Modulation engineering of 2D MXene-based compounds for metal-ion batteries

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Rechargeable metal-ion batteries (MIBs) require advanced electrode materials.
• Two-dimensional (2D) transition metal carbides/nitrides (MXenes) offer excellent conductivity and surface area for MIB electrodes.
• Challenges include uncontrollable surface functionalization, interlayer restacking, and collapse in traditional MXenes.

Purpose of the Study:

• To summarize recent developments in modulating 2D MXene-based transition-metal compounds for improved electrochemical performance.
• To highlight strategies for modifying existing MXenes and designing novel compounds.
• To present future challenges and perspectives in MXene-based materials research.

Main Methods:

• Reviewing recent literature on MXene modification techniques.
• Discussing intercalation, surface decoration, and heterostructure construction for MXenes.
• Examining the design of novel transition-metal compounds beyond MXenes through precise atomic control.

Main Results:

• Effective strategies for modifying traditional MXenes have been identified.
• Novel transition-metal compounds beyond MXenes can be designed by controlling atomic structure, proportions, and composition.
• These modifications address limitations like restacking and functionalization issues.

Conclusions:

• Modulation engineering of 2D MXene-based compounds is crucial for advancing MIB technology.
• Further research is needed to overcome critical challenges and unlock the full potential of these materials.
• Precisely engineered MXenes and novel compounds promise enhanced electrochemical performance for next-generation batteries.