| FePO4为铁源时合成时间对LiFePO4/C性能的影响 |
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| 引用本文： | 夏继平,邓小川,王连亮.FePO4为铁源时合成时间对LiFePO4/C性能的影响[J].电池工业,2010,15(6):354-358. |
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| 作者姓名： | 夏继平 邓小川 王连亮 |
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| 作者单位： | 中国科学院青海盐湖研究所,青海西宁,810008;中国科学院研究生院,北京,100039;中国科学院青海盐湖研究所,青海西宁,810008 |
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| 基金项目： | 青海省重点科技攻关项目 |
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| 摘 要： | 以FeSO4.7H2O,H3PO4,H2O2和NH3.H2O为原料合成纳米化的FePO4.1.5H2O,并将Li2CO3、FePO4.1.5H2O和葡萄糖混合球磨,在800℃下通过碳热还原合成LiFePO4/C。采用X射线衍射(XRD)、扫描电镜(SEM)、循环伏安(CV)和恒电流充放电测试研究了相同温度下,不同合成时间LiFePO4/C样品的结构、形貌及电化学性能。结果表明:在800℃12 h下合成的样品具有最佳的电化学性能,在0.2C(1C=150mAh/g)倍率下放电,首次放电比容量为142.7mAh/g,经过20次充放电循环后容量基本保持不变。
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| 关 键 词： | 锂离子电池 LiFePO4 铁源FePO4·1.5H2O 碳热还原 |
Influence of synthesis time on the properties of LiFePO4/C composites with self-produced FePO4 as iron source |
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| XIA Ji-ping,DENG Xiao-chuan,WANG Lian-liang.Influence of synthesis time on the properties of LiFePO4/C composites with self-produced FePO4 as iron source[J].Chinese Battery Industry,2010,15(6):354-358. |
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| Authors: | XIA Ji-ping DENG Xiao-chuan WANG Lian-liang |
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| Affiliation: | 1.Qinghai institute of salt lakes,Chinese Academy of Science,Xining,Qinghai 810008,china;2.Graduate School of Chinese Academy of Sciences,Beijing 100039,china) |
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| Abstract: | Nano-FePO4·1.5H2O was synthesized with FeSO4·7H2O,H3PO4,H2O2 and NH3·H2O.LiFePO4/C cathode material was then prepared at 800 ℃ for different time by carbothermal reduction method using homogeneous mixture of Li2CO3,glucose and FePO4·1.5H2O.The structure,morphology and electrochemical properties of the samples were tested by X-ray diffraction（XRD）,scanning electronmicroscopy（SEM）,cyclic voltammetry（CV） and galvanostatic charge-discharge tests.The results showed that the LiFePO4/C composites synthesized at 800 ℃ for 12 h had optimal electrochemical properties and exhibited a initial discharge capacity of 142.7 mAh/g at 0.2 C（1 C=150 mAh/g）rate,there was almost no capacity fading after 20 cycles. |
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| Keywords: | Li-ion battery LiFePO4 FePO4·1 5H2O iron source carbothermal reduction |
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