Designing Covalent Organic Frameworks with a Tailored Ionic Interface for Ion Transport across One-Dimensional...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Designing efficient ion transport pathways is crucial for advanced energy storage and conversion systems.
• Covalent organic frameworks (COFs) offer tunable porous structures but often face challenges in achieving high ion mobility.
• Controlling the interface between ions and the framework material is key to optimizing transport properties.

Purpose of the Study:

• To develop a novel strategy for ultrafast ion transport using engineered covalent organic frameworks.
• To systematically tune the ionic interface within COFs to understand its effect on ion mobility.
• To establish a quantitative correlation between ionic interface properties and ion transport rates.

Main Methods:

• Integrated electrolyte chains onto the pore surfaces of one-dimensional channels within COFs.
• Employed pore surface engineering to construct ionic frameworks with tunable interfaces.
• Quantitatively analyzed the relationship between interface composition/density and ion transport characteristics.

Main Results:

• Achieved systematic tuning of the ionic interface in COFs at desired compositions and densities.
• Demonstrated a quantitative correlation between the engineered ionic interface and ion transport.
• Observed an exponential increase in ion mobility with enhanced ionic interface properties.

Conclusions:

• The developed strategy provides a benchmark system for managing ionic interfaces in porous materials.
• Engineered ionic interfaces are critical for achieving high-rate ion transport in energy applications.
• This approach offers general guidance for designing advanced materials for energy conversion and storage systems.