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
