Polypyrrole-MXene coated textile-based flexible energy storage device.

Area of Science:

• Materials Science
• Electrochemistry
• Energy Storage

Background:

• Flexible electrochemical energy storage devices are crucial for portable and wearable electronics.
• Supercapacitors (SCs) offer high specific capacitance and power density but often rely on traditional electrode materials.
• Developing novel electrode materials for advanced flexible SCs is an ongoing research area.

Purpose of the Study:

• To fabricate flexible supercapacitors using MXene-based textile electrodes.
• To enhance the capacitive performance of MXene electrodes through polypyrrole deposition.
• To evaluate the energy storage capabilities of the developed MXene-PPy textile supercapacitors.

Main Methods:

• Fabrication of conductive textile electrodes using MXene nanosheets via a "dipping and drying" method.
• Electrochemical deposition of polypyrrole (PPy) onto MXene textiles to create PPy-MXene electrodes.
• Assembly and testing of a symmetrical solid-state supercapacitor using the PPy-MXene textile electrodes.

Main Results:

• MXene textile electrodes exhibited a specific capacitance of 182.70 F g^-1.
• PPy-MXene coated textile electrodes achieved a significantly higher specific capacitance of 343.20 F g^-1.
• The assembled solid-state supercapacitor demonstrated an energy density of 1.30 mW h g^-1 at a power density of 41.1 mW g^-1.

Conclusions:

• MXene-based textiles are effective electrode materials for flexible supercapacitors.
• Polypyrrole coating enhances the capacitive performance of MXene electrodes.
• The developed MXene-PPy textile supercapacitors show potential for next-generation wearable energy storage devices.