Enhanced supercapacitor performance of a Cu-FeO/g-CN composite material: synthesis, characterization, and electrochemical analysis.

A Cu-doped FeO/g-CN composite, synthesized a straightforward hydrothermal process with controlled morphologies, represents a significant advancement in supercapacitor electrode materials. This study systematically analyzes the impact of Cu doping in FeO and its synergistic combination with g-CN to understand their influence on the electrochemical performance of the resulting composite, focusing on Cu doping in FeO rather than varying FeO/g-CN content. The comprehensive characterization of these composites involved a suite of physicochemical techniques.