| Li_(1-x)Cr_xFePO_4的微波合成研究 |
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| 引用本文： | 徐徽,刘卫平,苏元智,石西昌,杨喜云.Li_(1-x)Cr_xFePO_4的微波合成研究[J].材料导报,2011,25(14). |
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| 作者姓名： | 徐徽 刘卫平 苏元智 石西昌 杨喜云 |
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| 作者单位： | 中南大学冶金科学与工程学院,长沙,410083 |
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| 基金项目： | 国家科技支撑计划“十一五”重大项目(2008BAB35B04) |
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| 摘 要： | 采用机械球磨结合微波法合成了Cr3+掺杂锂离子电池正极材料Li1-xCrxFePO4。通过X射线衍射(XRD)、扫描电镜(SEM)和恒电流充放电测试研究了Cr3+掺杂方式和掺杂量对样品的物相结构、形貌和电化学性能的影响。实验结果表明,微波法可以快速合成Li1-xCrxFePO4正极材料;以共沉淀掺杂方式合成的样品Li0.99Cr0.01-FePO4具有最好的电化学性能,在室温下以20mA/g进行充放电测试,其首次放电容量为153.59mAh/g,10次循环之后还有149.29mAh/g,容量保持率为97.20%。
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| 关 键 词： | LiFePO4 正极材料 Cr3 掺杂 微波 锂离子电池 |
Study on Synthesis of Li_(1-x)Cr_xFePO_4 by Microwave Processing |
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| XU Hui,LIU Weiping,SU Yuanzhi,SHI Xichang,YANG Xiyun.Study on Synthesis of Li_(1-x)Cr_xFePO_4 by Microwave Processing[J].Materials Review,2011,25(14). |
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| Authors: | XU Hui LIU Weiping SU Yuanzhi SHI Xichang YANG Xiyun |
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| Affiliation: | XU Hui,LIU Weiping,SU Yuanzhi,SHI Xichang,YANG Xiyun(School of Metallurgical Science and Engineering,Central South University,Changsha 410083) |
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| Abstract: | The Li1-xCrxFePO4 cathode materials for lithium-ion battery were synthesized by means of mechanical ball-milling and microwave processing.The effects of different ways of Cr3+-doping and the amounts of doped-Cr3+ on the crystalline structure,morphology of particles and electrochemical properties of the resultant products were investigated by XRD,SEM and constant current charge-discharge test.The experimental results reveal that a Li1-x-CrxFePO4 cathode material can be synthesized quickly by microwave proces... |
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| Keywords: | LiFePO4 cathode material Cr3 -doping microwave lithium-ion batteries |
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