Sodium Alginate Directed Synthesis of ZnFe2O4 with Micro-nano Structure and Its Performance in Lithium Ion Batteries†
Qiuxian WangKai LiBeining YangHongyun YueShuting Yang
Abstract
使用海藻酸钠作为结构导向剂，通过溶剂热法原位合成了不同形貌的含碳ZnFe 2 O 4 锂离子电池负极材料.利用扫描电子显微镜（SEM）、透射电子显微镜（TEM）、X射线衍射（XRD）和拉曼（Raman）光谱等对复合材料的形貌和结构进行表征，通过恒电流充放电、循环伏安曲线（CV）和交流阻抗谱（EIS）等对复合材料的电化学性能进行了测试.结果表明，在不同形貌的复合材料中，具有类蒲公英状纳微复合结构的含碳ZnFe 2 O 4 的电化学性能最佳：在1000 mA/g的电流密度下循环100周后依然保持2100 mA·h/g的比容量.还探讨了海藻酸钠在材料形成和制作极片过程中的作用及其对电池性能的影响.
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