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| 锰酸锂改性及其电化学性能研究 | |
| 引用本文： | 高明,孙晓刚,程利,吁霁.锰酸锂改性及其电化学性能研究[J].材料导报,2011,25(18):63-65. |
| 作者姓名： | 高明 孙晓刚 程利 吁霁 |
| 作者单位： | 1. 南昌大学机电学院,南昌,330031 2. 南昌大学机电学院,南昌330031;南昌太阳纳米技术有限公司,南昌330031 3. 南昌大学理学院,南昌,330031 |
| 基金项目： | 国家自然科学基金(60661001); 江西省教育厅2009科研项目 |
| 摘 要： | 以多壁碳纳米管(Multi-walled carbon nanotubes,MWCNTs)为添加相,对锰酸锂进行电化学性能改进,采用扫描电子显微镜对其进行观察,发现掺入的多壁碳纳米管均匀分布在锰酸锂颗粒表面。以改性后的锰酸锂为主要材料制成纽扣电池,采用交流阻抗及恒电流充放电等技术进行检测。结果表明,掺入1%MWCNTs后LiMn2O4的初始放电容量由改性前的123mAh/g下降到改性后的117mAh/g,在25℃经10次循环后容量保持率为97%,明显高于未掺入的91%。与未掺杂的LiMn2O4相比,虽然掺C或掺CNTs都使初始充放电容量有所降低,但是其循环性能明显提高。 |
| 关 键 词： | 锰酸锂 多壁碳纳米管 循环性能 |
Investigation of Electrichemical Properties of Modified LiMn_2O_4 |
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| GAO Ming,SUN Xiaogang,CHENG Li,YU Ji.Investigation of Electrichemical Properties of Modified LiMn_2O_4[J].Materials Review,2011,25(18):63-65. | |
| Authors: | GAO Ming SUN Xiaogang CHENG Li YU Ji |
| Affiliation: | GAO Ming1,SUN Xiaogang1,2,CHENG Li1,YU Ji3(1 School of Mechanical and Electrical Engineering,Nanchang University,Nanchang 330031,2 Sun Nanotech Co Ltd,3 School of Science,Nanchang 330031) |
| Abstract: | The experiment take multi-walled carbon nanotubes(MWCNTs) as adding phase to improve the electrochemical performance of LiMn2O4.Scanning electron microscope(SEM) oboservation demostrated that the multi-walled carbon nanotubes were evenly distributed on LiMn2O4 granular surface.With the modified LiMn2O4 as main cathod materials to make button batteries.The properties of the battery were measured by adopting ac impedance and constant current charge-discharge method.The results show that the initial discharge ... |
| Keywords: | LiMn2O4 MWCNTs cycle performance |
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