西安理工大学学报2016，Vol.32Issue(1)：96-99,105,5.DOI:10.19322/j.cnki.issn.1006-4710.2016.01.017
锂离子电池正极材料LiFePO4/C的制备及电化学性能研究
Fabrication and electrochemical properties of LiFePO4/C cathode materials
摘要
Abstract
The olivine-structured LiFePO4/C cathode material is synthesized with glucose and cit-ric acid as carbon sources via the carbothermal reduction method.X-ray diffraction (XRD)and transmission electron microscopy (TEM)are used to carry out the analysis of the product struc-ture surface and micro-morphology. The product electrochemical properties are characterized through the galvanostatic charge-discharge tests and electrochemical impedance spectroscope (EIS).The product capacity attenuation is discussed.The results show that the product of glu-cose as carbon source has good crystallinity with small grain size.Galvanostatic charge-discharge tests indicate that it has better electrochemical performance:The initial discharge capacity is 140.2 mAh/g at 0.2 C rate,almost no attenuation after 50 cycles.The capacity at 1 C reaches 120.5 mAh/g.In addition,electrochemical impedance spectroscope shows that the diffusion coef-ficient of LiFePO4/C decreases at the process of high rate,about 1.798×10-12 cm2/s.关键词
正极材料/磷酸铁锂/碳热还原/容量衰减Key words
cathode material/LiFePO4/C/carbothermal reduction/capacity attenuation分类
信息技术与安全科学引用本文复制引用
徐可,游才印,王钦,张卫华,郭少华..锂离子电池正极材料LiFePO4/C的制备及电化学性能研究[J].西安理工大学学报,2016,32(1):96-99,105,5.基金项目
国家国际科技合作专项基金资助项目(2015DFR50350) （2015DFR50350）
陕西省自然科学基金资助项目(2013JQ6008) （2013JQ6008）
