One-Dimensional π-d Conjugated Coordination Polymer Intercalated MXene Compound for High-Performance Supercapacitor...

Area of Science:

• Materials Science
• Electrochemistry
• Nanotechnology

Background:

• MXenes offer high conductivity and electrochemical activity for supercapacitors.
• MXene self-restacking hinders their full potential in energy storage devices.
• Effective interlayer design is crucial to mitigate restacking and enhance performance.

Purpose of the Study:

• To design a novel MXene interlayer using a 1D conjugated coordination polymer (Ni-BTA).
• To investigate the synergistic effects of Ni-BTA intercalation on Ti3C2Tx MXene for supercapacitors.
• To develop a highly efficient and stable supercapacitor electrode material.

Main Methods:

• Direct synthesis of Ni-BTA on Ti3C2Tx nanosheets.
• Fabrication of Ni-BTA/MXene composite films for supercapacitor electrodes.
• Electrochemical characterization including rate performance and cycling stability tests.

Main Results:

• Uniform intercalation of Ni-BTA within Ti3C2Tx nanosheets.
• Ni-BTA facilitated charge transport and pseudocapacitive activity.
• Achieved gravimetric specific capacitance of 264.4 F g⁻¹ at 5 mV s⁻¹.
• Demonstrated excellent cycling stability with 94.6% capacitance retention after 10,000 cycles.

Conclusions:

• Ni-BTA/MXene composite electrodes effectively suppress MXene restacking.
• The intercalated Ni-BTA enhances both conductivity and pseudocapacitance.
• This study presents a promising strategy for designing robust and high-performance supercapacitors.