The effect of heat preservation time on the electrochemical properties of LiFePO4

1st International Conference on Frontiers of Materials Synthesis and Processing

材料科学;化学

He, Rui^1,2 ; Zhang, Lihui^1,2 ; Bai, Xue^1,2 ; Liu, Zhenfa^1,3

Institute of Energy Resources, Hebei Academy of Science, Hebei Province, China^1

Hebei Engineer Research Center for Water Saving in Industry, Shijiazhuang, China^2

School of Chemical Engineering, Hebei University of Technology, Tianjin, China^3

关键词: Charge/discharge test;    Discharge capacities;    Electrochemical performance;    Heat preservation time;    High temperature solid state methods;    Initial discharge capacities;    Small particles;    Structure and morphology;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/274/1/012105/pdf
DOI  :  10.1088/1757-899X/274/1/012105

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

LiFePO4was prepared via high temperature solid-state method at different heat preservation time. XRD and SEM was used to test the structure and morphology of LiFePO4. Land 2001 was used to test the electrochemical performance of LiFePO4. The results illustrated that well-crystallized LiFePO4composite with homogeneous small particles was obtained by XRD and SEM. And the optimum heat preservation time was 4 hour. From charge/discharge test, it can be seen that at 0.2C, LiFePO4has initial discharge capacities of 159.1mAh/g at the heat preservation time 4 hour. From the rate capacity, it can be seen that the discharge capacity was of optimum sample remains above 99% after 200 cycles.