静电纺丝法制备NiO-ZnO纳米纤维及其电化学性能研究

Study on the electrochemical property of NiO - ZnO nano-fibers fabricated by Electrostatic spinning

摘要:

采用静电纺丝法制备NiO-ZnO 复合氧化物纳米纤维,利用XRD、XPS、BET、SEM、TEM和电化学工作站等对材料的结构、成分、形貌和电化学性能进行表征。结果发现当镍与锌质量比为10:1时,NiO-ZnO复合氧化物纳米纤维具有大比表面积71.425m₂/g,表面占主导地位的介孔直径约为13.37nm。在电化学测试中,该样品呈现出清晰的氧化还原峰, 在1A/g的电流密度下,放电比电容量为441F/g,这远高于纯NiO纤维的331F/g,循环1000次电容保持率达到81.2%,也远大于纯NiO纤维的70.4%。当电流密度为0.5A/g时,比电容量达到最大为461F/g,表现出优良的充放电性能。

Abstract:

By Electrostatic spinning method，it was prepared NiO - ZnO oxide nanofibers with different mass ratios. Their structure, composition and morphology were characterized by XRD, XPS, BET, SEM and TEM respectively and their electrochemical properties were also investigated by electrochemical workstation. The results showed that when the nickel and zinc ratio was 10:1, the obtained nanofibers possessed large surface area of 71.425m2/g and were porous with mesoporous diameter of 13.37nm. Electrochemical tests showed that the 10:1 sample had clearer redox peak and more large discharge capacity than the pure NiO fibers, in which the value of the capacity had risen from 331F/g to 441F/g under the current density of 1A/g. Eespecially, it still remained 81.2% of starting value after 1000 cycles, and its maximum capacitance was 461F/g at 0.5A/g, which showed the excellent electrochemical performance of the sample.The process of the nanofiber synthesis was also introduced.