High Energy Storage Capabilities of CaCu3Ti4O12 for Paper-Based Zinc-Air Battery

Abstract

A new perovskite material, CaCu3Ti4O12 (CCTO), is proposed as an efficacious electrocatalyst for oxygen evolution/reduction reactions for the development of zinc-air batteries (ZAB). Synthesis of this material adopted an effective oxalate route, which led to the purity in the electrocatalyst composition. The CCTO material is a proven potential candidate for energy applications because of its high dielectric permittivity (ε) and occupies an improved ORR activity with better onset potential, current density, and stability. The CCTO perovskite was also evaluated for the zinc-air battery as an air electrode, corresponding to the high specific capacitance of 1165 mAh g-1 with the greater cyclic efficiency and minimum variations in both charge/discharge processes. The highest power density (Pmax) measured was 32 mW cm-2. The OCV (Open Circuit Potential) obtained was 1.44 V for the as-developed battery. Also, the CCTO based paper battery shows an excellent performance achieving a specific capacity of 947.79 mAh g-1. The obtained results promise CCTO as a potential and cheap electrocatalyst for application in energy applications.