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第 35 卷第 8 期 精 细 化 工 Vol.35, No.8
201 8 年 8 月 FINE CHEMICALS Aug. 2018

有机电化学与工业
LiNi Mn O 及其复合物的制备、表征及电化学性能
0.5
1.5
4
吴贤文，周上睿，李芸东，胡 颖，陈荟杨，王 晶，邹 莉

（吉首大学 化学化工学院， 湖南 吉首 416000）

摘要：为了改善 LiNi 0.5 Mn 1.5 O 4 的电化学性能，采用喷雾干燥法和静电纺丝法合成了 LiNi 0.5 Mn 1.5 O 4 前驱体。借
助 X 射线衍射（XRD）、扫描电子显微镜（SEM）、透射电子显微镜 （TEM） 对 LiNi 0.5 Mn 1.5 O 4 进行了表征，

采用恒流充放电、循环伏安及交流阻抗对其电化学性能进行了测试。结果表明：静电纺丝法制备的 LiNi 0.5 Mn 1.5 O 4
呈多孔的管状结构，颗粒粒径约为 80 nm，其循环性能有待进一步提高。而喷雾干燥法制备的前驱体在 900 ℃
烧结合成的 LiNi 0.5 Mn 1.5 O 4 具有明显的尖晶石结构，颗粒分布均匀，颗粒平均粒径在 1~2 m。静电纺丝法和喷
雾干燥法合成的纯相 LiNi 0.5 Mn 1.5 O 4 在 0.1 C 倍率下首次充放电效率分别为 48.1%、50.3%。喷雾干燥法制备的
LiNi 0.5 Mn 1.5 O 4 前驱体经碳包覆后的材料首次充放电效率提高到 53.4%，在 1 C 倍率下循环 200 次后，容量保持
率高达 93.3%。
关键词：锂离子电池；高电压材料；喷雾干燥；静电纺丝；有机电化学与工业
中图分类号：TM912.9 文献标识码：A 文章编号：1003-5214 (2018) 08-1382-07

Preparation, Characterization and Electrochemical Properties of
LiNi 0.5Mn 1.5O 4 and lts Composite

WU Xian-wen, ZHOU Shang-rui, LI Yun-dong, HU Ying, CHEN Hui-yang, WANG Jing, ZOU Li
（College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, China）

Abstract: In order to improve the electrochemical properties of LiNi 0.5Mn 1.5O 4, the precursor of
LiNi 0.5Mn 1.5O 4 was synthesized by spray drying method or electrospinning method. The resultant materials
were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and transmission
electron microscopy (TEM). The electrochemical properties were investigated by galvanostatic
charge/discharge tests, cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The
results showed that the as-prepared LiNi 0.5Mn 1.5O 4 prepared by electrospinning method with a porous
tubular structure showed poor cycling performance, and the particle size of particles was about 80 nm.
While the precursor prepared by spray drying method calcined at 900 ℃ gave spinel LiNi 0.5Mn 1.5O 4 with
an uniform particle distribution, and the particle size was between 1 and 2 m. The first charge and
discharge efficiency of pure LiNi 0.5Mn 1.5O 4 prepared by electrospinning method and spray drying method at
0.1 C rate were 48.1% and 50.3%, respectively. While the first charge and discharge efficiency of
carbon-coated LiNi 0.5Mn 1.5O 4 prepared by spray drying method reached 53.4%, and the capacity retention
ratio was still up to 93.3% even after 200 cycles at 1 C rate.
Key words: lithium ion battery;high voltage material; spray drying; electrospinning; electro-organic
chemistry and industry
Foundation items: National Natural Science Foundation of China (51704124,51762017, 51662010);
Outstanding Youth Project of Hunan Provincial Education Department (15B190)

目前，锂离子电池在小型便携式电子通讯领域 交通工具的快速发展迫切需要开发高电压正极材料
[1]
得到了广泛应用并占据了主导地位 。然而，电动 以满足高能量、高功率密度锂离子电池的需求。众

收稿日期：2017-10-27; 定用日期：2018-02-12; DOI: 10.13550/j.jxhg.20170638
基金项目：国家自然科学基金（51704124, 51762017, 51662010）；湖南省教育厅优秀青年项目（15B190）
作者简介：吴贤文（1983—），男，副教授，电话：0743-8563911，E-mail：wxwcsu2011@163.com。