ELECTRODEPOSITION OF COPPER-ZINC TO GRAPHITE

• Main Author: ANNISA DHANTRI (NIM : 10508015); Pembimbing Prof.Dr. Buchari
• Format: Final Project
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/14942
• Institution: Institut Teknologi Bandung

As the world’s primary energy source is declining and limited, alternative energy sources are needed to meet the increasing demand of energy. Button cell as one of those alternatives is a primary battery. Generally, button cells are made from lithium, manganese, silver, and zinc. The use of those metals is inefficient, heavy, and realtively expensive. In this research, the metal is used more efficiently which is as a coating. Since graphite has a good conductivity and resistancy to corrosion, it is used as the basic material. Zinc is commonly used for button cells therefore it is used as the coating. The purpose of this research is to coat the graphite with zinc as a button cell using electrodeposition method. Graphite is first coated with copper in order to obtain a better zinc deposite. In electrodeposition of copper on graphite, two types of baths were used, one without KCl in the electrolytes and the other with KCl in the electrolytes. It is necessary to do an optimization in several parameters which can affect the result of the deposite. In copper electrodeposition, the optimization processes obtained when using current density at 2 A/dm2 and Cu2+ electrolyte solution at 0,1 M. While in copper electrodeposition with KCl electrolytes, the optimization processes obtained with KCl concentration of 0,1 M. In zinc electrodeposition, the optimization process obtained when using current density at 2 A/dm2 and Zn2+ electrolyte solution at 0,2 M. The determination of the distance effect in electrolysis using Hull cell has been done and gives the result that metal ion transport towards cathode is following the exponential equation. In potentiometric test, the research cell potentials followed the theoritic cell potentials. The surface morphology and composition of the deposits were observed by using SEM-EDS.