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.
Manimekalai et al. (Thu,) studied this question.