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个人信息Personal Information
教授
博士生导师
硕士生导师
任职 : 化学工程与技术一级学科点点长
性别：女
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：应用化学. 精细化工. 有机化学
办公地点：大连市高新区凌工路2号西部校区化工楼E434房间
联系方式：0411-84986265
电子邮箱：zhangshf@dlut.edu.cn
Enhanced low temperature electrochemical performances of LiFePO4/C by V(3+)and F- co-doping
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论文类型：期刊论文
发表时间：2018-10-15
发表刊物：MATERIALS LETTERS
收录刊物：SCIE
卷号：229
页面范围：349-352
ISSN号：0167-577X
关键字：LiFePO4; Doping; Low temperature; Nanoparticles; Composite materials; Microstructure
摘要：V3+ and F co-doped LiFePO4/C cathode materials are prepared via a facile wet milling-spray drying-carbothermal reduction (WSC) process. The obtained products have bowl-like morphologies with the diameters from 5 to 10 mu m, which are composed of numerous nanoparticles smaller than 100 nm integrated by carbon network. The effects of ion doping are studied. V3+ and F co-doped LiFePO4/C shows improved electrochemical performance, which delivers a discharge capacity of 136 mAh.g(-1) (10 C) at 20 degrees C. At 0 degrees C, a capacity of 86 mAh.g(-1) (10 C) can be obtained, which is 20 mAh.g(-1) higher than LiFePO4/C. In addition, the V3+ and F co-doped LiFePO4/C shows excellent cycle performances. The improved performance of V3+ and F co-doped LiFePO4/C is due to the low charge transfer resistance, enhanced electrical conductivity and the holes on the surface of particles which can provide more ion transport channel. (C) 2018 Published by Elsevier B.V.