Research Background   
Mass production of ordered porous three-dimensional (3D) electrodes is an important prerequisite for realizing energy storage devices. MXenes has attracted extensive attention due to its excellent electrical conductivity and surface redox reactions; however, MXenes faces the challenge of achieving a three-dimensional porous structure, especially under the conditions of large mass loads.

Achievements
      Recently, Professor Bo Zheng from Zhejiang University published a research paper titled High-Mass-Loading Porous Ti3C2Tx Films for Ultrahigh-Rate Pseudocapacitors in the well-known academic journal ACS Energy Letters. The article designed and synthesized a three-dimensional high-rate capacitor electrode with high use value.

Graphic guide



Figure 1. SEM and RRFCA principle description.



Figure 2. XPS FTIR and surface zeta potential characterization.

 
Figure 3. Comparative test of electrochemical performance.


Figure 4. Electrochemical performance test of porous MXene membrane.


Summary of this article
   This article introduces the use of a simple RRFCA (reduced-repulsion freeze-casting assembly) method for MXenes to manufacture three-dimensional porous pseudo-capacitor electrodes. By adding KOH solution to the MXene suspension, the problem of difficulty in freeze-drying assembly due to electrostatic repulsion between tablets is solved. The surface of Ti3C2Tx is modified with less electronegative hydroxyl groups, which enhances the interlayer bonding.



Literature link:
https://doi.org/10.1021/acsenergylett.0c00704


Source: MXene Frontie
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