Producing transition metal oxides as cathodes for aqueous zinc-ion batteries via Ultra-Short Laser Pulses for In-situ Nanostructure Generation (ULPING)

Abstract

Aqueous Zinc-ion Batteries (AZIBs) offer a compelling alternative to conventional lithium-ion batteries thanks to their high energy density, cost-effectiveness, and safety profile. Nonetheless, developing high-performance cathode materials poses challenges due to the need to balance electrochemical efficiency with environmental and health considerations. This thesis introduces a cutting-edge laser processing method to fabricate battery electrodes using a fiber-pulsed laser. This approach is efficient and environmentally friendly, as it avoids the use of chemical precursors and eliminates the need for post-processing. The study explores various parameters of pulsed lasers, particularly laser power, in creating an oxide layer directly on the surface of a transition metal. Fabrication was carried out using the Ultra-short Laser Pulses for In-situ Nanostructure Generation (ULPING) system. The effectiveness of the synthesized active surface was validated through material characterization and electrochemical testing. The research examines how the electrochemical performance relates to the physical properties of the treated surface, such as oxidation and surface area. Overall, the study supports sustainable synthesis and cost-effective production methods for aqueous zinc-ion batteries.