Flower-like Ni(OH)2 hybridized g-C3N4 for high-performance supercapacitor electrode material

•The graphite-like C3N4 hybridized flower-like Ni(OH)2 composite is designed.•After introducing g-C3N4, the Ni(OH)2 nanoplates convert to flower-like morphology.•The g-C3N4/Ni(OH)2 composite exhibits excellent electrochemical property.

Graphite-like C3N4 hybridized β-Ni(OH)2 with flower-like structure is successfully synthesized via a facile hydrothermal route. Due to the introduction of g-C3N4, Ni(OH)2 nanoplates convert to flower-like morphology, which provides excellent ion diffusion and electron transport. As a result, g-C3N4/Ni(OH)2(1) exhibits a specific capacitance of 505.6 F/g at a current density of 0.5 A/g, higher than that of the pure Ni(OH)2 (228 F/g). The experimental results indicate that the as-prepared samples are promising materials for high-performance supercapacitor.

Graphical abstractA novel electrochemical pseudocapacitor material based on g-C3N4 and flower-like Ni(OH)2 is prepared by a facile hydrothermal route. The excellent electrochemical property exhibits that the as-prepared samples are promising materials for high-performance supercapacitor application.Figure optionsDownload full-size imageDownload as PowerPoint slide