Graphene aided gelation of MXene with oxidation protected surface for supercapacitor electrodes with excellent gravimetric performance

3D Porous Oxidation‐Resistant MXene/Graphene Architectures Induced by In Situ Zinc Template toward High‐Performance Supercapacitors

“…This is obviously different from that of the GO (Figure S2, Supporting Information), which also has an ultrathin 2D sheet‐like structure but with some wrinkles. Because of the presence of considerable hydrophilic functional groups (F, O, and OH), [ 28–30 ] stable MXene/GO colloidal suspension could be readily obtained after stirring as a result of the strong electrostatic repulsion forces between neighboring nanosheets (Figure 1Ba and Figure S3, Supporting Information). When metallic zinc powder with size of 3–11 µm (Figure S4, Supporting Information) was added into the MXene/GO colloidal suspension followed by violent shaking for 3–5 s, both MXene and GO nanosheets were immediately adsorbed and assembled on the surface of zinc powder and rapidly settled down at the bottom of the vial leaving the clear and transparent supernatant (Figure 1Bb and Video S1, Supporting Information).…”

“…[ 20,31 ] iii) The continuous ionization of Zn particles, electrostatic attraction, and reduction lead to the layer‐by‐layer assembly of MXene and RGO nanosheets. [ 28 ] After the self‐assembly, 5 mL of concentrated hydrochloric acid was added to remove the excess metallic zinc powder. Lots of bubbles were formed and rapidly came up to the liquid level owing to the generation of considerable hydrogen, pulling the MXene/RGO assembly to rise to the mixture surface together (Figure 1Bc).…”

MXene/Graphene Oxide Heterojunction as a Saturable Absorber for Passively Q-Switched Solid-State Pulse Lasers

“…We suggest the reason to be that part of the Ti-C bond was broken, and a new chemical bond was formed, which may have originated from the formation of the MXene-GO heterojunction [42]. To the best of our knowledge, the oxidation of the MXene material in the air leads to a decrease in the Raman signal intensity or the modification of some Raman modes [43][44][45]. This oxidation directly affects the long-term stability of the MXene material and restricts its broad applications.…”

“…To the best of our knowledge, the oxidation of the MXene material in the air leads to a decrease in the Raman signal intensity or the modification of some Raman modes [ 43 , 44 , 45 ]. This oxidation directly affects the long-term stability of the MXene material and restricts its broad applications.…”

“…To validate the comparison results, we observed the Raman signal of the same MXene material at different spots and found that the vibration was much smaller than that of the sample that was exposed to air for a week. Therefore, we inferred that these modifications did not originate from the different spots of the samples [ 43 , 44 , 45 , 46 ]. Thus, we inferred that the MXene materials were endowed with increased stability through combination with the GO materials.…”