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[1]王禹,张栩,李悦,等.Li+电池正极材料Li2FeTiO4/CNTs的制备与电化学性能表征[J].南京工业大学学报(自然科学版),2016,38(04):21-27.[doi:10.3969/j.issn.1671-7627.2016.04.005]
 WANG Yu,ZHANG Xu,LI Yue,et al.Synthesis and electrochemical performance of Li2FeTiO4/CNTs as cathode materials for Li-ion batteries[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(04):21-27.[doi:10.3969/j.issn.1671-7627.2016.04.005]
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Li+电池正极材料Li2FeTiO4/CNTs的制备与电化学性能表征()
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《南京工业大学学报(自然科学版)》[ISSN:1671-7627/CN:32-1670/N]

卷:
38
期数:
2016年04期
页码:
21-27
栏目:
出版日期:
2016-07-10

文章信息/Info

Title:
Synthesis and electrochemical performance of Li2FeTiO4/CNTs as cathode materials for Li-ion batteries
文章编号:
1671-7627(2016)04-0021-07
作者:
王禹张栩李悦汪敏杨猛马立群
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
WANG YuZHANG XuLI YueWANG MinYANG MengMA Liqun
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
正极材料 Li2FeTiO4 钛酸盐 CNTs
Keywords:
cathode materials Li2FeTiO4 titanate materials CNTs
分类号:
TM911
DOI:
10.3969/j.issn.1671-7627.2016.04.005
文献标志码:
A
摘要:
采用固相法合成Li2FeTiO4正极材料并添加CNTs对其进行复合改性,得到Li2FeTiO4/CNTs复合材料。采用X线衍射分析(XRD)、场发射扫描电子显微分析(FESEM)以及电化学测试等手段表征Li2FeTiO4正极材料的微观结构和电化学性能。结果表明:固相法合成的Li2FeTiO4具有低温单斜结构,添加CNTs后,电化学性能有了明显的提升。在10 mA/g的电流密度下,Li2FeTiO4/CNTs首次充放电容量分别为165.8和149.7 mA·h/g,实现了大于1个Li+的可逆脱出与嵌入; Li2FeTiO4/CNTs复合材料具有较好的高倍率性能,1 C下的放电容量为61.8 mA·h/g,而未添加CNTs的Li2FeTiO4容量仅为37.5 mA·h/g。
Abstract:
The Li2FeTiO4 composite materials were synthesized by a solid phase method and modified by adding multi-walled carbon nanotubes.The electrochemical properties, micro-structures of Li2FeTiO4 and Li2FeTiO4/CNTs electrode materials were investigated by X-ray diffraction(XRD),field-emission scanning electron microscope(FESEM)and electrochemical tests.Results indicated that the prepared Li2FeTiO4 sample consisted of a monoclinic Li2FeTiO4.The prepared Li2FeTiO4/CNTs electrode exhibited high initial charge capacity of 165.8 mAh/g and discharge capacity of 149.7 mA·h/g at a current rate of 10 mA/g,indicated that more than 1 lithium per unit could be reversibly inserted and deintercalated during cycling.At the high rate of 1 C,the Li2FeTiO4/CNTs electrode showed the discharge capacity of 61.8 mA·h/g,while the Li2FeTiO4 electrode delivered the discharge capacity of 37.5 mA·h/g.

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备注/Memo

备注/Memo:
收稿日期:2015-04-15
基金项目:国家自然科学基金(51404142); 江苏省自然科学基金(BK20140936); 教育部高等学校博士点基金(20133221110009); 江苏高校优势学科建设工程
作者简介:王禹(1990—),女,江苏南京人,硕士,主要研究方向为新能源材料; 马立群(联系人),教授,E-mail: maliqun@njtech.edu.cn.
引用本文:王禹,张栩,李悦,等.Li+电池正极材料Li2FeTiO4/CNTs的制备与电化学性能表征[J].南京工业大学学报(自然科学版),2016,38(4):21-27..
更新日期/Last Update: 2016-07-10