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Achieving enhanced multifunctional performance for structural composite supercapacitors by reinforcing interfaces

Xu Liu¹, Jianxun Li¹, Yuehua Liu¹

¹School of System Design and Intelligent Manufacturing, Southern University of Science and Technology, Shen Zhen, 518055, China; Shenzhen Key Laboratory of Intelligent Manufacturing for Continuous Carbon Fiber Reinforced Composites, Southern University of Science and Technology, Shenzhen 518055, China.

Journal of Colloid and Interface Science

|March 29, 2024

Summary

Researchers developed a polymer coating for structural composite supercapacitors, enhancing their mechanical strength and electrochemical performance for applications in electric vehicles and drones. This innovation improves energy storage and structural integrity simultaneously.

Keywords:

Carbon fiber composite Energy storage Interface stability Mechanical properties Structural composite supercapacitor

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Area of Science:

Materials Science
Electrochemistry
Mechanical Engineering

Background:

Structural composite supercapacitors offer dual functionality for energy storage and mechanical load-bearing.
Applications in electric vehicles, drones, and aircraft demand robust and efficient energy storage solutions.

Purpose of the Study:

To enhance the adhesion and stability of electrode materials in carbon fiber structural composite supercapacitors.
To improve the electrochemical and mechanical properties of zinc-ion supercapacitors through interface engineering.

Main Methods:

Development of a polymer-based coating at the electrode/electrolyte interface.
Fabrication of a structural composite zinc-ion supercapacitor (SZSC) using carbon fiber@active carbon-P (CF@AC-P) cathode, ionogel electrolyte, and Zn anode.
Mechanical testing, physical characterization, and electrochemical performance evaluation, including cyclic stability and energy/power density measurements.
Utilizing vacuum infusion techniques for fabricating 3D structural composite components.

Main Results:

The polymer coating significantly improved adhesion and stability under mechanical stress.
The optimized SZSC achieved a maximum energy density of 164.6 mWh kg⁻¹ at 563.3 mW kg⁻¹.
The device demonstrated over 8000 cycles of stable operation without capacity degradation.
The optimized SZSC exhibited a tensile strength of 399.7 MPa and Young's modulus of 11.5 GPa.
Fabricated 3D structural composite components showed exceptional electrochemical performance.

Conclusions:

The polymer coating is a practical and effective interface engineering approach for developing multifunctional structural devices.
The developed structural composite supercapacitors exhibit promising electrochemical and mechanical properties for advanced applications.
This research validates the potential of 3D multifunctional composites in structural energy storage systems.