Introduction to Concentration Polarization in Electrochemical Systems

When designing or analyzing electrochemical energy systems, understanding how chemical species move and accumulate near electrode surfaces is critical to maximizing efficiency and avoiding power losses. This course demystifies concentration polarization, giving you a solid grasp of transport phenomena without requiring advanced multi-phase thermodynamics. You will transition from understanding basic molecular diffusion to predicting how mass-transport limitations affect real-world cell voltage and current density. What you'll learn: Understand the core concepts of concentration polarization and mass transfer resistance; Analyze boundary layers and concentration gradients near electrode surfaces; Apply Nernst-Planck and Fickian diffusion equations to electrochemical interfaces; Calculate limiting current density and mass transport overpotentials; Explore modern applications of polarization theory in lithium-ion batteries and fuel cells. The course begins with foundational definitions of electrochemical potentials and transport mechanisms, then moves systematically into quantitative boundary layer models and practical engineering approximations. This course is designed for engineering students, researchers, and energy professionals who are new to electrochemical transport phenomena and want a clear, step-by-step theoretical foundation. Start mastering the principles of electrochemical mass transport today.