Here we show that the overall effect of nanoscaling (LiNH2+2LiH) is to increase both its VSC and GSC relative to the bulk material, due to a combination of higher thermal conductivity, a one-step reaction pathway that allows full access to the intrinsic hydrogen capacity, and improved thermodynamics achieved by using a nanoporous carbon host. Recall that our definitions of VSC and GSC are for the storage system, not just the material, making it nonobvious whether the capacity of (LiNH2+2LiH)@(6nm PC) should be higher than that of the pure bulk material. Using the material properties in Table , the mass and volume of the system, including the balance of plant, were computed using the MHSDT 6 to achieve the required usable gravimetric capacity of 5.6 kg hydrogen specified by the DOE LDV targets. The MHSDT also allows the user to select from several tank materials, including both metal alloys and Type III and Type IV fiber-wrapped composite tanks. In our simulations we selected A286 as the tank material, a precipitation-strengthened Austenitic stainless steel that is both lightweight and compatible with high hydrogen pressures and temperatures. A bed void fraction (the fraction of the tank unfilled by hydride) of 0.3 was assumed. This accounts for both imperfect packing of hydride particles and the necessity of incomplete loading to allow for thermal expansion and changes in material density upon reaction. It is important to note that the DOE targets specify the operating temperature range of the system, not the temperature of the storage material bed. It is typically assumed that the operating temperature of a hydride storage tank must be achievable using the residual heat from a fuel cell (~80 °C) to maximize the efficiency (and thus the driving range) of the system. We show below that by using the MHSDT tank design described here the storage system can operate at a much higher temperature (by burning some of the hydrogen to initiate and maintain the hydrogen desorption rate) while retaining the 5.6 kg of usable hydrogen required to meet the DOE capacity target.