This Book gives a glimpse of the Fuel Cell technology which is one of the alternate energy source in the present world which is facing severe crisis of the fossil fuels and a global warming problems which have a huge impact on the climatic conditions. This book covers the different fuel cell technologies ,their applications , kinetics , thermodynamics involved in the fuel cell technology and also the components , parameters involved, the power generation polarization curves, the role of the membranes and polymers in the designing of fuel cells and also the factors effecting the performance of the fuel cell.