| 氮掺杂硅酸亚铁锂正极材料的制备及电化学性能 |
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| 引用本文： | 张冬,李亭亭,邱海龙,魏英进,王春忠,陈岗,岳惠娟.氮掺杂硅酸亚铁锂正极材料的制备及电化学性能[J].高等学校化学学报,2017,38(9):1633. |
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| 作者姓名： | 张冬 李亭亭 邱海龙 魏英进 王春忠 陈岗 岳惠娟 |
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| 作者单位： | 1. 吉林大学物理学院, 新型电池物理与技术教育部重点实验室, 长春 130012;
2. 吉林大学化学学院, 无机合成与制备化学国家重点实验室, 长春 130012 |
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| 基金项目： | 吉林省科技厅基金(批准号:20150204030GX;20160101320JC)资助. Supported by the Science and Technology Development Planning of Jilin Province |
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| 摘 要： | 采用溶胶-凝胶法制备了氮掺杂的硅酸亚铁锂正极材料.通过X射线衍射（XRD）、扫描电子显微镜（SEM）、X射线光电子能谱（XPS）、充放电测试和交流阻抗测试（EIS）等对材料的结构及电化学性能进行了表征.结果表明，N元素已掺杂到Li2FeSiO4材料晶格中，样品具有较小的颗粒尺寸和优异的动力学性能，表现出较好的充放电比容量和倍率特性，首次放电比容量为130 mA·h/g，循环50次后比容量仍可达到124 mA·h/g，容量保持率高达95%.
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| 关 键 词： | 锂离子电池 正极材料 硅酸亚铁锂 离子掺杂 |
| 收稿时间： | 2017-01-23 |
Preparation and Characterization of N-doped Li2FeSiO4/C Cathode Materials for Lithium Ion Batteries |
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| ZHANG Dong,LI Tingting,QIU Hailong,WEI Yingjin,WANG Chunzhong,CHEN Gang,YUE Huijuan.Preparation and Characterization of N-doped Li2FeSiO4/C Cathode Materials for Lithium Ion Batteries[J].Chemical Research In Chinese Universities,2017,38(9):1633. |
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| Authors: | ZHANG Dong LI Tingting QIU Hailong WEI Yingjin WANG Chunzhong CHEN Gang YUE Huijuan |
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| Institution: | 1. Key Laboratory of Physics and Technology for Advanced Batteries, Ministry of Education, College of Physics, Jilin University, Changchun 130012, China;
2. State Key Laboratory of Inorganic Synthesis and Preparative Chemistry, College of Chemistry, Jilin University, Changchun 130012, China |
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| Abstract: | N-doped lithium iron silicates(N-doped Li2FeSiO4, N-LFs) was prepared with sol-gel method. X-Ray diffraction, field emission scanning electron microscopy, X-ray photoelectron spectroscopy, galvanosta-tic charge-discharge and electrochemical impedance spectra were used to investigate the effect of nitrogen do-ping on the characteristics of Li2 FeSiO4 . The results show that nitrogen does enter the cystal strucutre of Li2 FeSiO4 , resulting in smaller particle size and better kinetic properties, as well as higher specific capacity and rate capability. The doped sample could deliver a specific capacity of 130 mA·h/g in the first discharge and retain 124 mA·h/g after 50 cycles with the retention of 95％. |
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| Keywords: | Lithium ion battery Cathode material Li2 FeSiO4 Ion-doping |
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