What are the advantages and disadvantages of graphene-based materials?

In recent years, the demand for high-performance electrochemical energy storage devices has increased greatly, so many scholars have begun to invest in the development and research of more excellent electrode materials. Graphene-based materials have attracted a lot of attention in this regard. Graphene-based materials are seen as promising high-performance electrode materials that can improve the performance of existing devices and make the next generation of devices more practical.

Carbon materials are widely used in different energy storage equipment and play a very important role. However, due to the low density of porous carbon materials and nano carbon materials, the storage density of high carbon content electrode is always very low, resulting in low volume energy density.

Although graphene faces the same problem, or even worse, a controlled combination of graphene and electrode structure design can result in a high density graphene-based electrode. In addition, in many cases, the assembled integrated graphene-based electrodes do not contain any conductive agent or binder, thus further helping to increase the volume energy density.

Graphene-based materials are promising, and there are opportunities and challenges for graphene-based materials to be used as electrode materials

As a potential electrode material for electrochemical energy storage devices, graphene has many advantages over other traditional carbon materials and nano-carbon materials. With its stable physical structure, large specific surface area and good electrical conductivity, graphene is almost a perfect material for most electrochemical energy storage devices.

In addition, graphene output performance has also made many remarkable progress: the use of two-dimensional layered structure can be constructed into a variety of three-dimensional structures, but also with adjustable pore structure. In this paper, we reviewed the applications of graphene-based materials in liquid lithium ion batteries, lithium sulfur batteries, lithium oxygen batteries, NIB and SC. We found that applying graphene to these devices can significantly improve their performance.

Several notable advantages of graphene are as follows:

1. Graphene is a favorable carbon substrate when applied to non-carbon materials. Its easy application and large specific surface area make it easier to hybridize and evenly distribute other active components on its surface, which greatly improves the utilization rate of these components. In addition, it is easy to use graphene to build an interconnected conductive network between two active particles or even the entire electrode. Such a network helps to improve the stability of the electrode circulation.

2. High volume energy density can be achieved by using graphene instead of traditional carbon materials in the device. Graphene provides a potential solution for assembly of high volume energy density devices.

3. Flexible graphene is expected to produce flexible energy storage devices. Using graphene and its components, highly flexible collector fluids can be prepared, providing us with a method to replace brittle metal collector fluids. In addition, an integrated flexible electrode can be prepared by using graphene, which helps to solve the problem of separation of fluid-collecting active materials in the process of repeated bending.

In addition to the above, graphene has a variety of superior properties compared to traditional carbon materials, which may help promote the practical application of various new battery systems. High-energy room-temperature sodium-sulfur batteries use carbon/sulfur composites as electrodes, according to a recent study. We can expect graphene to further improve the performance of such batteries. It has also been found that graphene-based composites can be used as a highly efficient electrocatalyst for zinc-air batteries. Based on these results, it is not hard to see the great potential of graphene in future energy storage applications.

Although graphene-based materials have many advantages in the application of electrochemical energy storage devices (EESDs), their practical applications have not been fully realized, and there are still some serious problems. It is these urgent problems that cause graphene-based materials to be hindered in many practical applications. To solve the existing challenges, more efforts should be made through theoretical calculation and experimental research. It is believed that in the next few years, further breakthroughs will be made in the practical application of graphene-based materials, and revolutionary progress will be achieved in energy storage devices.

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