Arylamine-Linked 2D Covalent Organic Frameworks for Efficient Pseudocapacitive Energy Storage

Area of Science:

• Materials Science
• Chemistry
• Energy Storage

Background:

• Covalent organic frameworks (COFs) offer tunable properties through diverse linkages.
• Functional linkages enhance COFs beyond basic building units, enabling tailored functionalities.
• Arylamine linkages represent a novel approach to COF structural and functional diversification.

Purpose of the Study:

• To introduce a new arylamine linkage for COF synthesis.
• To construct and characterize novel arylamine-linked COFs (AAm-TPB and AAm-Py).
• To evaluate the pseudocapacitive energy storage performance of the synthesized COFs.

Main Methods:

• Synthesis of two new arylamine-linked COFs (AAm-TPB, AAm-Py) via condensation reactions.
• Utilizing dimethyl succinyl succinate (DMSS) and multitopic amines (TPB-NH2, Py-NH2) as precursors.
• Electrochemical characterization using a three-electrode setup to assess pseudocapacitive performance.

Main Results:

• Successful preparation of AAm-TPB and AAm-Py COFs incorporating arylamine linkages.
• AAm-TPB exhibits significant pseudocapacitive behavior due to diphenylamine moieties.
• AAm-TPB achieved a high capacitance of 271 F/g at 1 A/g, demonstrating excellent energy storage capability.

Conclusions:

• The developed arylamine linkage effectively diversifies COF structures and properties.
• AAm-TPB shows promising potential as a high-performance electrode material for pseudocapacitive energy storage.
• This work expands the scope of COF applications in advanced energy storage systems.