|
Physikalische Gesellschaft Zürich
|
|
The current state of energy transition is concerned with replacing fossil fuel energy conversion with renewable energy mainly based on electricity resulting in potential energy shortage ("Winterflaute"). Thus, ostensible goal is the highest conversion efficiency while neglecting other parameters such as scalability and tradability being more important in a developed renewable energy landscape. Here, chemical fuels such as hydrogen have great potential. However, a high hydrogen storage density as pivotal for an energy carrier can only be reached by hydrogen storage in light weight metal hydrides. Despite huge research effort, practical implementation of such systems is still hampered by thermodynamic limitations. In this talk, I will demonstrate along the archetypal example MgH2 that these limitations can be traced back to the intrinsic physical properties of the hydrogen in the material. Concretely, during absorption in Mg, hydrogen changes its chemical state from neutral to negative by forming the hydrogen anion. The peculiar properties of H-, which were first described by astrophysicists, need to be considered for further improvement of sorption kinetics in light weight metal hydrides.
|
|
Physikalische Gesellschaft Zürich E-Mail: pgz_info at pgz.ch Web: http://www.pgz.ch |
[ HOME
]
[ Kontakt
]
[ Site Map
]
[ Design
]
Zurich local time 7.5.2024 17:27:56 |
Printer Friendly Version |