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All Two-Dimensional Pseudocapacitive Sheet Materials for Flexible Asymmetric Solid-State Planar Microsupercapacitors
Fangfang Zhao1, Weihong Liu1, Tianlun Qiu1
1College of Chemistry, Chemical Engineering and Materials Science , Soochow University , Suzhou 215123 , China.
ACS Nano
|December 13, 2019
Summary
Researchers developed a flexible microsupercapacitor using manganese oxide and titanium carbide sheets. This device offers high energy density and stable performance for wearable electronics.
Area of Science:
- Materials Science
- Electrochemistry
- Energy Storage
Background:
- Miniaturized energy storage is crucial for portable electronics.
- In-plane microsupercapacitors face limitations due to low energy density.
Purpose of the Study:
- To develop a high-performance flexible microsupercapacitor with enhanced energy density.
- To utilize complementary pseudocapacitive materials for improved electrochemical performance.
Main Methods:
- Assembled a flexible asymmetric interdigitated solid-state microsupercapacitor.
- Employed two-dimensional sheets of manganese oxide (MnO2) and titanium carbide (Ti3C2).
- Utilized a gel electrolyte for device operation.
Main Results:
- Achieved a specific capacitance of 106 F g⁻¹ (295 mF cm⁻²).
- Demonstrated a wide potential window of 2 V and excellent rate performance (83% retention at 20 A g⁻¹).
- Reported high energy density (58 Wh kg⁻¹) and power density (985 W kg⁻¹), stable under bending.
Conclusions:
- Two-dimensional pseudocapacitive sheet materials show significant potential for flexible and wearable devices.
- The designed microsupercapacitor offers a promising solution for advanced energy storage applications.
- Complementary voltage window operation enhances device performance and stability.
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