水热法制备NiMoO_(4)纳米材料及其电化学性能的研究

Preparation of NiMoO_(4) Nanomaterials by Hydrothermal Method and Their Electrochemical Properties

NiMoO_(4)纳米材料在新型绿色电池、超级电容器等方面具有潜在的应用价值,利用水热法制备NiMoO_(4)纳米材料,探究不同反应温度对制备材料的表面形貌、结构和电化学性能的影响。研究结果表明,150℃反应6 h制备的NiMoO_(4)样品呈现纳米纤维形貌,而且表现出最佳的超级电容器性能。当放电电流密度为0.5 A/g时,其比电容达到600 F/g,即使在10 A/g时,NiMoO_(4)电极仍然能够保持300 F/g的比电容。此外,NiMoO_(4)电极表现出优异的循环寿命,经过6000次循环充放电(放电电流密度为5 A/g),仍然保持其初始比电容的97%。优异的循环稳定性使NiMoO_(4)成为一种极具前景的高性能超级电容器材料。

NiMoO_(4) nanomaterials have potential applications in new green batteries,supercapacitors,and so on.The hydrothermal method was used to prepare the NiMoO_(4) nanomaterials.The effects of different reaction temperatures on the surface morphology,structure and electrochemical properties of the prepared materials have been investigated.The results showed that NiMoO_(4) samples prepared at 150℃ for 6 h had nanofiber morphology and exhibited the best supercapacitor performance.When the discharge current density was 0.5 A/g,the specific capacitance reached 600 F/g.The NiMoO_(4) electrode can still maintain a specific capacitance of 300 F/g even at 10 A/g.In addition,the NiMoO_(4) electrode presented excellent cycle life,retaining 97% of its initial specific capacitance after 6000 charge/discharge cycles(at a discharge current density of 5 A/g).The excellent cyclic stability of NiMoO_(4) makes it become a promising material for high-performance supercapacitors.