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Updated: Jun 23, 2025

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MXene-based all-solid flexible electrochromic microsupercapacitor.

Shanlu Guo1, Ruihe Zhu1, Jingwei Chen2

  • 1College of Electronic and Optical Engineering & College of Flexible Electronics (Future Technology), Nanjing University of Posts and Telecommunications, Nanjing, 210023 China.

Microsystems & Nanoengineering
|June 26, 2024
PubMed
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This summary is machine-generated.

Researchers developed a flexible MXene microsupercapacitor with a color-changing electrolyte. This device offers fast switching, high energy storage, and excellent durability for wearable electronics.

Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Flexible optoelectronic devices require integrated energy storage and display capabilities.
  • Achieving high capacitance, rapid color switching, and broad optical modulation simultaneously is a significant challenge.

Purpose of the Study:

  • To fabricate a flexible MXene-based microsupercapacitor with electrochromic properties.
  • To enhance energy storage performance and optical modulation through electrolyte modification.

Main Methods:

  • Fabrication of an in-plane microsupercapacitor using MXene via mask-assisted spray coating.
  • Incorporation of ethyl viologen dibromide (EVB) as an electrochromic additive in the electrolyte.

Main Results:

Keywords:
Micro-optics

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  • The device demonstrated a fast color switching time (2.6 s coloration, 2.5 s bleaching) and a 60% optical contrast.
  • The addition of EVB extended the working voltage to 1 V and improved energy storage, yielding an areal capacitance of 12.5 mF cm⁻².
  • The flexible device maintained 100% capacitance after 100 bending cycles, showing superior mechanical stability.

Conclusions:

  • The MXene-based flexible microsupercapacitor with EVB offers a promising platform for multifunctional optoelectronic applications.
  • The integrated energy storage and electrochromic functionalities are suitable for wearable electronics, camouflage, and displays.