SYNTHESIS OF NICKEL-INTERCALATED ?-MANGANESE DIOXIDE FOR ZINC ION BATTERIES CATHODE

• Main Author: Afiefudin, Mohamad
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/79118
• Institution: Institut Teknologi Bandung

The Zn-ion battery has attracted the attention of researchers as it is considered a potential solution to the issues associated with lithium-ion batteries. The ?-MnO2 cathode has the potential to be the most effective candidate for Zn-ion batteries due to its high theoretical specific capacity of 308 mAh/g. However, manganese- based ?-MnO2 cathode materials often undergo structural transformations and exhibit slow reactions, resulting in low capacity and poor cycling performance. This study addresses these cathode challenges through structural manipulation and the use of nanoscale materials. In this thesis research, nanoscale manipulation with nickel intercalation into the ?-MnO2 cathode structure was achieved through a hydrothermal reaction at 160°C for 10 hours. The synthesized material was characterized for its properties and electrochemical performance. The results of Ni-?-MnO2 synthesis showed higher crystallinity compared to ?- MnO2 cathode, as indicated by XRD results, and increased conductivity from EIS results, enabling rapid diffusion of Zn2+ ions and electron transfer. The galvanostatic charge-discharge (GCD) testing resulted in a high capacity of 350 mAh/g at 50 mA/g and excellent long-term cycling stability, maintaining capacity after 200 cycles. Different morphologies of Ni-?-MnO2, as shown in SEM and TEM results, facilitate ion transportation, making it a promising cathode material for aqueous zinc-ion battery applications.