New Hydrogen Storage Materials

In the first embodiment, a slurry of an inert stabilizing liquid protects the hydride from contact with moisture and makes the hydride pumpable. At the point of use, the slurry is mixed with water and the consequent reaction produces high-purity hydrogen. 

The reaction can be controlled in an aqueous medium via pH and the use of a catalyst [91]. While the material hydrogen capacity can be high and the hydrogen release kinetics fast, the borohydride regeneration reaction must take place off-board. Regeneration energy requirements, cost and life-cycle impacts are key issues 

Millennium Cell has reported that their NaBH4-based hydrogen on demand system possesses a system gravimetric capacity of about 4wt%. Similarly to other material approaches, issues include system volume, weight and complexity and water availability. 

Hydrogen will be stored in various ways depending on the application, for example, mobile or stationary. Today we know of several efficient and safe ways to store 

The material science challenge is to understand better the electronic behavior of the interaction of hydrogen with other elements, especially metals. Complex compounds such as A1(BH4)3 have to be investigated and new compounds formed from lightweight metals and hydrogen will be discovered. 

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Zuttel, A., A. Borgschulte, and S.-I. Orimo, Tetrahydroborates as new hydrogen storage materials, Seri. Mater., 56,823-828,2007. 

Bogdanovic, B., Brand, R.A., Marjanovie, A., Sehwikardi, M., Tolle, J. 2000. Metal doped sodium aluminum hydrides as potential new hydrogen storage materials. J Alloys Comp 302 36-58. 

Ziittel, A., Wenger, R, Rentsch, S., Sudan, R, Maurona, R, Emmenegger, C. 2003. LiBH., a new hydrogen storage material. J Rower Sources 118 1-7. 

A. ZUttel, P. Wenger, S. Rentsch, P. Sudan, LiBH a new hydrogen storage material, J. Power Sources 118 (2003) 1-7. 

The standard approach for the search of new hydrogen-storage materials is to synthesize bulk samples and to use gravimetric [1,2] or volumetric [1,3] techniques to follow their hydrogenation reaction and to record pressure-concentration isotherms (pcT). The equilibrium pressure of the metal-to-hydride transition is determined from the plateau of the pressure composition isotherms. The enthalpy of hydride formation is exttacted from the temperature dependence of the equilibrium pressure, by means of the Van t Hoff relation ... 

Sodiiun Aluminum Hydride Fundamental Studies and Development of a Promising New Hydrogen Storage Material. Universal Oil Products, 8/13/03. 

Ziittel, A. Wenger, P Rensch. S. Sudan, P Mauron, P Emmenegger, C., L1BH4, A new hydrogen storage material, J. Power Sources 2003,118,1-7. 

Matsunaga, T. Buchter, R Miwa, K. Towata, S. Orimo, S. Ziittel, A., Magnesium borohydride A new hydrogen storage material. Renew. Energy 2008, 33,193-196. 

Zuttel A et al (2007) TetrahydrobOTates as new hydrogen storage materials. Scr Mater... 

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