Protein-Guided Biomimetic Calcification Constructing 3D Nitrogen-Rich Core-Shell Structures Realizing...

Area of Science:

• Materials Science
• Biochemistry
• Electrochemistry

Background:

• Biomimetic calcification mimics natural biomineralization using biomacromolecules to control inorganic mineral formation.
• Metal-organic frameworks (MOFs) are versatile materials with tunable properties.
• Lithium-sulfur batteries (LSBs) offer high theoretical energy density but suffer from polysulfide dissolution.

Purpose of the Study:

• To develop a protein-assisted biomimetic calcification method for in situ synthesis of nitrogen-doped MOF materials.
• To investigate the influence of proteins and organic ligands on MOF shell morphology.
• To evaluate the potential of these materials as sulfur hosts in LSBs.

Main Methods:

• Utilizing proteins as templates and guiding agents for MOF nucleation and shell growth.
• Controlling calcification nucleation to construct unique precursor structures.
• Carbonization of protein-containing precursors to create porous carbonaceous materials.
• Electrochemical testing to assess performance in LSBs.

Main Results:

• Successful synthesis of unique core-shell MOF structures using protein templates.
• Protein-containing precursors exhibit high porosity, stability, and nitrogen content after carbonization.
• Biomimetic calcification-assisted 3D carbonaceous structures effectively immobilize polysulfides.
• Demonstrated strong adsorption and catalytic capabilities for LSB applications.

Conclusions:

• Protein-assisted biomimetic calcification is a sustainable strategy for synthesizing advanced materials.
• The developed nitrogen-doped carbonaceous materials are promising sulfur hosts for high-performance LSBs.
• This approach offers new possibilities for materials science, catalysis, and energy storage.