In order to minimize the consumption of fossil fuels and reduce environmental pollution, some energy storage and conversion devices, such as batteries (such as lithium/sodium ion, lithium sulfur/air, zinc ion batteries, etc., as well as electric double layer capacitors (EDLCs) and pseudo capacitors ) Is a promising alternative. However, although the battery has a high energy density, the charge and discharge time is long, and the power density is low; the charge storage of the supercapacitor in the surface area is limited, and the energy density is low, but due to the fast charge and discharge speed, a higher power density can be obtained. Therefore, it is very necessary to combine the characteristics of the two to form a new type of composite supercapacitor energy storage device.

     Recently, the research group of Professor Wang Ning of University of Science and Technology Beijing published a research paper titled Integrated NiCo2-LDHs@MXene/rGO aerogel: Componential and structural engineering towards enhanced performance stability of hybrid supercapacitor in the well-known academic journal Chemical Engineering Journal.

Figure 1. NiCo2-LDHs@MXene/rGOaerogel synthesis process

Figure 2. NiCo2-LDHs@MXene/rGO aerogel SEM and TEM characterization.

Figure 3. NiCo2-LDHs@MXene/rGOaerogel XRD and XPS phase analysis.

Figure 4. NiCo2-LDHs@MXene/rGOaerogel three-electrode test results in 2M KOH electrolyte.

Figure 5. NiCo2-LDHs@MXene/rGO//MXene/rGO asymmetric capacitor device.

      In this work, a series of aerogels were prepared and combined with two-dimensional MXene, LDHs and reduced graphene oxide. As a battery electrode of a supercapacitor, NiCo2-LDHs@MXene/rGO aerogel has a specific capacity of 332.2 mAh g-1 at 1 Ag-1, and the capacity retention rate at 5 A g-1 after 5000 cycles It is 87.5%.

Literature link:

https://doi.org/10.1016/j.cej.2020.125197

Information source: MXene Frontie

This information is from the Internet for academic exchanges. If there is any infringement, please contact us and delete it immediately