Solid-state chemical fabrication of one-dimensional mesoporous β-nickel molybdate nanorods as remarkable electrode material for supercapacitors.


Key Laboratory of Energy Material, Ministry of Education, Key Laboratory of Advanced Functional Materials, Autonomous Region, Institute of Applied Chemistry, Xinjiang University, Urumqi 830046, Xinjiang, PR China. Electronic address: [Email]


Simple solid-state chemical reaction was adopted to synthesize NiMoO4 nanomaterials with different crystal phase without the use of organic solvent or templating agent. The as-prepared NiMoO4·xH2O, α-NiMoO4 and β-NiMoO4 nanostructures were investigated as the electrode materials for supercapacitors. The β-NiMoO4 nanorods were composed of the nanoparticles, which exhibited relatively high specific capacitances about 1415 F g-1 at a charge density of 1 A g-1, 80.2% of the initial reversible capacity was maintained after 1000 cycles. The β-NiMoO4//rGO asymmetric supercapacitor (ASC) system was assembled in serials, which displayed high specific energy density of 29.3 Wh kg-1 at a high power density of 187 W kg-1. This ASC system can drive the light-emitting diode (LED) effectively and give out light about 40 min, even easily light two LEDs in serials for 20 min. The remarkable electrochemical performances make the as-prepared NiMoO4 nanostructures an excellent candidate as electrode materials for advanced supercapacitors.


Nanostructures,Solid-state synthesis,Supercapacitors,β-NiMoO(4),