As a member of the two-dimensional nanomaterial family, transition metal carbides, nitrides, and carbonitrides ( MXenes ) exhibit excellent electrochemical, electrical, optical, and mechanical properties, and are widely used in energy storage, electronics, optoelectronics, biology Medicine, sensors and catalysis. Compared with other two-dimensional materials, MXenes has unique ultra-high metal conductivity, excellent dispersibility and hydrophilicity, and is particularly suitable for printing ink. Printing and coating methods before and after printing are a series of simple, economical, multi-functional, and environmentally friendly manufacturing technologies for MXenes -based devices. In addition, printing can achieve complex 3D architecture and versatility that are highly suitable for various applications . Through printing spraying and pattern spraying, fine patterning in three-dimensional space can greatly improve the performance and application scope of MXenes ; therefore, printing / coating technology is not only a device manufacturing tool, but also a new device application and Means of industrialization.

Achievements

Recently, Professor Husam N. Alshareef of King Abdullah University of Science and Technology published a paper entitled "MXene Printing and Patterned Coating for Device Applications" in the international top journal Advanced Materials . Discussed the preparation of MXenes ink and its rheology adjustment and proper storage of them, and introduced various MXenes printing / coating technology. Discussed recent applications in the fields of energy storage, electronics, optoelectronics, sensing and driving in printing and patterned coatings. Finally, it puts forward views on the current situation and future development direction in this field.

Picture  1 The key element to realize MXene printing / coating devices .

Figure  2 Top-down method of preparing MXene . 

Picture  3 Viscosity test of MXene dispersion .

Picture  4 Mainstream printing / coating technology for patterning MXene film .

Table  1  The latest progress of MXene -based supercapacitors.

Picture  5 Schematic of inkjet and extrusion printing MXene ink .

Picture  6 CV curve of MXene based supercapacitor .

Picture  7 Schematic of impression supercapacitor .

Figure  8  Schematic diagram of 3D printing architecture.

Figure  9  Preparation of double-sided MSCs .

Figure  10  Preparation of Si / MXene composite electrode.

Figure  11  Schematic diagram of 3D printing technology.

Figure  12  Schematic diagram of protein-mediated self-assembly of MXene nanosheets during inkjet printing .

Figure  13  Schematic diagram of a set of patterned MXene nanoparticles.

FIG. 14  is a schematic diagram of a transfer printing process for preparing MXene patterns on glass .

Figure  15  Schematic diagram of the blade structure.

in conclusion

It reviewed the progress of MXenes in rapid prototyping in energy storage, electronics, optoelectronics, sensing and driving in recent years . Special issues related to printing / coating technology are also discussed. Finally, the detailed optimization of ink and printing / coating processes is imminent. Refined printing and molding capabilities are expected to achieve good equipment performance, low manufacturing costs, easy integration, and miniaturization of MXenes -based devices.

Original link:

https://onlinelibrary.wiley.com/doi/full/10.1002/adma.201908486

Source: MXene Academic