电化学2013，Vol.19Issue(2)：146-150,5.
水溶-蒸发法制备LiFePO4/C及其电化学性能研究
Electrochemical Performance of LiFePO4/C Synthesized via Aqueous Solution-Evaporation Route
摘要
Abstract
The LiFePO4/C samples have been synthesized via an aqueous solution-evaporation route with LiH2PO4, FeC2O4·2H2O as raw materials and citric acid as a carbon source. X-ray diffraction(XRD), scanning electron microscopy(SEM), and transmission electron microscopy(TEM) were used to analyze structure and morphology of the samples. The electrochemical performances of the LiFePO4/C cathodes were characterized by charge/discharge curves and electrochemical impedance spectroscopy(EIS). The results show that the LiFePO4/C sample, calcined at 700 ℃ and contained 3.03% (by mass) carbon, exhibited a highly pure crystalline phase with the primary particles sizes of 100 nm. The surfaces of those particles were covered by a carbon layer of 5 run in thickness. At the rates of 0.5C, 2C, 5C, and 10C, where 1C corresponds to 170 mA·g-1, the discharge capacities of 148.2, 142.4, 127.4, and 108.5 mAh·g-1, were delivered, respectively, with the perfect cycling stabilities.关键词
锂离子电池/正极材料/LiFePO4/C/柠檬酸Key words
lithium-ion batteries/ cathode material/ LiFePO4/C/ citric acid分类
化学化工引用本文复制引用
古宁宇,何兴华,李洋..水溶-蒸发法制备LiFePO4/C及其电化学性能研究[J].电化学,2013,19(2):146-150,5.基金项目
江西省科技支撑项目(No.2010BGB01001)、江西省自然科学基金(No.20122BAB203014)及江西省教育厅科技项目(No.GJJ12042)资助 （No.2010BGB01001）
