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[1]汪敏,杨猛,马立群,等.Ti掺杂对锂离子电池正极材料Li2FeSiO4结构及电化学性能影响[J].南京工业大学学报(自然科学版),2016,38(02):64-69.[doi:10.3969/j.issn.1671-7627.2016.02.013]
 WANG Min,YANG Meng,MA Liqun,et al.Effects of Ti doping on structure and electrochemical properties of cathode material Li2FeSiO4 for Li-ion battery[J].Journal of NANJING TECH UNIVERSITY(NATURAL SCIENCE EDITION),2016,38(02):64-69.[doi:10.3969/j.issn.1671-7627.2016.02.013]
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Ti掺杂对锂离子电池正极材料Li2FeSiO4结构及电化学性能影响()
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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02期
页码:
64-69
栏目:
出版日期:
2016-04-10

文章信息/Info

Title:
Effects of Ti doping on structure and electrochemical properties of cathode material Li2FeSiO4 for Li-ion battery
文章编号:
1671-7627(2016)02-0064-06
作者:
汪敏杨猛马立群王禹张栩李悦沈晓冬
南京工业大学 材料科学与工程学院,江苏 南京 210009
Author(s):
WANG MinYANG MengMA LiqunWANG YuZHANG XuLI YueSHEN Xiaodong
College of Materials Science and Engineering,Nanjing Tech University,Nanjing 210009,China
关键词:
锂离子电池 正极材料 Li2FeSiO4 Ti掺杂
Keywords:
Li-ion batteries cathode materials Li2FeSiO4 Ti doping
分类号:
TM911
DOI:
10.3969/j.issn.1671-7627.2016.02.013
文献标志码:
A
摘要:
以钛酸四丁酯为掺杂剂,抗坏血酸为碳源,采用溶胶-凝胶法合成Ti4+掺杂的锂离子电池正极材料Li2FeSiO4。通过X线衍射(XRD)、场发射扫描电子显微镜(FESEM)、高频红外碳-硫分析仪、循环伏安及恒电流充放电测试等表征手段分析了Ti元素掺杂对Li2FeSiO4结构、形貌、放电容量、循环稳定性的影响。结果表明:掺Ti减小了Li2FeSiO4颗粒尺寸,增加了其与电解液间的接触面积,提高了锂离子的迁移率,从而提高了放电容量。在10 mA/g电流密度下,Ti掺杂的试样首次充放电容量分别为206.9 mA·h/g和172 mA·h/g; 未掺杂的试样的充放电电容量分别为169.1 mA·h/g和143.7 mA·h/g。
Abstract:
Ti-doped cathode material Li2FeSiO4 for Li-ion battery was synthesized by a sol-gel method using ingtetrabutyl titanate as a dopant and ascorbic acid as carbon source.The effects of Ti doping on structure,morphology,discharge capacity, and cycling stability were characterized by X-ray diffraction(XRD),field emission scanning electron microscope(FESEM),cyclic voltammogram, and galvanostatic charge-discharge measurement.Results showed that Ti doping decreased particle size,increased the contact area between particles and electrolyte and enhanced lithium ion mobility,thus improving the discharge capacity of Li2FeSiO4.At the current density of 10 mA/g,the initial charge and discharge capacities for the doped sample were 206.9 mA·h/g and 172 mA·h/g,while the undoped samples were 169.1 mA·h/g and 143.7 mA·h/g,respectively.

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备注/Memo

备注/Memo:
收稿日期:2014-12-25
基金项目:教育部高等学校博士点基金(20133221110009); 国家自然科学基金(51404142); 江苏高校优势学科建设工程
作者简介:汪敏(1988—),女,江苏盐城人,博士生,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; 沈晓冬(联系人),教授,E-mail:xdshen@njtech.edu.cn.
引用本文:汪敏,杨猛,马立群,等.Ti掺杂对锂离子电池正极材料Li2FeSiO4结构及电化学性能影响[J].南京工业大学学报(自然科学版),2016,38(2):64-69..
更新日期/Last Update: 2016-03-20