Al掺杂尖晶石LiMn2O4正极材料的性能

doi:10.61558/2993-074X.2954

电化学（中英文） ›› 2013, Vol. 19 ›› Issue (3): 232-236. doi: 10.61558/2993-074X.2954

• 锂离子和燃料电池近期研究专辑（厦门大学董全峰教授主编） • 上一篇下一篇

Al掺杂尖晶石LiMn₂O₄正极材料的性能

王永龙，王文阁，张倩，王昕，曹建胜，叶世海*

南开大学新能源材料化学研究所，天津 300071

收稿日期:2012-10-12 修回日期:2013-01-16 出版日期:2013-06-28 发布日期:2013-01-21
基金资助:
国家自然科学基金项目（No. 21273119）资助

Electrochemical Performance of Al-Doped Spinel LiMn₂O₄ Cathode Material for Li-ion Batteries

WANG Yong-Long, WANG Wen-Ge, ZHANG Qian, WANG Xin, CAO Jian-Sheng, YE Shi-Hai*

Institute of New Energy Material Chemistry, Nankai University, Tianjin 300071, China

Received:2012-10-12 Revised:2013-01-16 Published:2013-06-28 Online:2013-01-21

摘要/Abstract

摘要： 尖晶石LiMn₂O₄作为锂离子电池正极可大电流放电，且成本低、环境友好. 采用溶胶-凝胶法制备尖晶石LiMn₂O₄及Al掺杂材料. 使用X-射线衍射（XRD）和扫描电子显微镜（SEM）观察材料结构与形貌. 结果表明，复合材料颗粒尺寸300 ~ 500 nm，呈类球形. 电化学恒流充放电测试表明，Al掺杂尖晶石LiMn₂O₄电极的循环性明显提高，Al掺杂5%LiMn₂O₄（by mass，下同）正极在1C倍率充放电100周期循环后的容量保持率为98.2%，1C倍率充电、5C倍率放电下，100周期循环后其容量保持率为99.0%，表现出较优的电化学循环性能.

关键词:

锂离子电池, 正极, 尖晶石结构, Al掺杂, 循环性能

Abstract: Spinel LiMn₂O₄, a cathode material for Li-ion batteries, is featured as good high-rate performance, low cost and environmental friendly. The pristine and Al-doped LiMn₂O₄ samples were prepared by sol-gel method. The structure and micromorphology of the as-prepared samples were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The results demonstrated that the as-prepared LiMn₂O₄ samples had a typical cubic spinel structure and were composed of sphere-like particles with a diameter range of 300 ~ 500 nm. Galvanostatic charge-discharge tests showed that the LiMn₂O₄ samples doped with Al element exhibited an enhanced cycling performance. Especially, in the case of LiMn₂O₄ with 5% Al-doped, the discharge capacity retention was about 98.2% at the rate of 1C discharge and was 99% at the rate of 5C discharge, based on the same charge rate of 1C.

Key words:

Li-ion batteries, cathode, spinel structure, Al-doping, cycling performance

中图分类号:

O646

王永龙, 王文阁, 张倩, 王昕, 曹建胜, 叶世海. Al掺杂尖晶石LiMn₂O₄正极材料的性能[J]. 电化学（中英文）, 2013, 19(3): 232-236.

WANG Yong-Long, WANG Wen-Ge, ZHANG Qian, WANG Xin, CAO Jian-Sheng, YE Shi-Hai. Electrochemical Performance of Al-Doped Spinel LiMn₂O₄ Cathode Material for Li-ion Batteries[J]. Journal of Electrochemistry, 2013, 19(3): 232-236.

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https://electrochem.xmu.edu.cn/CN/Y2013/V19/I3/232

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Al掺杂尖晶石LiMn₂O₄正极材料的性能

Electrochemical Performance of Al-Doped Spinel LiMn₂O₄ Cathode Material for Li-ion Batteries

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