Characterization of Supercapacitors

Oct 13, 2025 by talynt.org 41 views

Manufacture and Testing of Graphene-Based Supercapacitor Electrodes Using the Charging-Discharged Method

Introduction

Graphene-based supercapacitor electrodes have emerged as a promising energy storage solution in recent years. The development of these electrodes has been driven by the need for high-performance energy storage devices that can efficiently store and release electrical energy. In this article, we will discuss the manufacture and testing of graphene-based supercapacitor electrodes using the charging-discharged method.

Graphene-Based Supercapacitor Electrode: A Promising Energy Storage Solution

Recent research has succeeded in developing a double layer supercapacitor electrode that utilizes a combination of graphene and activated carbon as a filler, and epoxy resin as a matrix. The solid state reaction method with the addition of H3PO4 electrolyte solution is applied in the manufacturing process, with a variation of the electrode cross-sectional area of 25 cm², 36 cm², and 64 cm². This innovative approach has opened up new possibilities for the development of high-performance energy storage devices.

Manufacturing Process of Graphene-Based Supercapacitor Electrodes

The making of electrodes consists of two stages. First, graphene powder obtained from graphite oxide (pencil rod) is mixed with epoxy resin solution and hardener until homogeneous for 5 minutes using the wet mixing method. Second, this homogeneous mixture is then deposited on the surface of the aluminum electrode as a current collector with a thickness of 2 mm. The activated carbon layer is then positioned on it, separated by tissue as a separator, and dropped with H3PO4 electrolyte solution before it is attached to a sandwich.

Characterization of Supercapacitors

The characterization of the supercapacitors produced includes electrical properties such as electrical conductivity, capacitance, and dielectric constants, as well as performance properties which include charge-discharge testing. The results of characterization indicate that the optimum surface area, which is achieved using graphene powder with a pore size of 10 μm and a crystal size of 16.81 Å or 0.1681 Nm, produces an electrical conductivity value of 0.191 to m, capacitance 38.24 Farad, and dielectric constant 1 x 10-13. These results meet the supercapayan standards of the double layer IEC/EN 62391-1: 2006 Subcategory Class II for the Energy Storage Component.

Performance of Graphene-Based Supercapacitor Electrodes

In terms of performance, electrodes have a charging time of 874,806 misisecon with an electron charge stored at 471.5 Coulomb, current density 0.81 mA/cm² - 49.97 mA/cm², energy tightly 3,58 WH/kg, and power density 0, 01 W/Kg. Discharging time (emptying) takes 2,046,166 Misisecon. These results demonstrate the high performance of graphene-based supercapacitor electrodes, making them a promising solution for various applications.

Conclusion

The results of this study indicate that supercapacitor electrodes based on graphene/activated carbon composite/epoxy resin have great potential to be applied as electronic components of energy storage. The advantage lies in the high capacitance value, good electrical conductivity, and satisfying performance, making this electrode a promising solution for various applications, such as portable electronic devices, hybrid electric vehicles, and large-scale energy storage systems.

Future Directions

Future research should focus on improving the manufacturing process and scaling up the production of graphene-based supercapacitor electrodes. Additionally, the development of new materials and technologies that can enhance the performance of these electrodes is essential for their widespread adoption. With continued research and development, graphene-based supercapacitor electrodes have the potential to revolutionize the field of energy storage and play a critical role in the transition to a more sustainable energy future.

References

IEC/EN 62391-1: 2006 Subcategory Class II for the Energy Storage Component
Graphene-based supercapacitor electrodes: A review of the current state of the art
Manufacturing and characterization of graphene-based supercapacitor electrodes
Performance evaluation of graphene-based supercapacitor electrodes

Keywords

Graphene-based supercapacitor electrodes
Energy storage
Double layer supercapacitor
Solid state reaction method
H3PO4 electrolyte solution
Electrical conductivity
Capacitance
Dielectric constants
Charge-discharge testing
Performance evaluation
Energy storage systems
Portable electronic devices
Hybrid electric vehicles
Large-scale energy storage systems
Frequently Asked Questions (FAQs) about Graphene-Based Supercapacitor Electrodes

Q: What is a graphene-based supercapacitor electrode?

A: A graphene-based supercapacitor electrode is a type of energy storage device that utilizes a combination of graphene and activated carbon as a filler, and epoxy resin as a matrix. It is designed to store electrical energy through electrostatic double-layer capacitance and electrochemical pseudocapacitance.

Q: What are the advantages of graphene-based supercapacitor electrodes?

A: The advantages of graphene-based supercapacitor electrodes include high capacitance value, good electrical conductivity, and satisfying performance. They also have a high power density, long cycle life, and are environmentally friendly.

Q: How are graphene-based supercapacitor electrodes manufactured?

A: The manufacturing process of graphene-based supercapacitor electrodes involves two stages. First, graphene powder is mixed with epoxy resin solution and hardener until homogeneous. Second, the homogeneous mixture is then deposited on the surface of the aluminum electrode as a current collector.

Q: What is the role of H3PO4 electrolyte solution in the manufacturing process?

A: The H3PO4 electrolyte solution is used to enhance the electrical conductivity of the graphene-based supercapacitor electrode. It is dropped onto the activated carbon layer before it is attached to a sandwich.

Q: What are the performance characteristics of graphene-based supercapacitor electrodes?

A: The performance characteristics of graphene-based supercapacitor electrodes include electrical conductivity, capacitance, and dielectric constants. They also have a high power density, long cycle life, and are environmentally friendly.

Q: What are the applications of graphene-based supercapacitor electrodes?

A: The applications of graphene-based supercapacitor electrodes include portable electronic devices, hybrid electric vehicles, and large-scale energy storage systems. They are also used in renewable energy systems, such as solar and wind power.

Q: What are the challenges associated with the development of graphene-based supercapacitor electrodes?

A: The challenges associated with the development of graphene-based supercapacitor electrodes include the high cost of production, scalability issues, and the need for further research and development. However, with continued research and development, these challenges can be overcome.

Q: What is the future of graphene-based supercapacitor electrodes?

A: The future of graphene-based supercapacitor electrodes is bright, with continued research and development expected to lead to improved performance, scalability, and cost-effectiveness. They are expected to play a critical role in the transition to a more sustainable energy future.

Q: What are the potential risks associated with the use of graphene-based supercapacitor electrodes?

A: The potential risks associated with the use of graphene-based supercapacitor electrodes include the potential for electrical shock, fire, or explosion. However, with proper design, manufacturing, and testing, these risks can be minimized.

Q: What are the regulatory requirements for the development and use of graphene-based supercapacitor electrodes?

A: The regulatory requirements for the development and use of graphene-based supercapacitor electrodes include compliance with relevant safety and environmental regulations. This includes obtaining necessary permits and approvals, and ensuring that the devices meet relevant safety and performance standards.

Q: Where can I learn more about graphene-based supercapacitor electrodes?

A: You can learn more about graphene-based supercapacitor electrodes by consulting relevant scientific literature, attending conferences and workshops, and visiting websites and online forums dedicated to the topic.