静电纺丝法制备的钴酸镍微米带的磁性以及电化学性能

doi:10.3866/PKU.WHXB201209063

物理化学学报 >> 2012, Vol. 28 >> Issue (12): 2874-2878.doi: 10.3866/PKU.WHXB201209063

静电纺丝法制备的钴酸镍微米带的磁性以及电化学性能

朱福良¹, 赵景新^1,2, 程永亮², 李海宝¹, 阎兴斌²

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

收稿日期:2012-07-02 修回日期:2012-09-06 发布日期:2012-11-14
通讯作者: 朱福良, 阎兴斌 E-mail:chzfl@lut.cn; xbyan@licp.cas.cn
基金资助:
甘肃省自然科学基金(3ZS042-B25-029)和国家自然科学基金(51005225)资助项目

Magnetic and Electrochemical Properties of NiCo₂O₄ Microbelts Fabricated by Electrospinning

ZHU Fu-Liang¹, ZHAO Jing-Xin^1,2, CHENG Yong-Liang², LI Hai-Bao¹, YAN Xing-Bin²

1 School of Material Science and Engineering, Lanzhou University of Technology, Lanzhou 730050, P. R. China;
2 Laboratory of Clean Energy Chemistry and Materials, Lanzhou Institute of Chemical Physics, Chinese Academy of Science, Lanzhou 730000,P. R. China

Received:2012-07-02 Revised:2012-09-06 Published:2012-11-14
Supported by:
The project was supported by the Natural Science Foundation of Gansu Province, China (3ZS042-B25-029) and National Natural Science Foundation of China (51005225).

摘要/Abstract

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℃·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10 kOe时磁化强度为6.35 emu·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.

关键词: NiCo₂O₄, 微米带, 磁学性能, 电化学性能, 倍率性能

Abstract:

Cobaltate nickel (NiCo₂O₄) 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 the NiCo₂O₄ 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 the NiCo₂O₄ 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 NiCo₂O₄ microbelts is typical pseudocapacitive capacitance, and the value of the specific capacitance gradually decreases with increasing discharge current density.

Key words: NiCo₂O₄, Microbelt, Magnetic property, Electrochemical property, Rate capability

朱福良, 赵景新, 程永亮, 李海宝, 阎兴斌. 静电纺丝法制备的钴酸镍微米带的磁性以及电化学性能[J]. 物理化学学报, 2012, 28(12), 2874-2878. doi: 10.3866/PKU.WHXB201209063

ZHU Fu-Liang, ZHAO Jing-Xin, CHENG Yong-Liang, LI Hai-Bao, YAN Xing-Bin. Magnetic and Electrochemical Properties of NiCo₂O₄ Microbelts Fabricated by Electrospinning[J]. Acta Phys. -Chim. Sin. 2012, 28(12), 2874-2878. doi: 10.3866/PKU.WHXB201209063

链接本文: https://www.whxb.pku.edu.cn/CN/10.3866/PKU.WHXB201209063

https://www.whxb.pku.edu.cn/CN/Y2012/V28/I12/2874

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静电纺丝法制备的钴酸镍微米带的磁性以及电化学性能

Magnetic and Electrochemical Properties of NiCo₂O₄ Microbelts Fabricated by Electrospinning

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Magnetic and Electrochemical Properties of NiCo₂O₄ Microbelts Fabricated by Electrospinning