| 溶胶凝胶法制备AZO包覆MgMn2O4及其电化学性能 |
| Improved Electrochemical Properties of MgMn2O4 Through AZO-Coating via Sol-gel Method |
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| 摘要: 通过X射线衍射（XRD）、扫描电镜（SEM）和充放电测试等方法研究了铝掺杂氧化锌（AZO）包覆对其材料结构、形貌以及电化学性能的影响。研究结果表明，AZO包覆能够引起Mn的平均价态发生一定程度的改变，同时能够显著地减少SEI电阻，从而有效地改善材料的动力学特性；同时，AZO包覆能够有效地遏制材料长循环导致的粉化问题，保持电极导电网络的连续性，进而提高了材料的长期循环稳定性。其中，包覆量为5%（w/w）的MgMn2O4材料200次循环后其可逆比容量仍可达590.3 mAh·g-1，远高于未改性的MgMn2O4材料（295.9 mAh·g-1）及文献报道的结果。 |
| 关键词: 锂离子电池 负极材料 二元锰基尖晶石结构 溶胶凝胶法 AZO |
| 基金项目: |
| Abstract: The effects of AZO coating on its structure, morphology and electrochemical properties of the MgMn2O4 were investigated by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), charge and discharge tests and so on. It is shown that Al-doped ZnO (AZO) coating can effectively improve both the electronic conductivity and Li+ diffusion, consequently improved its rate capability. Moreover, AZO coating can also remain the continuous conductive network of the electrode, therefore improve its cyclic stability. The reversible capacity of 5%(w/w) AZO-coated MgMn2O4 was 590.3 mAh·g-1 after 200 cycles, much higher than that of the bare MgMn2O4 (295.9 mAh·g-1) and the reported value in literatures. |
| Keywords: lithium-ion battery anode material binary manganese-based spinel structure sol-gel method AZO |
| 投稿时间：2019-11-12 修订日期：2020-02-24 |
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| 季崇星,朱德澄,陈亦新,朱贤雨,黄继春,李德成.溶胶凝胶法制备AZO包覆MgMn2O4及其电化学性能[J].无机化学学报,2020,36(5):841-849. |
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