Cyclotrimerization Polymers as Precursors for Tailored Porous Carbons and Application in Supercapacitors.

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Chemistry

Background:

• Porous carbon materials are crucial for electric double-layer capacitor (EDLC) electrodes due to their high surface area, conductivity, and stability.
• Synthetic polymers offer molecular-level control for tailoring carbon precursor properties, enhancing electrochemical performance.

Purpose of the Study:

• To investigate the relationship between synthetic polymer precursor structure and the resulting porous carbon properties.
• To understand how precursor molecular framework and conjugation affect graphitization and porosity in carbon materials for EDLCs.

Main Methods:

• Synthesis of highly conjugated polymeric frameworks via triple aldol condensation of diacetyl-containing compounds (2,2'-diacetylbiphenyl, 4,4'-diacetylbiphenyl, 1,4-diacetylbenzene).
• High-temperature pyrolysis of polymeric precursors to yield carbon materials.
• Analysis of the correlation between precursor structure, carbonization temperature, graphitization degree, and porosity.

Main Results:

• Precursor structure significantly impacts porosity, with differences in molecular architecture directly reflected in the final carbon materials.
• At lower carbonization temperatures, precursor conjugation and framework rigidity influence graphitic ordering.
• Higher temperatures involve factors like molecular mobility and volatile release in controlling graphitization.

Conclusions:

• Precursor design is critical for tailoring the porosity of carbon materials for EDLC applications.
• Carbonization temperature remains the primary factor governing the graphitization of these porous carbon materials.