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第 35 卷第 7 期 精 细 化 工 Vol.35, No.7
201 8 年 7 月 FINE CHEMICALS July 2018

有机电化学与工业
Li Ti O -C 复合材料的制备及性能
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于小林 ，吴显明 1,2* ，丁心雄 ，李叶华 ，刘立瑶 ，吴贤钊 ，石青锋
（1. 吉首大学 化学化工学院，湖南 吉首 416000；2. 湘西自治州矿产与新材料技术创新服务中心，湖
南 吉首 416000）
摘要：以葡萄糖为碳源，以 Li 2 CO 3 、TiO 2 为原料，采用原位复合法制得不同碳质量分数的锂离子电池复合
负极材料 Li 4 Ti 5 O 12 -C。通过 X 射线衍射和扫描电子显微镜对复合材料的结构及表面形貌进行了表征，采用
恒流充放电和电化学阻抗等技术对复合材料进行电化学性能测试。结果表明：Li 4 Ti 5 O 12 -C 没有杂相，颗粒
均匀。其中，碳质量分数为 3%的复合材料在 0.5 C 下的首次放电比容量最高，为 185.9 mA·h/g，循环 50
次后，其放电比容量仍为 161.5 mA·h/g，容量保持率为 86.9%；在 4.0 C 下，其首次放电比容量为 106.9
mA·h/g。与其他样品相比，碳质量分数为 3%的复合材料循环伏安氧化还原峰电位相差为 278.6 mV，溶液
阻抗为 6.198 Ω，电荷转移电阻为 187.2 Ω，电化学性能最好。
关键词：锂离子电池；Li 4 Ti 5 O 12 ；表面修饰；电化学；原位复合法；有机电化学与工业
中图分类号：TQ314 文献标识码：A 文章编号：1003-5214 (2018) 07-1216-05

Preparation and Electrochemical Performances of
Li 4Ti 5O 12-C Composite Materials

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YU Xiao-lin , WU Xian-ming 1,2* , DING Xin-xiong , LI Ye-hua ,
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LIU Li-yao , WU Xian-zhao , SHI Qing-feng
（1. College of Chemistry and Chemical Engineering, Jishou University, Jishou 416000, Hunan, China; 2. Xiangxi
Minerals and New Materials Development and Service Center, Jishou 416000, Hunan, China）
Abstract: Li 4Ti 5O 12-C with different mass fractions of carbon were prepared by in-situ composite method
using glucose as carbon sources, Li 2 CO 3 and TiO 2 as staring materials. The structure and surface morphology of
the prepared composite materials were characterized by X-ray diffraction (XRD) and scanning electron
microscope (SEM). The electrochemical performances were investigated using constant-current charge-
discharge and electrochemical impedance spectroscopy (EIS). The results showed that the synthesized
Li 4Ti 5O 12-C composite particles were homogeneous without impure phase. Among these samples, Li 4Ti 5O 12
with 3% mass fraction of carbon showed the highest first discharge capacity of 185.9 mA·h/g when
discharging at 0.5 C rate, and the specific capacity remained 161.5 mA·h/g after 50 cycles with a capacity
retention of 86.9%. However, the first specific discharge capacity was 106.9 mA·h/g when discharging at
4.0 C rate. Compared with the other samples, Li 4Ti 5O 12 with 3% mass fraction of carbon gave the smallest
potential difference of 278.6 mV between the oxidation and reduction reaction. Its solution impedance was
6.198 Ω, and charge transfer resistance was 187.2 Ω. Li 4Ti 5O 12 with 3% mass fraction of carbon exhibited
the best electrochemical performances.
Key words: lithium-ion batteries; Li 4 Ti 5 O 12; surface modification; electrochemistry; in situ composite method;
electro-organic chemistry and industry
Foundation items: National Natural Science Foundation of China (21263004,51762016); Graduate School
Research Project of Jishou University (Jdy16017); Postraduate Research and Innovation Project of

收稿日期：2017-06-14; 定用日期：2017-11-13; DOI: 10.13550/j.jxhg.20170490
基金项目：国家自然科学基金（21263004,51762016）；吉首大学研究生校级科研项目（Jdy16017）；“锰锌钒产业技术”协同创新中心
研究生科研创新课题；吉首大学化学化工学院研究生专项科研课题
作者简介：于小林（1991—），女，硕士生。联系人：吴显明（1967—），男，博士，教授，电话：0743-8563911，E-mail：xianmingwu@163.com。