微波法制备氧化镍纳米粒子及其电化学性能研究

Microwave-assisted Synthesis of NiO Nanoparticle and Its Excellent Electrochemical Performance

利用微波法快速制备出NiO纳米粒子.通过X射线衍射、扫描电子显微镜、能谱等测试手段对产物结构和形貌进行研究，结果表明，该种方法制备的N i O样品纯度较高，粒径在50~100 nm.并研究氧化镍纳米粒子的电化学性能，在0.5 A/g的条件下，其比电容达185 F/g，且在1000次循环测试之后，电极比电容量仍维持90%以上.因此，微波法合成出的氧化镍样品在超级电容器中具有潜在的应用价值.

A rapid method based on microwave-assisted process has been developed to synthesize NiO nanoparticles.The products were characterized by X-ray powder diffraction,scanning electron microscopy, and energy-dispersive X-ray analysis.NiO nanoparticles are very pure and the size of as-prepared sam-ple is 50~100 nm.Electrochemical properties show a high specific capacitance of 185 F/g at discharge current of 0.5 A/g,and NiO nanoparticles have also exhibited excellent cycling performance with 〉90%capacitance retention over 1000 cycles.Thus,as-synthesized NiO nanoparticles can be generalized for de-signing next generation supercapacitors.