温度对水浴合成3D微纳结构FePO_4的影响

Influence of temperature to 3D micro-nano-structure FePO_4 for Li-ion batteries via a water-bath method

研究了水浴反应合成由纳米片自组装成类球形3D微纳结构的FePO_4·2 H_2O锂离子电池正极材料,发现温度会对其前驱体生成产生影响。使用X射线衍射(XRD)、扫描电子显微镜(SEM)对产物的晶型和形貌结构进行表征,表明该3D微纳结构FePO_4·2 H_2O是由长约100 nm、厚约30 nm的纳米片自组装而成。将各温度条件下合成的FePO_4·2 H_2O材料进行锂化后得到LiFePO_4,对其在0.1下进行电化学性能测试,综合分析数据,发现最佳反应温度为100℃。

In this paper,the influence of temperature to 3D"Micro-nano-structure"FePO4·2 H2O cathode materials for Li-ion batteries was investigated via a water-bath method.The XRD and SEM results revealed that the 3D"Micro-nano-structure"FePO4·2 H2O was self-assembled by nanoplates with a size about 100 nm length and 30 nm thick.Moreover,the electrochemical performance of all samples in different temperature was tested at 0.1 C chargedischarge rate.The results showed that the optimum reaction temperature was 100℃.