Rare-Earth-Based Metal-Organic Frameworks for Electrochemical Energy Applications: Current Status and Emerging...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Rare-earth-based metal-organic frameworks (RE-MOFs) are emerging functional materials.
• Rare-earth ions possess unique coordination chemistry (high coordination numbers, shielded 4f electrons, Lewis acidity, redox states) enabling stable frameworks, redox functionality, and reactivity.

Purpose of the Study:

• To comprehensively review recent advances in RE-MOF applications for electrochemical energy storage and conversion.
• To elucidate the fundamental coordination chemistry of rare-earth ions and its relation to electrochemical functionality.
• To discuss design strategies, challenges, and future research directions for RE-MOFs.

Main Methods:

• Literature review of recent advances in RE-MOF research.
• Elucidation of rare-earth ion coordination chemistry.
• Analysis of design strategies (framework engineering, composite construction, thermal transformation).
• Assessment of challenges (mechanistic ambiguities, conductivity, scalability, sustainability).

Main Results:

• RE-MOFs exhibit exceptional framework stability, distinct redox functionality, and enhanced interfacial reactivity due to rare-earth ion properties.
• Design strategies like framework engineering and composite construction are crucial for optimizing performance.
• Key challenges include limited conductivity, scalability, and sustainability concerns.

Conclusions:

• RE-MOFs hold significant promise for batteries, supercapacitors, and electrocatalysis.
• Future research should focus on advanced characterization, AI-driven discovery, exploring the lanthanide series, and sustainable synthesis.
• Rational design and practical implementation are key for advancing RE-MOFs in sustainable electrochemical energy technologies.