Batteries, fuel cells and electrolysis: Battery principle

This lecture introduces the operating principle and components of fuel cells, starting with an explanation of how a battery works and then delving into how a fuel cell operates. Different types and architectures of fuel cells are explored, focusing on materials, catalysts, temperatures, and compatible fuels. The classic car battery, lead acid battery, is used as an example to illustrate the reactions and electron exchange involved in generating voltage. The lecture also covers the voltage-current curve of a battery, highlighting the relationship between current flow and voltage loss due to internal resistance. The distinction between batteries and fuel cells is emphasized, with batteries involving active participation of electrode materials in reversible reactions, making them rechargeable.