Ionization-bombardment assisted deposition of MXene/SiC heterostructure for micro-supercapacitor with enhanced sodium storage

Recent progress in MXene layers materials for supercapacitors: High‐performance electrodes

“…59 In LiF + HCl, NH 4 + etchants, both Li + and NH 4 + have the ability to intercalate in MXene, thus allowing mechanical sonication to obtain a single layer of MXene, while etching steps where intercalation is not possible (e.g., HF) require additional intercalation to obtain a single layer of MXene, with the option of mechanical layering and solvent intercalation layering methods. 15,[60][61][62][63][64][65][66] Due to the strong interactions between multiple layers of MXene, most organic compounds are currently chosen as intercalators for delamination, [67][68][69][70][71][72] for example, hydrazine hydrate, urea, isopropylamine, tetrabutylammonium hydroxide or dimethylsulfoxide after HF etching, the latter two being considered as excellent intercalators for use. [73][74][75][76][77][78][79][80] In summary, it can be seen that the various preparation schemes for MXene have shortcomings.…”

“…According to theoretical calculations, MXenes without functional groups on the surface exhibit a certain degree of magnetism, 127–129 but once functional groups are present, the magnetism decreases or even disappears, but there are special cases where, for example, chromium‐based MXenes exhibit magnetism even in the presence of functional groups 64 …”

“…15 According to theoretical calculations, MXenes without functional groups on the surface exhibit a certain degree of magnetism, [127][128][129] but once functional groups are present, the magnetism decreases or even disappears, but there are special cases where, for example, chromium-based MXenes exhibit magnetism even in the presence of functional groups. 64 These properties have made MXene widely studied in various fields. For example, in the field of energy storage, 40,76,[130][131][132][133][134][135][136] Zhang et al 137 used C-MoS 2 /CNTs-Ti 3 C 2 composite negative electrodes to achieve excellent performance sodium-ion batteries.…”

Vacancy-modified few-layered GaN crystal for novel high-temperature energy storage

“…4g shows the Ragone plot of the IL-based GaN SC. These high power-energy densities exceed those of many other previously reported SC devices, such as graphene oxide (8.55 μW h cm −2 , 0.0853 mW cm −2 , 100 °C), 42 graphene (1.63 μW h cm −2 , 0.09 mW cm −2 , 100 °C), 43 SiC@C (1.37 μW h cm −2 , 4.84 mW cm −2 ), 44 MXene/SiC heterostructure (6 μW h cm −2 , 8 mW cm −2 ), 45 GaN MM (0.65 μW h cm −2 , 45 mW cm −2 ), 14 porous AlN (3.88 μW h cm −2 , 0.34 mW cm −2 ), 46 GaN crystal membrane (0.58 μW h cm −2 , 45 mW cm −2 ), 47 4H-SiC (2.20 μW h cm −2 , 11.2 mW cm −2 ), 48 CDC/TiC film (1.58 μW h cm −2 , 0.28 mW cm −2 ), 49 and I-Ti 3 CT x (0.63 μW h cm −2 , 0.32 mW cm −2 ) devices. 50 We believe that excellent performance can be realized in extreme environments by utilizing state-of-the-art electrode materials and packaging techniques.…”

Recent Research Progress in the Structure, Fabrication, and Application of MXene-Based Heterostructures

“…Converting the planar structure of 2D MXene film into an interpenetrating network with open or porous structures is an effective way to construct high-performance supercapacitors. Xia et al [ 97 ] prepared a MXene/SiC heterostructure by ionization-bombardment assisted deposition for a micro-supercapacitor. The electrochemical test results showed that the specific capacity of the MXene/SiC heterostructure was as high as 97.8 mF·cm −2 at the current density of 1 A·cm −2 , which was mainly due to the unique three-dimensional network structure of the heterostructure.…”