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A Visual and Electric Dual-Mode Flexible Electrochromic Perception Device with Semiquantitative Monitoring for Human
Dashui Zhang1,2, Zhiye Hou1,2, Wenqing Chai1,2
1Guangxi Key Laboratory of Petrochemical Resource Processing and Process Intensification Technology, School of Chemistry and Chemical Engineering, Guangxi University, Nanning 530004, China.
ACS Applied Materials & Interfaces
|February 12, 2026
Summary
This study introduces a new flexible device for monitoring human motion using both visual color changes and electrical signals. This dual-mode approach offers intuitive and accurate tracking of movements like finger bending and joint motion.
Area of Science:
- Materials Science
- Wearable Technology
- Biomedical Engineering
Background:
- Wearable perception devices struggle with nonintuitive human motion signal monitoring.
- Existing devices face challenges in dual-mode monitoring and durability.
Purpose of the Study:
- To develop a flexible electrochromic perception device for semiquantitative visual and electrical dual-mode monitoring of human motion pressure.
- To enhance functionality and user experience in wearable motion-sensing technology.
Main Methods:
- Assembly of a novel flexible electrochromic device using Li+-doped hybrid hydrogel as an electrolyte.
- Optimization of energy dissipation, electrochemical stability, and color switching properties.
- Utilizing finite element method simulations to understand the perception mechanism.
Main Results:
- The device achieved excellent electrochromic stability and reliable electrical signal monitoring.
- Demonstrated semiquantitative monitoring of relative capacitance and color switching (green/transparent) during finger bending, thigh joint movement, and plantar pressure at 0.6 V.
- Successfully monitored microjoint movement via relative resistance changes and relative capacitance under various bending angles.
Conclusions:
- The developed device offers a novel strategy for intuitive and accurate flexible perception of human motion.
- Provides significant prospects for advancing wearable human motion monitoring systems.
- Highlights the potential of Li+-doped hybrid hydrogels in optimizing device performance.
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