NiAl2O4/NiO nanostructures were synthesized via an auto-combustion method using green tea extract. TiO2, SiO2, and graphene were used in order to enhance the electrochemical hydrogen storage performance of NiAl2O4. The structural analysis of host texture confirmed the formation of NiO alongside with NiAl2O4. Furthermore, the formation of nanocomposites and distribution of the additives on the surface of NiAl2O4/NiO nanostructures were affirmed by XRD and EDS spectra. The morphological analyses were displayed the nanoscale formation of the particles. Interestingly, the electrochemical hydrogen storage of the nanocomposites indicated that upon addition of TiO2, SiO2 and graphene, the discharge capacity enhanced as compare to the host material. The maximum discharge capacities of NiAl2O4/NiO and its respective nanocomposites containing SiO2, graphene, and TiO2 were observed at 850, 2000, 2750 and 3000 mA h/g, respectively. (C) 2017 Elsevier Ltd. All rights reserved.