Kinetic alteration of the 6Mg(NH2)2-9LiH-LiBH4 system by co-adding YCl3 and Li3N
- Cao, Hujun
- Zhang, Weijin
- Pistidda, Claudio
- Puszkiel, Julián Atilio
- Milanese, Chiara
- Santoru, Antonio
- Karimi, Fahim
- Castro Riglos, Maria Victoria
- Gizer, Gökhan
- Welter, Edmund
- Bednarcik, Jozef
- Etter, Martin
- Chen, Ping
- Klassen, Thomas
- Dornheim, Martin
DOIAbstract
The 6Mg(NH2)2-9LiH-LiBH4 composite system has a maximum reversible hydrogen content of 4.2 wt% and a predicted dehydrogenation temperature of about 64 °C at 1 bar of H2. However, the existence of severe kinetic barriers precludes the occurrence of de/re-hydrogenation processes at such a low temperature (H. Cao, G. Wu, Y. Zhang, Z. Xiong, J. Qiu and P. Chen, J. Mater. Chem. A, 2014, 2, 15816-15822). In this work, Li3N and YCl3 have been chosen as co-additives for this system. These additives increase the hydrogen storage capacity and hasten the de/re-hydrogenation kinetics: a hydrogen uptake of 4.2 wt% of H2 was achieved in only 8 min under isothermal conditions at 180 °C and 85 bar of H2 pressure. The re-hydrogenation temperature, necessary...
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