Boosting energy storage and electrocatalytic performances by synergizing CoMoO4@MoZn22 core-shell structures

By Hengqi Liu, Depeng Zhao, Y. Liu, P. Hu, Xiang Wu, H. Xia. Chemical Engineering Journal, 2019

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Abstract In this work, we report CoMoO4@MoZn22 core-shell structures grown on Ni foam via a simple hydrothermal route. The as-prepared products can be utilized directly as electrode materials for supercapacitors, demonstrating a capacity of 923 C g−1. The as-assembled hybrid capacitor using CoMoO4@MoZn22 as positive electrode delivers an energy density of 129 Wh kg−1 at a power density of 2740 W kg−1 and a capacitance retention of 97% after 10,000 cycles. Moreover, the as-obtained products are also used as the alternative electrocatalysts, which shows a low overpotential of 240 mV at 20 mA cm−2 for oxygen evolution reaction (OER). It suggests that the bi-functional CoMoO4@MoZn22 structures could be potential candidate materials for future energy storage devices and electrocatalysts.

Subfields: Electrical and Electronic Engineering, Electronic, Optical and Magnetic Materials, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/84e0990a38ed6f0eec3d11f26ead237c8f91c0a5