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Updated: Mar 15, 2026

Evaluating the Electrochemical Properties of Supercapacitors using the Three-Electrode System
Published on: January 7, 2022
Wearable Solid-State Supercapacitors Operating at High Working Voltage with a Flexible Nanocomposite Electrode
Xiaoyan Li1,2, Jun Wang1, Yaping Zhao1
1College of Chemistry, Chemical Engineering and Biotechnology, and Key Laboratory of Science & Technology of Eco-Textile, Ministry of Education, Donghua University , Shanghai 201620, P.R. China.
Researchers developed ultralight, flexible electrodes for wearable supercapacitors using carbon nanofibers, nanotubes, and MnO2. These self-sustained devices offer high energy and power density for portable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Nanotechnology
Background:
- Development of advanced energy storage solutions for portable electronics is crucial.
- Flexible and lightweight electrodes are needed for wearable devices.
- Carbon-based nanomaterials offer unique electrochemical properties.
Purpose of the Study:
- To fabricate ultralight, self-sustained electrodes for wearable supercapacitors.
- To integrate carbon nanofibers, amino-modified multiwalled carbon nanotubes (AM-MWNT), and MnO2 nanoflakes.
- To evaluate the electrochemical performance of the fabricated electrodes and assembled supercapacitors.
Main Methods:
- Fabrication of freestanding electrodes via structural integration of carbon nanofibers, AM-MWNT, and MnO2 nanoflakes.
- Utilizing terephthalic acid (PTA) sublimation during carbonization for high porosity and flexibility.
- Assembly of wearable symmetric solid-state supercapacitors with LiCl/PVA gel electrolyte.
Main Results:
- Achieved freestanding electrodes with high porosity and flexibility without polymer substrates.
- Wearable supercapacitors demonstrated a maximum energy density of 44.57 Wh/kg and a power density of 13330 W/kg.
- Operated at a high working voltage of 1.8 V with excellent electrochemical cyclability.
Conclusions:
- The developed wearable supercapacitors possess a favorable combination of flexibility, high energy density, and cyclability.
- The wide potential window and performance make them suitable for next-generation portable electric devices.
- This approach offers a promising pathway for advanced energy storage in wearable technology.
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