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.

采用简单的固态化学反应合成了具有不同晶相的NiMoO ₄纳米材料，无需使用有机溶剂或模板剂。所制备的NiMoO ₄ ·XH ₂ O，α-NiMoO ₄和β-NiMoO ₄纳米结构进行了研究，作为电极材料的超级电容器。β型NiMoO ₄纳米棒组成的纳米颗粒，其表现出相对高的比电容约为1415 F G的^-1在将1 g的电荷密度^-1，初始可逆容量的80.2％的1000次循环后仍保持。β型NiMoO ₄// rGO非对称超级电容器（ASC）系统按系列组装，在187 W kg ^-1的高功率密度下显示出29.3 Wh kg ^-1的高比能量密度。该ASC系统可以有效地驱动发光二极管（LED）并发出约40分钟的光，甚至可以轻松地连续点亮两个LED 20分钟。出色的电化学性能使所制备的NiMoO ₄纳米结构成为用于高级超级电容器的电极材料的极佳候选者。