There is a strong need to store electrical energy from fluctuating renewable energy sources such as solar or wind and to decarbonize transport and industry. High-temperature electrolysis is expected to contribute significantly to reach these goals. This reference text provides a detailed guide, including the fundamental and materials aspects of solid oxide and protonic ceramic electrolysis cells at stack and system levels, as well as recent developments. Applications discussed include the production of green hydrogen as well as the combination of high-temperature electrolysis with other processes for the synthesis of ammonia, methane or e-fuels. Highly relevant to the field of renewable energy supply and conversion, the text provides a comprehensive and accessible reference for researchers, engineers, and graduate students from various disciplines. Key FeaturesProvides comprehensive coverage of high-temperature electrolysis using solid oxide cells with oxygen ion and protonic conductorsCovers the fundamentals of solid oxide and protonic ceramic electrolysis cells and their applications, including power-to-gas and power-to-XIncludes the integration of high-temperature electrolysis into the energy system, and economic analyses of power-to-gas processesProvides a comprehensive and accessible reference for graduate students and researchers, particularly those that are new to the fieldIncludes the latest developments, along with relevant open questions and methods needed to tackle them

Prof. Dr. Werner Sitte is full professor of Physical Chemistry at Montanuniversitaet Leoben, Austria. His research interests concern transport and defect chemistry in ionic solids as well as applications towards solid oxide and protonic fuel and electrolyser cells. He is an associate editor of the journal Solid State Ionics and is on the scientific board of International Conferences on Solid State Ionics.Dr. Rotraut Merkle is a scientist at the Max Planck Institute for Solid State Research, Germany. Her research is dedicated to point defect formation and transport in ionic solids, reaction kinetics at oxide surfaces, transport at grain boundaries, and extends to solid oxide and protonic ceramic fuel and electrolysis cells. She is involved in EMRS, SSI and SSPC conference organization, and is an editor for the Solid State Ionics journal.