| 溶胶凝胶法制备AZO包覆MgMn2O4及其电化学性能 |
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| 引用本文： | 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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| 作者姓名： | 季崇星 朱德澄 陈亦新 朱贤雨 黄继春 李德成 |
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| 作者单位： | 苏州大学能源学院, 苏州 215006,苏州大学能源学院, 苏州 215006,苏州大学能源学院, 苏州 215006,苏州大学能源学院, 苏州 215006,苏州大学能源学院, 苏州 215006,苏州大学能源学院, 苏州 215006 |
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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。
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| 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 |
| 收稿时间： | 2019/11/12 0:00:00 |
| 修稿时间： | 2020/2/24 0:00:00 |
Improved Electrochemical Properties of MgMn2O4 Through AZO-Coating via Sol-gel Method |
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| JI Chong-Xing,ZHU De-Cheng,CHEN Yi-Xin,ZHU Xian-Yu,HUANG Ji-Chung and LI De-Cheng.Improved Electrochemical Properties of MgMn2O4 Through AZO-Coating via Sol-gel Method[J].Chinese Journal of Inorganic Chemistry,2020,36(5):841-849. |
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| Authors: | JI Chong-Xing ZHU De-Cheng CHEN Yi-Xin ZHU Xian-Yu HUANG Ji-Chung and LI De-Cheng |
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| Institution: | College of Energy, Soochow University, Suzhou, Jiangsu 215006, China,College of Energy, Soochow University, Suzhou, Jiangsu 215006, China,College of Energy, Soochow University, Suzhou, Jiangsu 215006, China,College of Energy, Soochow University, Suzhou, Jiangsu 215006, China,College of Energy, Soochow University, Suzhou, Jiangsu 215006, China and College of Energy, Soochow University, Suzhou, Jiangsu 215006, China |
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| 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. |
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| Keywords: | lithium-ion battery anode material binary manganese-based spinel structure sol-gel method AZO |
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