High supercapacitance performance of nitrogen-doped Ti3C2T prepared by molten salt thermal treatment

Functional Tailoring of Multi‐Dimensional Pure MXene Nanostructures for Significantly Accelerated Electromagnetic Wave Absorption

“…[ 27,28 ] After HF etching, the main diffraction peak (104) at 39° disappears due to the selective etching of the Al layer in MAX. [ 29 ] At the same time, the diffraction peaks located at 27.9°, 34.44°, and 60.78° in L‐MXene and N‐Mxene NRs are assigned to the (008), (0010), and (110) crystal planes of Ti 3 C 2 T x MXene phase, respectively, confirming that Ti 3 AlC 2 has been successfully transferred into Ti 3 C 2 T x . [ 30,31 ] Noticeably, the (002) crystal planes in L‐Mxene (8.4°) and N‐Mxene NRs (7.1°) successively shifted to lower 2 θ angles due to the sequential introduction of F − and OH − terminus, indicating that the interlayer spacing of MXene is increasing.…”

Nanocellulose-Linked MXene/Polyaniline Aerogel Films for Flexible Supercapacitors

“…The spectrum of MXene shows a characteristic peak at 1100 cm −1 corresponding to the surface C–F end groups. [ 34 ]. When CNFs were added into MXene, the absorption peaks of C–F were masked and the intensity of the –OH peaks increased because a large amount of –OH groups was introduced, whereas the spectrum of the MXene/CNF–PANI aerogel films only exhibited stretching vibrations of N–H between 3350–3344 cm −1 and double-bond vibrations of benzene and quinone ring molecules of the PANI chains at 1486 and 1579 cm −1 , respectively [ 35 ].…”

“…To understand the kinetic process of the charge/discharge profiles of the films, electrochemical impedance spectroscopy (EIS) measurements were conducted. Figure 6 shows the Nyquist curves of CNFs, MXene, MXene/CNF aerogel films and MXene/CNF–PANI aerogel films, in which two regions can be observed, i.e., semicircular arcs at high frequencies and a straight line at low frequencies [ 34 , 37 , 38 , 39 ]. For the MXene/CNF and MXene/CNF–PANI aerogel films, the straight-line regions are almost parallel to the Z′′ axis, indicating that ions could diffuse rapidly from the electrolyte solution to the film interface.…”

Modulation of the Cobalt Content in Ti3C2T x by Molten Salt Method for Hydrogen Evolution Reaction

“…After etching with hydrofluoric acid (HF), the peak (104) of Ti 3 AlC 2 at 39°disappeared and the peak (002) shifted from 9.86°to 9.30°, evidencing that the Ti 3 AlC 2 was converted to Ti 3 C 2 T x . 38,39 In contrast, the peak (002) of E-MS-Ti 3 C 2 T x etched by electrolysis in LiCl-KCl molten salt and sample etched by CoCl 2 •6H 2 O molten salt (MS-Ti 3 C 2 T x -7h) shifted toward a lower angle 8.14°and 8.11°, respectively. 35,40 In addition, the XRD patterns of MS-Ti 3 C 2 T x -7h washed with 2 M HCl showed no significant changes except for the removal of metallic Co impurities (Fig.…”