MXenes as a versatile platform for reactive surface modification and superior sodium-ion storages

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Two-dimensional (2D) MXenes possess large surface areas and tunable properties, making them promising for hybrid materials and sodium-ion storage (SIS).
• Surface modification of MXenes can significantly enhance sodium-ion adsorption, intercalation, and migration, crucial for efficient SIS.
• Reactive surface modification (RSM) is a novel strategy to tailor MXene surfaces for improved electrochemical performance.

Purpose of the Study:

• To introduce and illustrate the reactive surface modification (RSM) strategy for 2D MXenes.
• To summarize recent advances in SIS performance of MXenes and their derivatives obtained via RSM.
• To emphasize the relationship between MXene surface chemistry and sodium-ion storage mechanisms.

Main Methods:

• Summarizing intrinsic surface chemistries and physicochemical properties of MXenes.
• Analyzing the impact of surface modification on Na-ion adsorption, intercalation, and migration.
• Reviewing SIS properties of MXenes and RSM-derived hybrids.

Main Results:

• RSM effectively modifies MXene surfaces, facilitating improved Na-ion dynamics.
• MXene-based hybrids derived from RSM demonstrate enhanced SIS performance.
• Surface characteristics are intrinsically linked to Na-ion storage capabilities.

Conclusions:

• RSM is a viable strategy for developing high-performance MXene-based sodium-ion storage materials.
• Understanding surface-property-performance relationships is key for optimizing MXene derivatives.
• Further research into RSM MXene-based hybrids holds promise for future energy storage solutions.