以Fe2O3为铁源制备LiFePO4/C及其电化学性能
Preparation and electrochemical performance of LiFePO4/C using Fe2O3 as raw material
以Fe2O3和LiH2PO4为原料，聚丙烯为还原剂和碳源，采用一步固相法制备了LiFePO4/C复合正极材料，研究了不同温度对合成材料电化学性能的影响。利用X射线衍射(XRD)、扫描电子显微镜(SEM)等测试手段对合成材料进行了表征，通过恒电流充放电测试研究了材料的电化学性能。结果表明：于700 C下制备的LiFePO4/C复合材料在0.1、1、5 C倍率下的首次放电比容量分别为160.4、143、108.3 mAh/g。在1 C 和5 C 经100次循环后，放电比容量分别为138.5和100.2 mAh/g，表现出良好的高倍率循环性能。
LiFePO4/C composites were synthesized by one-step solid-state reaction using Fe2O3 and LiH2PO4 as raw materials, and polypropylene as reductive agent and carbon source. The effect of synthesis temperature on the electrochemical performance of the LiFePO4/C composites was studied. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and so on. The electrochemical properties of the samples were investigated by galvanostatic tests. The results show that the sample synthesized at 700 C exhibits a first discharge capacity of 160.4, 143, 108.3 mAh/g at 0.1, 1 C and 5 C respectively. The sample also exhibits a good rate capability. After 100 cycles at 1 C and 5 C, the specific capacities of 138.5 and 100.2 mAh/g are still maintained.
曹高劭、赵新兵、张交辉、邬春阳、谢健
材料科学电化学工业
锂离子电池磷酸铁锂三氧化二铁聚丙烯电化学性能
Lithium ion batteryLiFePO4Fe2O3PolypropyleneElectrochemical performance
曹高劭,赵新兵,张交辉,邬春阳,谢健.以Fe2O3为铁源制备LiFePO4/C及其电化学性能[EB/OL].(2011-10-06)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201110-27.点此复制
评论