Abstract: In this paper, the carbon coating modification of lithium titanate was carried out by using glucose as the organic carbon source. The Li4Ti5O12 @C composite was synthesized by hydrothermal method. The structure of the composite was characterized by XRD, SEM and TEM. The constant current charge and discharge test method and EIS were used to test the electrochemical performance of composite materials. The experimental results show that Li4Ti5O12 particles are uniformly distributed and uniformly coated by amorphous carbon layer. Proper carbon content can effectively alleviate the Li4Ti5O12 agglomeration. The first discharge specific capacity of the composite with 7.5% carbon content is 225 mAh/g at 0.1 A/g. After 200 cycles, the discharge specific capacity remains stable at 193 mAh/g, and the Coulomb efficiency is 99.9%. The composite shows excellent rate performance and cycle stability.
作者简介: 王鸣,辽宁工程技术大学材料科学与工程学院副教授、硕士研究生导师。2005年7月本科毕业于东北大学材料与冶金学院,2011年7月在中国科学院金属研究所-东北大学联合培养取得材料学博士学位,2011—2013 年在德国伊尔梅瑙工业大学进行博士后工作,2016—2017年在澳大利亚昆士兰科技大学作访问学者。主要从事锂离子电池负极材料的制备与表征、纳米层状材料的力学变形行为与可靠性研究。近年来,发表论文 30 余篇,包括Scripta Materialia、Applied Physical Letters、Applied Surface Science、Journal of the European Ceramic Society 和Materials Science and Engineering A等。
引用本文:
王鸣, 黄俊涛, 程丽丽, 周律法, 任亚航, 王学雷. 锂离子电池负极用Li4Ti5O12@C复合材料的制备及电化学性能[J]. 材料导报, 2020, 34(Z2): 19-23.
WANG Ming, HUANG Juntao, CHENG Lili, ZHOU Lyufa, REN Yahang, WANG Xuelei. Preparation and Electrochemical Performance of Li4Ti5O12@C Composites for Negative Electrode of Lithium Ion Battery. Materials Reports, 2020, 34(Z2): 19-23.
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2020, Vol. 34 
