Superstructured mesocrystals through multiple inherent molecular interactions for highly reversible sodium ion...

Area of Science:

• Materials Science
• Nanotechnology
• Chemistry

Background:

• Soft natural structures like DNA and proteins exhibit hierarchical organization via noncovalent interactions.
• Discovering new building blocks for long-range hierarchical structuring remains a challenge.

Purpose of the Study:

• To report the bottom-up synthesis of a hierarchical metal-phenolic mesocrystal.
• To investigate the self-assembly process on multiple length scales.
• To evaluate the performance of derived materials in sodium-ion batteries.

Main Methods:

• Bottom-up synthesis of metal-phenolic complexes.
• Spatiotemporal control of self-assembly into threads, filaments, and mesocrystals.
• Thermal conversion to metal-carbon hybrid frameworks.
• Electrochemical testing of sodium-ion battery performance.

Main Results:

• Hierarchical metal-phenolic mesocrystals were successfully synthesized.
• Self-assembly occurred across multiple length scales: complexes to threads, threads to filaments, filaments to mesocrystals.
• The hierarchical structures were stable after thermal conversion.
• The resulting metal-carbon hybrid framework demonstrated high performance in sodium-ion batteries (72.5 mAh/g at 200 A/g) with excellent capacity retention (90% over 15,000 cycles).

Conclusions:

• Hierarchical structuring of natural polyphenols is achievable through controlled self-assembly.
• These ordered structures are robust and can be converted into functional materials.
• The developed metal-carbon hybrid framework shows significant promise for high-performance sodium-ion battery applications.