Cathode powders are materials that can be used in various electrochemical applications, such as solid oxide fuel cells (SOFCs), solid oxide electrolysis cells (SOECs), gas sensors, and more. Due to their unique properties and performance characteristics, Lanthanum Strontium Manganite (LSM20-HP), Lanthanum Strontium Cobaltite (LSC), and Praseodymium Cerium Oxide (PCO) are beneficial materials. Knowing each compound’s distinct characteristics is important for understanding its best applications and advantages.