TK4093 CHEMICAL ENGINEERING RESEARCH II The Effect of Graphene : Activated Carbon Ratio and humidity on Zinc-Air Battery

• Main Author: Ramadhani, Isra
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/35328
• Institution: Institut Teknologi Bandung

The increase in electricity demand is inbalence with the amount of electricity produced by available power plants. Therefore, a battery, which effectively and efficiently capable for producing and storing energy is required. The secondary Zn-Air battery has advantages over other types of metal-air batteries, which are having high energy and power density, high safety factors, and economic viability. Due to the limited charge and discharge cycles, Zn-Air batteries suffer from low round trip efficiency and considerably high overpotential. Therefore, high conductivity electrocatalyst materials are needed to catalyze cathodic reaction. Cathodes with the composition of 100% graphene provide better operating performance, smaller resistance, and greater capacitance than other cathode compositions at the same humidity conditions. At 70% RH, which is typical of humidity in tropical countries, the battery shows better operating performance than at 60% RH and 80% RH in the same cathode composition. The performance and operation mechanism of Zn-air battery based on the assembly technique of battery. After electrochemical characterization, the physical characterization of Zn-Air batteries are tested to determine the cathode activity using Scanning Electron Microscope (SEM) and X-ray Diffraction (XRD) analysis showed the agglomeration of Ni electrocatalyst which caused the decrease in cathode conductivity.