Introduction to Galvanic Cells & Voltaic Cells

This lecture covers 5 section(s). Batteries are electrochemical cells that transform chemical energy into electrical energy, powering many devices we use daily. Batteries work using two electrodes (an anode and a cathode) and an electrolyte. The anode is negative and loses electrons (oxidation), while the cathode is positive and gains electrons (reduction). The electrolyte enables ion movement within a battery, facilitating electron flow from anode to cathode through an external circuit. This electron flow creates the electric current that powers devices until the battery discharges and reactants are depleted. Batteries come in different types like alkaline, lithium-ion, and lead-acid. Each type has pros and cons: alkaline are cheap but don't last as long, while lithium-ion last longer but cost more.