High-Performance Nickel-Zinc Battery Composed of Sic-Coated Zinc Anode and Mococu-P Coated Nickel Foam Cathode

Abstract

A high-performance nickel-zinc alkaline battery comprising a SiC-coated Zn anode and MoCoCu-P medium-entropy alloy-coated nickel foam Ni (NF) cathode is designed and fabricated. The battery shows a large areal capacity 4.0 mAh cm-2 (15.0 mA cm-2), and excellent cyclability for 45 hours (areal capacity 1.5 mAh cm-2 at 60.0 mA cm-2). The energy density and power density are 6.25 (4.41) mWh cm-2 and 31.1 (60.2) mW cm-2, respectively, at a current density of 15 (40) mA cm-2. The outstanding properties of the Ni-Zn alkaline battery stem from the improved Zn plating/stripping process through SiC coating, synergistic effects rendered by the different ingredients, as well as the hybrid redox process of Ni and Co.

Keywords: Ni-Zn battery, SiC, medium-entropy alloy, synergistic effects