静电纺丝法制备的钴酸镍微米带的磁性以及电化学性能(英文)  

Magnetic and Electrochemical Properties of NiCo_2O_4 Microbelts Fabricated by Electrospinning

作　　者：朱福良[1] 赵景新[1,2] 程永亮[2] 李海宝[1] 阎兴斌[2] 

机构地区：[1]兰州理工大学材料科学与工程学院,兰州730050 [2]中国科学院兰州化学物理研究所,清洁能源化学与材料实验室,兰州730000

出　　处：《物理化学学报》2012年第12期2874-2878,共5页Acta Physico-Chimica Sinica

基　　金：supported by the Natural Science Foundation of Gansu Province, China (3ZS042-B25-029);National Natural Science Foundation of China (51005225)~~

摘　　要：通过直接退火静电纺丝前驱样品以及调节升温速率最终得到了钴酸镍(NiCo2O4)微米带.通过X射线衍射、扫描电镜、振动样品磁强计以及电化学工作站等分析手段对钴酸镍微米带的晶体结构、形貌、磁学性能以及电化学性能进行了研究.结果显示,以1°C·min-1的升温速率得到的NiCo2O4微米带属于立方尖晶石结构,高温处理后仍能保持一维结构.室温磁化结果显示制备的NiCo2O4微米带具有超顺磁性,在10kOe时磁化强度为6.35emu·g-1.此外,电化学测试结果显示,NiCo2O4微米带的电容特性是典型的赝电容,并且比电容随着放电电流密度的增加而减小.Cobaltate nickel （NiCo20,） microbelts were fabricated by direct calcination of electrospun precursor samples with an appropriate heating rate. The crystal structure, morphology, magnetic properties, and electrochemical properties of theNiCo2O4 microbelts were investigated by X-ray diffraction, scanning electron microscopy, vibrating sample magnetometry, and electrochemical analysis. The results showed that a heating rate of 1 ℃. min-1 resulted in the formation of cubic spinel NiCo2O4 microbelts. After calcination at high temperatures, the microbelts retained their one-dimensional structure. Magnetization results indicated that theNiCo2O4, microbelts were superparamagnetic and their magnetization value at 10 kOe was 6.35 emu. g-1. Moreover, the electrochemical results suggest that the capacitance of the NiCo2O4microbelts is typical pseudocapacitive capacitance, and the value of the specific capacitance gradually decreases with increasing discharge current density.

关 键 词：NiCo2O4 微米带 磁学性能 电化学性能 倍率性能 

分 类 号：O614.81[理学—无机化学]