Metallurgical synthesis and physicochemical characterization of perovskite/g-CN nanocomposites for advanced electrochemical applications

초록

The growing demand for energy and quick exhaustion of fossil fuels has enforced the scientist to find renewable and high performance energy storage systems. Supercapacitors (SCs) are most promising storage devices with good power density and storage capacity. Here, a CaMnO3/g-CN (CMO/g-CN) nanocomposite has been fabricated via a hydrothermal method. The combination of perovskite oxide with 2 D graphitic carbon nitride (g-CN) was designed to improve conductivity and specific surface area (SSA). The material has been characterized via Xray diffraction, SEM, and BET to evaluate its structural, morphological and other aspects like surface area. Electrochemical investigations revealed that CMO/g-CN demonstrates a greater capacitance of 1257 F/g, an impressive energy density (24 Wh kg-1), power density (189 W kg-1) and stability over 4100 cycles. These enhanced features are attributed to the synergistic effect of CMO and g-CN, which accelerates ion transport and reduce charge transfer resistance. These results indicate that CMO/g-CN nanocomposite could be a promising, cost-effective and better choice for next-generation electrochemical energy storage devices.

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