The rapidly growing two-dimensional material family transition metal carbonitrides ( MXenes ) have attracted attention as energy storage materials. MXenes mainly by containing Al of the MAX phase  ( where A = Al) prepared by dissolving the fluorine-containing solution, most other MAX phase it has not been explored.

Achievements

   Recently, Ningbo materials of Huang Qing researcher , Sichuan University of Linzi Feng researcher and Xiaoli Zhao , Professor and University of Toulouse, France ‘s Patrice Simon professor in the internationally renowned journal Nature Materials published entitled " MXene at The Frameworks the Promote Growth and Stability of LiF-Rich Solid−Electrolyte Interphases on Silicon Nanoparticle Bundles ” . Lewis acid proposed molten salt etch MAX phase synthesis 2D MXene general strategy, and through non-conventional MAX phase ( A , such as Si, Zn and Ga ) synthesized MXenes verify. Ti 3 C 2 obtained by this meltingT X  MXene negative electrode of Li + storage capacity of up to 738 C G ^-1  (205 mAh G ^-1 ) , high charge-discharge rate . 1 M . This route of synthesizing MXenes through molten salt has great application potential in the preparation of highly efficient electrochemical energy storage anode materials.

Figure  1  Schematic diagram of MXene preparation.

Figure  2 The appearance of  MXene .

Fig.  3.  The route of etching the MAX phase by the molten salt of Lewis acid .

Figure  4  shows the electrochemical performance of the MXene electrode.

in conclusion

       In summary, the MXenes anode prepared by the molten salt method has great potential in electrochemical energy storage devices ( batteries and lithium ion capacitors )  . The proposed Lewis acid corrosion route can be extended to a variety of precursors to prepare MXenes , and Regulate its surface chemical properties.

Original link:

https://www.nature.com/articles/s41563-020-0657-0

Source: MXene Academic