Gravimetric capacities

System gravimetric capacity usable energy density from H2 (net useful energy/max system mass) kWh/kg (kg H2/kg system) 1.5 (0.045) 2 (0.06) 3 (0.09)... 

Metal- hydrogen system Hydride Theoretical maximum gravimetric H, capacity) (wt%) Theoretical reversible gravimetric capacity (wt%) Approx, desorption temperature range (°C)... 

In this section we will focus on four alanates with high practical potential such as NaAlH, LiAlH and Mg(AlH )2/Ca(AlH )2. Alanates with theoretical gravimetric capacities lower than that of NaAlH, being impractical for mobile applications, will not be discussed. 

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. 

The gravimetric capacities of cathode materials for lithium and lithium ion batteries tabulated from the literature... 

Among diverse alloys, amorphous Sn composite oxide (ATCO) reported by Fuji photo film has caused a great deal of renewed interests in Li alloys as an alternative for use in the negative electrode of Li-ion batteries [176,177]. The ATCO provides a gravimetric capacity of >600mAh/g for reversible Li adsorption and release, which corresponds to more than 2200mAh/cm3 in terms of reversible capacity per unit volume, that is, about twice that of the carbon materials. 

Metal Standard potential at 25 °C (V) Atomic weight (g) Density (g/cc) Melting point (°C) Valence Gravimetric capacity (Ah/g) Volumetric capacity (Ah/cc)... 

The population of H2 that interacts effectively with SWNT a given H2 loading. Does the diameter and chirality of the tubes affect this quantity Is the year 2010 gravimetric capacity target of 6.5 wt. % H2 set by the U.S. Department of Energy feasible ... 

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