Enhancing supercapacitor performance: The Influence of doping in spinel ferrite materials

Abstract

Strategic doping of ferrite materials in supercapacitors can improve their performance due to their unique electrochemical stability and versatile properties. This paper reviews the effects of doping on the performance of ferrite-based supercapacitors with emphasis on the ways in which certain elements such as transition metals, rare earth metals among others can increase specific capacitance, energy density and cyclic stability in ferrite electrodes. Through the addition of alloying materials in the structure of ferrites, their crystal structure, electronic conductivity, and surface properties are changed which leads to improved electrochemical performance. Apart from alloying techniques, the method of synthesis of ferrite-based materials plays a significant role in determining their overall performance. Environmentally friendly synthesizing methods employed in the production of ferrite nanomaterials have attracted much attention due to their reduced environmental impact and economical benefits. Such means offer a green alternative to the production of ferrites in comparison with the conventional methods, sometimes even maintaining or improving their electrochemical performance. The integration of hybrid energy storage systems, which combine high energy storage capacity of batteries with the fast power delivery of supercapacitors is also discussed. There is current research on the use of ferrite-based materials together with carbon nanomaterials to provide versatile solutions for various energy storage applications. Finally, this review emphasizes the need for further research in optimizing alloying strategies for ferrites, improving scalability, and understanding the environmental and economic aspects of their synthesis. Integrating ferrite-based supercapacitors into next-generation energy storage systems could provide a sustainable and widely used alternative for a wide range of global energy needs.