Conductive Microporous Covalent Triazine-Based Framework for High-Performance Electrochemical Capacitive Energy...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• Supercapacitors require advanced electrode materials with high specific surface area (SSA) and nitrogen doping.
• Existing materials like nanocarbon, graphene, and conductive polymers have limitations in achieving both high SSA and nitrogen content simultaneously.

Purpose of the Study:

• To develop novel electrode materials for supercapacitors with enhanced performance.
• To synthesize nitrogen-enriched porous nanocarbon structures with high SSA and nitrogen doping concentration.

Main Methods:

• Synthesis of tetracyanoquinodimethane-derived conductive microporous covalent triazine-based frameworks (TCNQ-CTFs).
• Characterization of TCNQ-CTFs for nitrogen content and SSA.
• Electrochemical testing of TCNQ-CTFs as electrode materials in supercapacitors.

Main Results:

• Achieved high nitrogen content (>8%) and large SSA (>3600 m² g⁻¹).
• Exhibited excellent specific capacitances exceeding 380 F g⁻¹.
• Demonstrated considerable energy density (42.8 Wh kg⁻¹) and remarkable cycling stability (no degradation after 10,000 cycles).

Conclusions:

• TCNQ-CTFs represent a promising class of materials for high-performance supercapacitors.
• The developed materials overcome limitations of existing electrode materials by combining high SSA and nitrogen doping.
• These CTFs hold significant potential for advanced electrochemical energy storage systems.