LAUSR

The exploitation of new energy storage systems has gradually drawn researchers’ interests in recent years. Herein, a novel alkaline aqueous battery is fabricated based on nanoflakes-assembled (Ni0.5Co0.5)0.85Se microspheres and reduced graphene oxide (rGO)/porous Fe2O3 nanospheres composite as cathode and anode, respectively. The nanoflakes-assembled (Ni0.5Co0.5)0.85Se microspheres are prepared through a two-step hydrothermal approach, while the rGO/porous Fe2O3 nanospheres composite is synthesized by a facile one-pot ionic liquid-assisted hydrothermal approach. On account of the unique structural features as well as excellent electrochemical behaviors, the assembled novel (Ni0.5Co0.5)0.85Se//rGO/Fe2O3 alkaline aqueous battery achieves a great specific energy of 37.2 Wh kg-1 at a power density of 500 W kg-1, or an ultrahigh specific power of 10 kW kg-1 at a reasonable specific energy of 11.9 Wh kg-1 and excellent cycling performance with 84.5% of initial capacity retention at 3 A g-1 after 2000 cycles. Th...