Nickel manganite-based materials for electrochemical supercapacitors: An overview

Nickel manganite (NiMn2O4) based materials have enhanced electrochemical performance, which includes high specific capacity, high electrical conductivity, and remarkable cycling stability. This allows for higher energy and power densities. This makes NiMn2O4-based materials ideal for applications requiring efficient energy storage and a rapid charging-discharging rate, such as electric vehicles and portable electronics. Moreover, the relatively low cost and abundant availability of manganese and nickel might reduce overall device costs, which can help address concerns related to energy shortages and environmental issues. NiMn2O4-based electrodes also provide safety and environmental advantages over cobalt-based alternatives since they are less toxic and more thermally stable. This can improve safety and reduce the harmful environmental effects of producing battery-type supercapacitors. Additionally, the potential of NiMn2O4-based composite electrodes is investigated in order to develop high-performance NiMn2O4-based electrodes for the application of numerous innovative techniques. Chemical techniques range from the synthesis of unique nanostructures (NSs) and heterostructures to chemical modifications and integration with conductive NSs, which have large specific surface areas. The review offers an indepth examination of the innovative advancements in contemporary science related to the meticulously engineered electrodes. This energy storage mechanism, synthesis techniques, and relevant electrochemical properties of NiMn2O4-based electrodes are explored, such as enhanced performance with spinel NiMn2O4 electrode materials. In addition, the potential and obstacles of using NiMn2O4 core materials in supercapacitor electrode applications are addressed. Finally, potential avenues for future research in the synthesis of advanced NiMn2O4based electrode materials are outlined for the next generation of supercapacitors.