Electrochemical Performance of ZIF-8 Coated Zn Anode in a Solid-State Zn Air Battery

Abstract

The growing research on the application of flexible electronics, namely, flexible metal-air batteries has been evident throughout the recent decade. In this study, Zeolitic imidazolate framework-8 (ZIF-8) as a metal-organic framework was used as a masking agent to inhibit the zincate ions at the negative electrode’s vicinity. Polyacrylamide/polyacrylic acid gel copolymer was used as the solid-state electrolyte and a commercial Pt-coated gas diffusion layer (GDL) as the cathode compartment with ZIF-8 coated zinc nanoparticles being the negative electrode. Scanning electron microscopy was conducted to study the shape deformation of the anode. The electrochemical performance of the battery was evaluated using a galvanostatic charge/discharge test and electrochemical impedance spectroscopy. This research resulted in a capacity of 117.71 mAh at discharge rate of 5 mA cm−2 and 13 successful charge/discharge cycles at the rate of 50 mA cm−2. In addition, the Na-PAA/PAM copolymer solid-state electrolyte was reported to have ionic conductivity of 300 mS cm−1.