Synthesis of FePO4·xH2O for fabricating submicrometer structured LiFePO4/C by a co-precipitation method
Synthesis of FePO4·xH2O for fabricating submicrometer structured LiFePO4/C by a co-precipitation method
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DOI：
10.1016/j.ceramint.2013.10.055
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发表时间：
2014-03
影响因子：
5.2
通讯作者：
Yongming Zhu;Shenzhi Tang;Haihao Shi;Huili Hu
中科院分区：
文献类型：
--
作者：
Yongming Zhu;Shenzhi Tang;Haihao Shi;Huili Hu
以Fe（NO3）3和（NH 4）2 HPO 4为原料，采用配位沉淀法在高温下合成了非晶态水合磷酸铁。采用XRD和SEM对水合磷酸铁样品和相应的LiFePO 4/C产物进行了表征。采用循环伏安法（CV）和电化学阻抗谱（EIS）研究了其电化学行为。由合成的FePO 4制备的LiFePO 4/C在0.1C、0.2C、0.5C、1C、2C、3C和4C倍率下的放电容量分别为162.5、147.3、133.0、114.7、97.2、91.3和88.5 mAh g− 1，并且具有令人满意的容量保持率。
Amorphous hydrated iron (III) phosphate has been synthesized by a coordinate precipitation method from equimolecular Fe(NO3)3and (NH4)2HPO4solutions at an elevated temperature. Hydrated iron (III) phosphate samples and the corresponding LiFePO4/C products were characterized by XRD and SEM. The electrochemical behavior was studied by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The LiFePO4/C fabricated from as-synthesized FePO4delivered discharge capacities of 162.5, 147.3, 133.0, 114.7, 97.2, 91.3 and 88.5 mAh g−1at rates of 0.1C, 0.2C, 0.5C, 1C, 2C, 3Cand 4Cwith satisfactory capacity retention, respectively.