三维结构磷酸铁锂纳米线阵列的制备及其电化学性能

发布时间：2018-01-11 02:09

本文关键词：三维结构磷酸铁锂纳米线阵列的制备及其电化学性能　出处：《材料导报》2017年04期 　论文类型：期刊论文

【摘要】：采用阳极氧化铝模板(AAO),通过溶胶-凝胶法制备出磷酸铁锂(LiFePO_4)纳米线阵列。场发射扫描电镜(FESEM)和透射电镜(TEM)表征均说明制得的LiFePO_4阵列是分散均匀且相互平行的。X射线衍射(XRD)和能谱图(EDS)表征均说明LiFePO_4纳米线是纯相橄榄石型结构。电化学性能测试表明纳米线阵列具有较好的循环稳定性,1C电流密度下循环100次后容量几乎不衰减,容量保持率为99.1%,10C电流密度下循环350次后容量保持率为91.6%。纳米线阵列的倍率性能较同等条件下制备的纳米粉体有较大提升,0.1C、10C电流密度下容量可分别达156.4mAh/g、106.9mAh/g。
[Abstract]:Anodic alumina template (AAO) was used. LiFePO4) nanowire arrays were prepared by sol-gel method. Field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM). The characterizations show that the prepared LiFePO_4 arrays are uniformly dispersed and parallel to each other by X-ray diffraction (XRD) and EDS). The LiFePO_4 nanowires are pure olivine structure and the electrochemical performance test shows that the nanowire array has good cyclic stability. At 1C current density, the capacity is almost unchanged after 100 cycles, and the capacity retention rate is 99.1%. The capacity retention rate of the nanowire array is 91.6 after 350 cycles at 10C current density. The performance of nanowire array is much higher than that of nano-powder prepared under the same conditions. At current density of 10C, the capacity can reach 156.4 mAh/ g, 106.9 mAh/ g, respectively.
【作者单位】：清华大学材料学院;深圳大学材料学院;
【分类号】：TB383.1;TM912
【正文快照】： 陈晓萍:女,1990年生,硕士研究生,主要从事锂离子电池磷酸铁锂正极材料的制备研究E-mail:hilary_0323@163.com康飞0引言特殊的磁性和光学特性及良好的力学性能、电化学性能使得近年来三维纳米材料得到了快速的发展和广泛的应用[1-4]。纳米线、纳米棒、纳米带等一维材料作为三维

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