| 水解法制备掺氟硅酸亚铁锂正极材料 |
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| 引用本文： | 陈梅蓉,施继成,张雅娴,常美娟,李秀华,童庆松. 水解法制备掺氟硅酸亚铁锂正极材料[J]. 吉林化工学院学报, 2011, 28(5): 10-14 |
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| 作者姓名： | 陈梅蓉 施继成 张雅娴 常美娟 李秀华 童庆松 |
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| 作者单位： | 福建师范大学,化学与材科学院,福建,福州,350007 |
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| 基金项目： | 国家自然科学基金资助项目(20973038); 福建省发改委资助项目(闽发改高技2008[794]) |
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| 摘 要： | 采用水解法制得纯相掺氟硅酸亚铁锂正极材料.通过XRD衍射、充放电实验、交流阻抗谱、红外光谱、热重等现代手段,研究了所制备的样品的电化学性能.研究表明,通过400、600℃两步烧结可制得具有单斜结构(空间群P21/n)的Li2.05FeSiO4F0.02/C.制备的扣式电池在55℃下,分别以0.3C、1C、2C倍率电流连续充放电30循环时,第1循环的容量分别为116.8、106.5、99.2 mAh.g-1.掺氟改善了硅酸亚铁锂的电化学性能.
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| 关 键 词： | 锂离子电池 水解法 正极材料 掺氟硅酸亚铁锂 |
Preparation of the cathode material for the fluoride doped lithium iron silicates composites by using a hydrolysis method |
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| CHEN Mei-rong,SHI Ji-cheng,ZHAN Ya-xian,CHANG Mei-juan,LI Xiu-hua,TONG Qing-song. Preparation of the cathode material for the fluoride doped lithium iron silicates composites by using a hydrolysis method[J]. Journal of Jilin Institute of Chemical Technology, 2011, 28(5): 10-14 |
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| Authors: | CHEN Mei-rong SHI Ji-cheng ZHAN Ya-xian CHANG Mei-juan LI Xiu-hua TONG Qing-song |
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| Affiliation: | CHEN Mei-rong,SHI Ji-cheng,ZHAN Ya-xian,CHANG Mei-juan,LI Xiu-hua,TONG Qing-song(College of Chemistry and Materials Science,Fujian Normal University,Fuzhou 350007,China) |
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| Abstract: | The fluoride doped lithium iron silicates composites with the pure monoclinic structure（Space group：P21/n） were prepared using a hydrolysis method.The as-prepared composites were characterized by using XRD patterns,charge-discharge cycling,electrochemical impedance spectroscopy,infrared spectroscopy and thermogravimetry.Experimental results show the Li2.05FeSiO4F0.02/C prepared using a hydrolysis method sintered at 400℃ and 600℃,respectively.The button cell prepared with the cathode material of Li2.05FeSiO4F0.02/C exhibits a capacity of 116.8 mAh·g-1（0.3C rate）,106.5 mAh·g-1（1C rate） and 99.2 mAh·g-1（2 C rate） at 55℃,indicating the fluoride agent improved the electrochemical performance of the lithium iron silicates composites. |
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| Keywords: | lithium ions battery hydrolysis method cathode materials fluoride doped lithium iron silicates |
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