Hydrogen Storage in new Complex Hydrides (CompHy)

• Research unit: SFOE
• Project number: 102314

Key words (German)

TP0066;F - Wasserstoff

Short description (German)

Hydrogen Storage in new Complex Hydrides (CompHy)

Publications / Results (English)

Complex hydrides i.e. alanates (e.g. Na[AlH4]) as reversible hydrogen storage materials were first described by Boris Bogdanovic in 1996 at the MH96 conference in Les Diablerets, Switzerland. In 2001 Züttel and coworkers have started to investigate related complexes the boranates (e.g. Li[BH4]) as hydrogen storage materials. The boranates offer a a much greater gravimetric hydrogen density as compared to the alanates. The hydrogen absorption and desorption mechanism as well as the role of the catalyst are still not known. Therefore, the local environment of the catalyst e.g. Ti-atom is investigated by means of EXAFS (extended x-ray absorption fine structure) and Raman spectroscopy. Furthermore, the structure of the complex ion e.g. [BH4]- during the hydrogen desorption is investigated and the hydrogen dynamics in the lattice is modelled. These measurements are supplemented by UV-vis spectroscopy and isotope exchange experiments (hydrogen-deuterium). The final goal of the project is to describe the mechanism of the hydrogen sorption reaction in great detail together with the physical properties of the compounds as a function of the hydrogen concentration. This work represents also the contribution to the IEA Task 22.

Auftragnehmer/Contractant/Contraente/Contractor:
EMPA

Autorschaft/Auteurs/Autori/Authors:
Züttel,Andreas
Martelli,Pascal

Related documents

• Hydrogen Storage in New Complex Hydrides (COMPHY) - Jahresbericht 2007 [PDF] 138 kB

Final report (English)

Complex hydrides i.e. alanates (e.g. Na[AlH4]) as reversible hydrogen storage materials were first described by Boris Bogdanovic in 1996 at the MH96 conference in Les Diablerets, Switzerland. In 2001 Züttel and coworkers have started to investigate related complexes the borohydrides (e.g. Li[BH4]) as hydrogen storage materials. The borohydrides offer a much greater gravimetric hydrogen density as compared to the alanates. The hydrogen absorption and desorption mechanism as well as the role of the catalyst are still not known. Furthermore, the structure of the complex ion e.g. [BH4]- during the hydrogen desorption is investigated and the hydrogen dynamics in the lattice is modelled. These measurements are supplemented by UV-vis spectroscopy and isotope exchange experiments (hydrogen-deuterium). The final goal of the project is to describe the mechanism of the hydrogen sorption reaction in great detail together with the physical properties of the compounds as a function of the hydrogen concentration. This work represents also the contribution to the IEA Task 22.

Auftragnehmer/Contractant/Contraente/Contractor:
EMPA

Autorschaft/Auteurs/Autori/Authors:
Züttel,Andreas
Borgschulte,Andreas

Related documents

• Hydrogen Storage in New Complex | Hydrides (COMPHY) - Schlussbericht 2010 [PDF] 735 kB