Layered double hydroxide-based electrode materials derived from metal-organic frameworks: synthesis and applications...

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Metal-organic frameworks (MOFs) show potential as supercapacitor (SC) electrode materials due to their porosity and tunability.
• Key limitations of MOFs for SCs include low electrical conductivity and poor cycling stability.
• Layered double hydroxides (LDHs) offer improved electrochemical properties but can suffer from aggregation.

Purpose of the Study:

• To introduce synthesis strategies for converting MOFs into LDHs for enhanced supercapacitor applications.
• To review recent advancements in MOF-derived LDHs as electrode materials for supercapacitors.
• To discuss challenges and future directions for MOF-derived LDH electrode materials.

Main Methods:

• Utilizing MOFs as templates or precursors for the synthesis of LDHs.
• Characterizing the structural and electrochemical properties of the resulting MOF-derived LDHs.
• Overviewing research on pristine LDH powders, LDH composites, and LDH-based arrays derived from MOFs.

Main Results:

• MOF-derived LDHs exhibit enhanced stability, electrical conductivity, and mass transport compared to pristine MOFs.
• The MOF-derived LDH structure prevents aggregation and facilitates active site dispersion.
• Various forms of MOF-derived LDHs (powders, composites, arrays) demonstrate promising performance in supercapacitors.

Conclusions:

• Converting MOFs into LDHs is an effective strategy to overcome the limitations of MOFs in supercapacitor electrodes.
• MOF-derived LDHs offer a promising pathway for developing high-performance supercapacitor materials.
• Further research is needed to address existing challenges and optimize MOF-derived LDH electrode materials.