| LiFePO_4的水热合成及电化学性能 |
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| 引用本文： | 康晓雪,田彦文,袁万颂.LiFePO_4的水热合成及电化学性能[J].东北大学学报(自然科学版),2009,30(9):1298-1301. |
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| 作者姓名： | 康晓雪 田彦文 袁万颂 |
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| 作者单位： | 东北大学材料与冶金学院,辽宁沈阳,110004 |
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| 摘 要： | 通过水热法合成了纯度较高、结晶良好且粒径均匀细小的LiFePO4粉体.采用XRD,SEM对材料的结构和形貌进行分析,并研究了水热合成温度和反应时间对材料电化学性能的影响.结果表明,提高反应温度和延长合成时间有利于提高材料的结晶度,但会增大材料粒径.200℃水热合成5 h样品电化学性能最佳,0.1C倍率首次放电比容量138.0 mAh.g-1,具备工业化实用性.在水热合成中加入抗坏血酸和葡萄糖可有效避免Fe2+的氧化并增强材料的导电性.
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| 关 键 词： | 锂离子电池 正极材料 LiFePO4 水热合成 电化学性能 |
Hydrothermal Synthesis and Electrochemical Properties of Lithium Iron Phosphate |
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| KANG Xiao-xue,TIAN Yan-wen,YUAN Wan-song.Hydrothermal Synthesis and Electrochemical Properties of Lithium Iron Phosphate[J].Journal of Northeastern University(Natural Science),2009,30(9):1298-1301. |
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| Authors: | KANG Xiao-xue TIAN Yan-wen YUAN Wan-song |
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| Institution: | KANG Xiao-xue,TIAN Yan-wen,YUAN Wan-song(School of Materials & Metallurgy,Northeastern University,Shenyang 110004,China.) |
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| Abstract: | High-purity and well-crystallized LiFePO4 powders with uniformly distributed fine particles were synthesized in a direct hydrothermal reaction.The microstructure and morphology of the samples were characterized via XRD,SEM and constant current charge-discharge cycle test so as to investigate the influences of hydrothermal temperature/time on the electrochemical properties of as-prepared LiFePO4 powder.The results showed that increasing hydrothermal temperature/time benefits the improvement of crystallinity ... |
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| Keywords: | LiFePO4 |
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