Polydopamine/Melamine Sponge-Derived Compressible Carbon Foam for High-Performance Supercapacitors

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Flexible supercapacitors require deformable electrode materials, but creating porous carbons with such properties is difficult.
• Developing advanced electrode materials is crucial for enhancing the performance and applicability of flexible energy storage devices.

Purpose of the Study:

• To prepare a novel compressible carbon foam for high-performance flexible supercapacitors.
• To investigate the structural and electrochemical properties of the synthesized carbon material.

Main Methods:

• A polydopamine/melamine sponge (PDA/MS) was used as a precursor to create a compressible carbon foam.
• Cetyltrimethylammonium bromide and K2CO3 were employed as a template and activating agent, respectively, to control porosity.
• The resulting material (KDMC) was characterized for its surface area, compressibility, and electrochemical performance.

Main Results:

• The synthesized KDMC exhibited a 3D network architecture with excellent compressibility and a high specific surface area of ~2890.0 m²/g.
• KDMC demonstrated superior capacitive performance: 365.6 F/g specific capacitance, 86.6% capacitance retention from 0.5 to 10 A/g, and 1.9% capacitance loss after 10,000 cycles.
• A symmetric supercapacitor (KDMC//KDMC) assembled with a PVA/KOH gel electrolyte achieved an energy density of 10.44 Wh/kg.

Conclusions:

• A robust method for preparing compressible carbon electrode materials was successfully developed.
• The KDMC material shows significant potential for application in high-performance flexible supercapacitors.
• This research contributes to the advancement of deformable electrode materials for next-generation energy storage solutions.