| 分散剂PVA对水热反应制备LiFePO4性能的影响 |
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| 引用本文： | 李会林,詹晖,周运鸿. 分散剂PVA对水热反应制备LiFePO4性能的影响[J]. 电化学, 2006, 12(3): 262-265 |
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| 作者姓名： | 李会林 詹晖 周运鸿 |
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| 作者单位： | 武汉大学化学与分子科学学院,湖北,武汉,430072;武汉大学化学与分子科学学院,湖北,武汉,430072;武汉大学化学与分子科学学院,湖北,武汉,430072 |
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| 摘 要： | 应用改进的水热反应法制得粒径小且分布均匀的L iFePO4颗粒,煅烧时加葡萄糖形成包覆碳.XRD、SEM和充放电测试表明,该材料粒径约200 nm,颗粒的尺寸分布比较均匀,具有3.45 V的放电平台,放电容量最高达到140 mAh/g,循环到第40周容量仅衰减2.1%.详细讨论了如何有效调控L iFePO4的粒子尺寸以及包覆碳对其电化学性能的影响.
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| 关 键 词： | 锂离子电池 正极材料 LiFePO4 粒径 包覆碳 电化学性能 |
| 文章编号： | 1006-3471（2006）03-0262-004 |
| 收稿时间： | 2005-12-30 |
| 修稿时间： | 2006-01-30 |
The Influence of PVA as Disperser on LiFePO4 Synthesized by Hydrothermal Reaction |
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| LI Hui-lin,ZHAN Hui,ZHOU Yu-hong. The Influence of PVA as Disperser on LiFePO4 Synthesized by Hydrothermal Reaction[J]. Electrochemistry, 2006, 12(3): 262-265 |
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| Authors: | LI Hui-lin ZHAN Hui ZHOU Yu-hong |
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| Affiliation: | College of Chemistry and Molecular Sciences, Wuhan University, Wuhan 430072, Hubei, China |
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| Abstract: | LiFePO_(4) was synthesized by means of hydrothermal reaction,in which PVA acts as disperser and glucose as carbon source.The samples were characterized by X-ray diffraction,scanning electron microscopy and electrochemical measurement.SEM results show that the sample is homogeneously composed of grains with a particle size of ca.200nm.In the charge/discharge test,the products exhibited a 3.45V discharge voltage plateau and a maximum specific capacity of 140mAh/g.After 40 cycles,its capacity only declined by 2.1%.Besides these,the mechanism for the influence of the particle size and carbon coating on the electrochemical property of LiFePO_(4)material was discussed in detail. |
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| Keywords: | Lithium ion batteries Cathode material LiFePO_(4) Particle size Carbon coating Electrochemical performance |
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