Dive into the intricate world of PEM fuel cells with cutting-edge device and materials modeling. This authoritative text comprehensively explores computational studies, from engineering simulations to molecular-level analysis of membranes and catalysts. Gain crucial insights into the utility and best practices of modeling, making it indispensable for researchers, engineers, and advanced students in applied physics and energy science across India. Understand the foundational principles driving innovation in hydrogen energy and advanced material research for next-generation power solutions.