Enhanced electrochemical performances of ZnCo2O4@CoMoO4 core-shell structures with long cycling stabilities.

Developing electrode materials with high specific capacitance and excellent stability for energy storage is necessary to solve energy shortage issues. In this work, we prepare ZnCo2O4@CoMoO4 core-shell structures on nickel foam by a simple hydrothermal approach. The as-synthesized products show excellent electrochemical performances. It reveals that the secondary growth of CoMoO4 nanosheets induces many active sites and facilitates rapid ion and electron transmission. In addition, the as-assembled device delivers high energy density, indicating that the as-obtained samples are excellent candidates for future energy storage applications.

Formation of ZnCo2O4@MnO2 core-shell electrode materials for hybrid supercapacitor.

In this work, ZnCo2O4@MnO2 core-shell structures are successfully prepared on nickel foam by a simple hydrothermal approach. The obtained core-shell structures exhibit excellent areal capacitance and cycling stability, which may be ascribed to the rational design of a hybrid-material based electrode structure that facilitates ion transport. The as-assembled supercapacitor device shows outstanding specific capacitance, demonstrating that ZnCo2O4@MnO2 core-shell structure is a candidate as a supercapacitor electrode material in flexible energy storage applications.