WEB Solid-gas reactions for thermochemical energy storage
Thermochemical energy storage based on reversible solid-gas reactions can be a potential game-changer in the quest for a sustainable new energy system reducing the carbon footprint of modern society. The advantage of thermochemical energy storage materials (TCM) is the in principle lossless energy storage and its possible temporal and spatial decoupling of supply and demand of heat, which is the most wasted form of energy. The drawback of TCM is the rather low technology readiness level (TRL) in comparison to phase change materials (PCM) and the use of sensible heat storage. This is mainly due to the fact that many TCM feature low cycle stability, material degradation, material agglomeration problems, etc. Therefore, ongoing research needs to target these obstacles on molecular, particle and system scale. Our research focuses on solid-gas reactions based on oxygen/air, carbon dioxide, water vapor and ammonia as gaseous component. A selection of recent advances in material research and characterization e.g. via in-situ powder X-ray diffraction (P-XRD), simultaneous thermal analysis (STA) and some theoretical studies will be presented.