The effect of MgFe2O4 on the hydrogen storage properties of the composite Na3AlH6-4LiBH(4) was studied for the first time, where it was found that MgFe2O4 addition decreased the onset desorption temperature of Na3AlH6-4LiBH(4). Hydrogen (similar to 9.5 wt%) was released in three stages and the dehydrogenation temperatures were reduced to 80 degrees C, 350 degrees C, and 430 degrees C for the first, second, and third stage, respectively. The absorption kinetics of Na3AlH6-4LiBH(4) was also significantly improved due to the catalytic effect of MgFe2O4. Using Kissinger analysis, the apparent activation energies of decomposition of the Li3AlH6 and NaBH4 stages in Na3AlH6-4LiBH(4)-10 wt% MgFe2O4 were calculated to be 72 and 141 kJ/mol, respectively. These values were considerably lower than the corresponding values for the undoped composite. X-ray diffraction analysis revealed the formation of new products such as MgO and Fe during the heating process. Our results suggest that MgFe2O4 enhanced the hydrogen storage properties of Na3AlH6-4LiBH(4) through the formation of active species, such as MgO and Fe. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.