| 离子交换法制备LiCexEu1-xTiO4及其结构与电化学性能 |
| Structure and Electrochemical Properties of LiCexEu1-xTiO4 through Ion Exchange Method |
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| 摘要: 选用六水合硝酸铈作为Ce源，利用溶胶凝胶结合离子交换法，成功合成了LiCexEu1-xTiO4，并利用X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、循环伏安（CV）和充放电循环测试等方法对LiCexEu1-xTiO4的结构、形貌和电化学性能方面做了系统地表征。研究结果表明，与未掺杂的LiEuTiO4相比，在晶格中引入Ce3+能显著改善材料的动力学性能，这可能与Ce-Eu-Ti协同效应有关。这种协同效应表现为晶格参数的复杂变化导致Ti和Ce处于混合价态。其中LiEu0.995Ce0.005TiO4的电化学性能最好。 |
| 关键词: 锂离子电池 负极材料 钙钛矿结构 离子交换法 电化学性能 |
| 基金项目: |
| Abstract: Using Cerium (Ⅲ) nitrate hexahydrate as Ce source, LiCexEu1-xTiO4 was synthesized by sol-gel and ion exchange method. The structural, morphological and electrochemical properties of LiCexEu1-xTiO4 were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), X-ray photoelectron spectroscopy (XPS), cyclic voltammogram (CV), and charge-discharge cycling tests. The results show that the introduction of Ce3+ into the lattice can significantly improve the dynamic properties of the material, which is probably related to Ce-Eu-Ti synergistic effect. This synergistic effect appears as the complicated modulations in terms of lattice parameters and resulted in Ti and Ce in mixed valences. LiEu0.995Ce0.005TiO4 shows the best electrochemical performances. |
| Keywords: lithium-ion battery anode material perovskite structure ion-exchange method electrochemical performance |
| 投稿时间：2020-04-30 修订日期：2020-06-28 |
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| 朱德澄,陈亦新,季崇星,朱贤雨,李德成.离子交换法制备LiCexEu1-xTiO4及其结构与电化学性能[J].无机化学学报,2020,36(10):1925-1933. |
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