Crystallinity dependence of electrochemical properties for LiFePO4
Crystallinity dependence of electrochemical properties for LiFePO4
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DOI：
10.1007/s12598-013-0186-y
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发表时间：
2015-05
期刊：
影响因子：
8.8
通讯作者：
Ting Zhao;Xiangjun Zhang;Xiang Li;Shi-gang Lu
中科院分区：
文献类型：
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作者：
Ting Zhao;Xiangjun Zhang;Xiang Li;Shi-gang Lu
采用固相反应法在不同温度和时间下制备了LiFePO4复合材料。采用X射线衍射（XRD）和扫描电镜（SEM）对复合材料的晶体结构和形貌进行了分析，采用X射线吸收光谱（XAS）对复合材料的结晶度进行了表征。实验结果表明，电化学性能并不是随着粒径的减小而单调地变好，传统的长反应时间是不必要的。此外，XAS是发现结晶度变化的有效技术。
LiFePO4composites were prepared by solid state reactions at different temperatures and time. The crystalline structure and morphology of the composites were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM), while X-ray absorption spectroscopy (XAS) was employed to characterize the crystallinity. Experimental results show that the electrochemical properties do not monotonously get better with the decrease of particle size and the traditional long reaction time is needless. Moreover, XAS is an effective technique to discover the change in crystallinity.