This book is a comprehensive review of high-temperature polymer electrolyte membrane fuel cells (PEMFCs). PEMFCs are the preferred fuel cells for a variety of applications such as automobiles, cogeneration of heat and power units, emergency power and portable electronics. The first 5 chapters of the book describe rationalization and illustration of approaches to high temperature PEM systems. Chapters 6 - 13 are devoted to fabrication, optimization and characterization of phosphoric acid-doped polybenzimidazole membranes, the very first electrolyte system that has demonstrated the concept of and motivated extensive research activity in the field. The last 11 chapters summarize the state-of-the-art of technological development of high temperature-PEMFCs based on acid doped PBI membranes including catalysts, electrodes, MEAs, bipolar plates, modelling, stacking, diagnostics and applications.

This book is a comprehensive review of high-temperature polymer electrolyte membrane fuel cells (PEMFCs). PEMFCs are the preferred fuel cells for a variety of applications such as automobiles, cogeneration of heat and power units, emergency power and portable electronics. The first 5 chapters of the book describe rationalization and illustration of approaches to high temperature PEM systems. Chapters 6 - 13 are devoted to fabrication, optimization and characterization of phosphoric acid-doped polybenzimidazole membranes, the very first electrolyte system that has demonstrated the concept of and motivated extensive research activity in the field. The last 11 chapters summarize the state-of-the-art of technological development of high temperature-PEMFCs based on acid doped PBI membranes including catalysts, electrodes, MEAs, bipolar plates, modelling, stacking, diagnostics and applications.

Preface.- Introduction.- Modifications of sulfonic acid-based membranes.- Acid-base chemistry and proton conductivity.- Applications of acid-base blend concepts to intermediate temperature membranes.- Pyridine Containing Aromatic Polyether Membranes.- Techniques for PBI membrane characterization.- Synthesis of Polybenzimidazoles.- Phosphoric acid and its interactions with polybenzimidazole type polymers.- Polybenzimidazole membranes by post acid doping.- PBI membranes via the PPA process.- Polybenzimidazoles with enhanced basicity: a chemical approach for durable membranes.- Polybenzimidazole/porous poly(tetrafluoro ethylene) composite membranes.- PBI-based composite membranes.- Catalysts and Catalyst-Layers in HT-PEFCs.- Catalyst support material and electrode fabrication.- Design and Optimization of HT-PEMFC-MEAs.- Characterization of HT-PEM Membrane-Electrode-Assemblies.- Approaches for the modeling of PBI/H3PO4 based HT-PEM fuel cells.- Bipolar plates and gaskets: Different materials and processing methods.- Stack concepts for high temperature polymer electrolyte membrane fuel cells.- High Temperature PEM Fuel Cell Systems, Control and Diagnostics.- Durability Issues and Status of PBI Based Fuel Cells.- High Temperature Polymer Electrolyte Fuel Cell Systems for Aircraft Applications.- Electrochemical Hydrogen Pumping.