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Related Experiment Video

Updated: Jan 29, 2026

Using Near-Infrared Spectroscopy Wearable Devices to Identify Central Versus Peripheral Limitations During Exercise
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All-Transparent Stretchable Electrochromic Supercapacitor Wearable Patch Device.

Tae Gwang Yun, Minkyu Park, Dong-Ha Kim

  • 1Advanced Nanosensor Research Center , KAIST Institute for Nanocentury , Daejeon 305-701 , Republic of Korea.

ACS Nano
|February 20, 2019
PubMed
Summary

This study presents a transparent, stretchable electrochromic supercapacitor with enhanced stability. The device maintains performance under mechanical strain and ambient exposure, offering a promising solution for flexible energy storage.

Keywords:
dual colorationelectrochromic supercapacitorhydrogel electrolytetransparent stretchablewearable patch device

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Energy Storage

Background:

  • Flexible and stretchable electrochromic supercapacitors are crucial for self-powered devices.
  • Conventional designs suffer from performance degradation due to environmental exposure and mechanical stress.

Purpose of the Study:

  • To develop an all-transparent, stretchable electrochromic supercapacitor with ultrastable performance.
  • To address the limitations of conventional flexible energy storage systems.

Main Methods:

  • Fabrication of a device using Au/Ag core-shell nanowire-embedded polydimethylsiloxane (PDMS), bistacked WO3 nanotube/PEDOT:PSS, and polyacrylamide (PAAm)-based hydrogel electrolyte.
  • Evaluation of device stability under ambient conditions and mechanical deformations (tensile and bending).
  • Assessment of electrochemical and electrochromic performance, including specific capacitance and coloration efficiency.

Main Results:

  • The Au/Ag nanowire-PDMS/PAAm hydrogel system prevented Ag oxidation and dehydration, maintaining conductivity for 16 days under ambient conditions and strain.
  • The WO3 nanotube/PEDOT:PSS active materials exhibited high electrochemical-electrochromic performance under mechanical stress.
  • Achieved a maximum specific capacitance of 471.0 F g⁻¹ with 92.9% retention after 50,000 cycles.
  • Demonstrated a high coloration efficiency of 83.9 cm² C⁻¹.

Conclusions:

  • The developed device offers superior stability and performance for flexible energy storage applications.
  • The novel material combination effectively mitigates degradation issues associated with mechanical strain and environmental exposure.
  • This work paves the way for robust, multifunctional transparent electronic devices.