Affordable Two-Dimensional Layered Cd(II) Coordination Polymer: High-Performance Pseudocapacitor Electrode Behavior.

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Pseudocapacitive materials are crucial for high-energy and high-power density storage.
• Challenges remain in material degradation, conductivity, cycling stability, and cost.

Purpose of the Study:

• To synthesize and characterize a novel cadmium(II)-based coordination polymer (Cd(DAB)).
• To evaluate the pseudocapacitive behavior and electrochemical performance of Cd(DAB) for supercapacitor applications.

Main Methods:

• Facile one-pot synthesis of Cd(DAB) from 3,3'-diaminobenzidine (DAB) and Cd(II) ions at room temperature.
• Structural characterization using spectroscopic and electron microscopic techniques.
• Electrochemical performance evaluation as an electrode material for supercapacitors.

Main Results:

• Cd(DAB) forms a 2D layered structure with high conductivity.
• Achieved a specific capacitance of 1341.6 F g⁻¹ at 20 A g⁻¹.
• Demonstrated long cycle life with 81% capacitance retention over 10,000 cycles.
• An asymmetrical supercapacitor device showed a specific capacitance of 428.5 F g⁻¹ at 1 A g⁻¹.

Conclusions:

• Cd(DAB) is a cost-effective and high-performance pseudocapacitive material.
• The material exhibits excellent energy storage capabilities and cycling stability.
• Cd(DAB) shows promise for next-generation supercapacitor devices.