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Conformable Wearable Electrodes: From Fabrication to Electrophysiological Assessment

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Flexible wearable MXene Ti₃C₂-Based power patch running on sweat.

Jayraj V Vaghasiya¹, Carmen C Mayorga-Martinez¹, Jan Vyskočil¹

¹Center for Advanced Functional Nanorobots, Department of Inorganic Chemistry, Faculty of Chemical Technology, University of Chemistry and Technology Prague, Technická 5, 166 28, Prague, Czech Republic.

Biosensors & Bioelectronics

|February 26, 2022

Summary

Researchers developed a flexible supercapacitor using MXene and polypyrrole for wearable electronics. This biocompatible device utilizes sweat as an electrolyte, demonstrating excellent performance for powering gadgets during exercise.

Keywords:

2D materials Biofluid Flexible supercapacitor Healthcare Portable power source Wearable bioelectronics

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Area of Science:

Materials Science
Electrochemistry
Wearable Technology

Background:

Flexible supercapacitors (FSCs) are crucial for portable power in wearable electronics.
Biocompatibility of materials in wearable FSCs is an emerging research area.
Need for sustainable and readily available electrolytes for wearable devices.

Purpose of the Study:

To develop a biocompatible wearable flexible supercapacitor (FSC).
To utilize sweat as a sustainable electrolyte for the FSC.
To evaluate the electrochemical performance and real-world applicability of the developed FSC.

Main Methods:

Fabrication of a wearable FSC using MXene Ti3C2 nanosheets and polypyrrole-carboxymethylcellulose nanospheres composite (Ti3C2@PPy-CMC) as electrode material.
Electrochemical performance analysis using artificial sweat.
Development and testing of a sweat-chargeable FSC patch for powering portable electronics during exercise.

Main Results:

The Ti3C2@PPy-CMC based FSC demonstrated excellent specific capacitance, power density, cycling stability, and bending stability.
The FSC patch showed effective power delivery when applied to different body regions with varying sweat secretion.
The composite material exhibited promising biocompatibility for wearable energy storage applications.

Conclusions:

The developed Ti3C2@PPy-CMC based wearable FSC shows high potential for next-generation portable power sources.
Utilizing sweat as an electrolyte offers a sustainable and biocompatible approach for wearable energy storage.
The sweat-chargeable FSC patch is a viable solution for powering electronic devices during physical activity.