Porous Ceramics and Metal Hydride Materials for Efficient Hydrogen Storage

In this work, we investigated synthesized porous aluminosilicate materials containing burnable additives, which form a single-phase cubic zeolite structure (Fm3m, a=4.056 Å). The porous ceramic with a zeolite composition at 200°C and a hydrogen pressure of 12 atm exhibited hydrogen absorption of 11 wt.%. We also studied the initial metallic lithium (BCC, a ≈ 3.507 Å), which was subjected to hydrogenation in the developed sealed reactor at 12 atm and 700 °C with the formation of LiH hydride (FCC, NaCl type, a ≈ 4.081 Å, d111 ≈ 2.356 Å). The average size of LiH crystallites does not exceed 100 nm, and the maximum hydrogen capacity of lithium reached 12.4 wt.%. The developed reactor enables safe, high-temperature, high-pressure hydrogenation. These data demonstrate the potential of lithium, titanium, and sodium hydrides, and porous aluminosilicates for the accumulation, storage, and transportation of hydrogen.

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