采用阳极氧化铝模板(AAO),通过溶胶-凝胶法制备出磷酸铁锂(LiFePO4)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LiFePO4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LiFePO4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.
The LiFePO4 nanowire arrays was successfully fabricated by a sol-gel method using anodic oxide aluminum (AAO) as the template.The field emission scanning electron microscopy (FESEM) and transmission electron microscopy (TEM) images showed the synthesized LiFePO4 nanowire arrays were monodispersed and parallel to one another.The X-ray diffraction (XRD) and energy dispersive spectrometer (EDS) investigations jointly demonstrated a pure olivine structure of the synthesized LiFePO4 nanowire arrays.The LiFePO4 nanowire arrays also showed excellent electrochemical performance as cathode materials of lithium ion battery.Compared with nanoparticles prepared by the same condition,the nanowire arrays exhibited desirable rate performance (156.4 mAh/g at 0.1C and 106.9 mAh/g at 10C) and excellent cycle stability (99.1％ after 100 cycles at 1C and 91.6％ after 350 cycles at 10C).
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