Fabrication and Charachteristics Studies on Lithium Ion Coin Cells

Technologists are continuing their efforts to develop portable electronic devices with better performance. Ever increasing demand in use of electronic gadgets like cellular phones, laptops, i-pods etc motivated the continuous effort towards development of better life cycle batteries. The battery unit is the main power source to drive underwater weapons. With the advent of lithium-ion battery technology, efforts are being concentrated to develop a suitable battery unit for these devices. Lithium ion batteries are the state-ofthe-art power sources for portable electronic devices and, due to their superior energy and power densities, are promising candidates for the demanding energy storage applications. The development of Lithium ion batteries starts with the fabrication and electrical performance evaluation of the coin cells. The quality of the materials involved in the fabrication gets identified by the performance of coin cells and necessary measures will be taken to improve them. Subsequently, the same can be scaled up for higher capacity and higher energy for adapting to under water applications. The present work consists of the fabrication of coin cells and their electrical characterization. The fabricated coin cells were used to study the discharge voltage under constant current mode using C/10, C/5, C/2 rates. Charging characteristics of coin cell were also studied at C/5 rate.