Cutting-edge advancements in HOFs-derived materials for energy storage supercapacitor application

Organic frameworks coupled with hydrogen bonds known as Hydrogen bonded organic frameworks (HOFs) emerged as materials with great potential in the fabrication of supercapacitors based on their structural and chemical characteristics. HOFs are crystalline porous materials where arrays of hydrogen bonding form highly stable frameworks with tunable porosity. These frameworks possess several benefits for the application of supercapacitor electrodes with high surface area, chemical flexibility and potential facile functionalization. The synthesis, characterization, organic building blocks at creation, hydrogen bonding motifs and applications of HOFs in supercapacitors are the main topics of this paper. These methods include solvothermal synthesis, mechano-chemical methods and self-assembly processes, where the specific features of HOFs in terms of their porosity and surface functionality enhance the electrochemical performance such as specific capacitance, cycling stability, power density and energy density. Hence, the large surface area and the efficient charge storage ability are exhibited by H-bonded networks. The porosity and functional groups facilitate accurate and rapid ion conduction and enable better access to the electrolytes, resulting in enhanced battery rate performance and energy density. Furthermore, the tendency for hydrogen bond formation depicts robust cycling performance because of the structural integrity during the charge-discharge cycling. This review extends an evaluation of possible further developments in supercapacitors, with emphasis on combined HOFs and composite electrode materials like conductive polymers, carbon-based materials and metal oxides, that reveal synergistic effects in improved impact on conductivity, capacitance and performance. Thus, the HOFs are identified as versatile materials with high potential for use in supercapacitors because of their adjustable characteristics and high electrochemical activity. Research on hybrid materials will be of paramount importance in achieving future enhancement of supercapacitor technology due to the increasing global need for effective energy storage systems.