitor applications. The as-prepared 2D WSe2@2D Ti3C2Tx exhibited nanoflower-like surface morphologies of 2D WSe2 uniformly coating the MXene sheets, as confirmed by FE-SEM with EDS mapping and HR-TEM. XPS analysis showed binding energy values of 434.7, 33.6, and 56.7 eV corresponding to Ti 2p, W 4f, and Se 3d in the heterostructures. The XRD pattern displayed peaks at 2θ = 7.37° and 41.16°, assigned to the (002) and (003) crystalline planes of 2D WSe2@2D Ti3C2Tx. Raman spectroscopy revealed peaks at 248 cm− 1 (E2g) and 410 cm− 1 (A1g), representing the in-plane and out-of-plane vibrations of Ti-C groups in the heterostructures. The specific capacitances of 2D WSe2, 2D Ti3C2Tx, and 2D WSe2@2D Ti3C2Tx were 227.58, 118.16, and 471.36 F g− 1, respectively. The 2D WSe2@2D Ti3C2Tx heterostructure also demonstrated excellent cycling stability, retaining 96.37% of its capacity after 10,000 cycles, compared with retention rates of 79.69% for pristine 2D WSe2 nanoflowers and 62.70% for 2D Ti3C2Tx nanosheets.