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Updated: Jul 15, 2025

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Photo-Rechargeable Asymmetric Supercapacitors Exceeding Light-to-Charge Storage Efficiency over 21% under Indoor
Md Aftabuzzaman1, Masud1, Haoran Zhou1
1Department of Advanced Materials Chemistry, Korea University, 2511 Sejong-ro, Sejong, 30019, South Korea.
Researchers developed a novel dye-sensitized photo-rechargeable asymmetric supercapacitor (DSPC) using a porous carbon scaffold. This device achieves high light-to-charge storage efficiency, ideal for wireless power packs in portable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Renewable Energy
Background:
- Photo-rechargeable energy storage is crucial for Internet of Things (IoT) devices and portable electronics.
- Current limitations include low light-to-storage efficiency due to photovoltaic and energy storage system (ESS) incompatibility, especially under indoor lighting.
Purpose of the Study:
- To fabricate an integrated dye-sensitized photo-rechargeable asymmetric supercapacitor (DSPC) with enhanced light-to-charge storage efficiency.
- To develop a convenient fabrication process for wireless power packs.
Main Methods:
- Fabrication of a monolithic DSPC using a porous carbon scaffold with MnO-Mn3O4/C microspheres.
- Integration of dye-sensitized solar cell (DSSC) and supercapacitor functionalities.
- Development of a quasi-solid state (QSS) DSPC using a polymer gel electrolyte.
Main Results:
- The integrated DSPC exhibits a high areal specific capacitance of 281.9 mF cm⁻² at 0.01 mA cm⁻².
- Achieved a light-to-electrical conversion efficiency of 27.6% under 1000 lux CFL.
- Demonstrated a record light-to-charge storage efficiency of 21.6%.
- The QSS DSPC maintained high efficiency with improved cycling stability.
Conclusions:
- The developed DSPC offers a significant advancement in photo-rechargeable energy storage.
- The device demonstrates high performance and convenient fabrication for wireless power applications.
- This work paves the way for efficient indoor light energy harvesting and storage solutions.
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