Particuology｜Multi-ion intercalation of Ti₃C₂Tx MXene

North Konami can provide multi-ion intercalation of Ti₃C₂Tx MXene (can be customized)

Research abstract

Intercalation ions between adjacent layers of MXene can change the interlayer environment and have an impact on the electrochemical ion storage capacity. To further explore the relationship between the multi-ion effect of MXene layer confinement and electrochemical energy storage, Co2+, Mn2+ and Ni2+ were intercalated into Al3+ pre-intercalated MXene through a spontaneous process. Based on the shift of the (002) plane orientation, it is found that the intercalated polyions can regulate the interlayer environment of MXenes through stress, thereby inducing lattice shrinkage on the c-axis. Considering the mechanism-performance relationship of ion storage, the occupancy of multiple ions in the interlayer space of MXene can affect the electrochemical performance. This work provides new insights into the relationship between polyions and MXenes. The work was published in the journal Particuology by the research team of Shichong Xu and Lu Ming of Jilin Normal University and Prof. Zhang Bingsen from Shenyang Institute of Metal Research, Chinese Academy of Sciences.

Graphical guide

Figure 1. Schematic diagram of the multi-ion intercalation process of the Ti3C2Tx layer.


Figure 2. XRD patterns and (002) peak shift, Williamson-Hall analysis of Al3+ pre-intercalated Ti3C2Tx with different ions intercalated.


Figure 3. SEM and EDX images of Al3+ pre-intercalated Ti3C2Tx with different ion intercalation.


Figure 4. Raman, IR, and high-resolution XPS spectra of multi-ion intercalated Ti3C2Tx MXene.





Figure 5. Electrochemical performance test and AC impedance.



Summarize

Within the confined space of the adjacent layers of the MXene, multiple ions are successfully intercalated into the Al ion-pre-intercalated Ti3C2Tx MXene through electrostatic interactions. Intercalation of these ions preserves the 2D features of MXenes and provides a new approach for the modulation of the interlayer environment at the atomic level. The existence of multiple ions between the MXene layers can form steric hindrance and electrostatic potential barriers to transport and store electrolyte ions. Exploring the relationship between polyions and MXene can provide guidance for the design of intercalated electrodes.


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Literature link

https://doi.org/10.1016/j.partic.2022.02.006

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