锂离子电池正极材料LiFePO4/C的制备与表征

journal6 ›› 2004, Vol. 25 ›› Issue (3): 64-67.

锂离子电池正极材料LiFePO₄/C的制备与表征

(吉首大学化学化工学院，湖南吉首 416000)

出版日期:2004-09-15 发布日期:2012-09-22
作者简介:麻明友(1965-),男(苗族),吉首大学化学化工学院高级实验师,主要从事材料化学研究.
基金资助:
湖南省自然科学基金资助项目(03JJY6005)；湖南省教育厅科研基金资助项目(02C308)

Preparation and Characterization of LiFePO₄/C as Cathode Material for Lithium Ion Batteries

（College of Chemistry and Chemical Engineering, Jishou Uinversity,Jishou 416000,Hunan China）

Online:2004-09-15 Published:2012-09-22

摘要/Abstract

摘要：采用溶胶-凝胶法合成了LiFePO₄/C复合材料，利用元素分析、X射线衍射（XRD）、扫描电镜（SEM）等方法对其进行了表征，将其组装成模拟电池测试了其电化学性能.结果表明：LiFePO₄/C具有单一的橄榄石型晶体结构，碳粒子平均颗粒大小在1μm左右.LiFePO₄/C复合材料在3.4 V处具有很好的充放电电压平台，与LiFePO₄相比，具有更高的放电比容量和更好的循环性能，在60 ℃时的首次放电容量达到133 mAh/g，经20次循环后的容量保持率为93.8%.

关键词： 锂离子电池, 正极材料, 磷酸亚铁锂, 复合材料

Abstract: LiFePO₄/C composite cathode materials for lithium-ion battery were synthesized by sol-gel method, and characterized by element analysis,X-ray diffraction (XRD), scanning electron microscopy (SEM). The electrochemical properties were tested using analogous cells. Results showed that LiFePO₄/C were simple pure olive-type phase with uniform particle size of 1μm. LiFePO₄/C showed a good charge-discharge voltage plateau at 3.4 V and higher capacity and better cyclability compared with LiFePO₄.The first specific discharge capacities were 133 mAh/g, and 93.8% of which retained after 20 times cycling at 60 ℃.

Key words: Li-ion batteries, cathode materials, lithium iron phosphate, composites

麻明友. 锂离子电池正极材料LiFePO₄/C的制备与表征[J]. journal6, 2004, 25(3): 64-67.

MA Ming-You. Preparation and Characterization of LiFePO₄/C as Cathode Material for Lithium Ion Batteries[J]. journal6, 2004, 25(3): 64-67.

参考文献

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锂离子电池正极材料LiFePO₄/C的制备与表征

Preparation and Characterization of LiFePO₄/C as Cathode Material for Lithium Ion Batteries

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