Raja RehmanCIIT/FA21-RPH-008/LHRDr. Muhammad Ajmal KhanLHR TP 85902026-02-282023https://repository.cuilahore.edu.pk/handle/123456789/2554Humans require energy in the modern world. Energy must thus be taken into consideration if life is to continue [1]. In the current state of our everyday life, energy consumption is increasing daily. Every country needs energy to be prosperous [2]. The availability of energy determines a country's capacity for economic development. The world is dealing with several energy-related issues, and as population grows, so does energy demand [3]. Both the exponential rise in technology and the exponential expansion in people are to blame for the increase in energy usage. These days, we utilize energy in a variety of ways, including for systems in homes, companies, and industries as well as for communication, transportation, and other purposes. Fig (1.1) illustrates the annual global energy consumptioenDepartment of PhysicsFA21PhysicsOxygen Transport Properties and Electrochemical Characterization of perovskites' Based Sr-PrxFel-x/ Sr-XuxFel-x Cathode Material Fuel CellThesis