Solution processable triarylamine-based polyamide for electrochromic supercapacitors and smart displays with energy...

Area of Science:

• Materials Science
• Electrochemistry
• Polymer Chemistry

Background:

• Electrochromic (EC) materials enable energy storage via ion insertion/desertion.
• Solution-processable EC polyamides are key for smart displays and EC supercapacitors.
• Monomer structure design critically impacts polyamide electrochemical performance.

Purpose of the Study:

• To synthesize and characterize a novel solution-processable EC polyamide (BDPA-CA).
• To investigate the influence of monomer structure on electrochemical properties.
• To elucidate the energy storage mechanism of the developed polyamide.

Main Methods:

• Synthesis of a triarylamine (TAA) diamine monomer via Ullmann reaction.
• Polycondensation reaction to form the BDPA-CA polyamide.
• Density functional theory (DFT) calculations to understand ion binding mechanisms.

Main Results:

• A propeller-shaped TAA diamine monomer resulted in a solution-processable polyamide (BDPA-CA).
• Incorporation of benzothiadiazole groups enhanced optical contrast during electrochemical oxidation.
• DFT calculations revealed dual active sites (S, O for Li+, N for ClO4-) for ion binding.

Conclusions:

• The designed BDPA-CA exhibits excellent potential for energy storage applications.
• The dual active sites contribute to increased capacitance in BDPA-CA film electrodes.
• Solution-processable EC polyamides with tailored monomer structures are promising for advanced energy storage devices.