| LiFePO4/C正极材料的微波合成及性能研究 |
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| 引用本文： | 徐徽,刘卫平,苏元智,杨喜云.LiFePO4/C正极材料的微波合成及性能研究[J].材料导报,2011,25(12). |
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| 作者姓名： | 徐徽 刘卫平 苏元智 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 |
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| 摘 要： | 采用机械球磨结合微波辐射工艺合成C包覆锂离子电池正极材料LiFePO4/C.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不同C源和掺C量对样品物相结构、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LiFePO4/C正极材料;以乙炔黑作为C源,掺杂8%(质量分数)所合成的样品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148.44mAh/g,10次循环后仍有144.74mAh/g,容量保持率为97.51%.
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| 关 键 词： | LiFePO4/C 正极材料 C包覆 微波合成 锂离子电池 电化学性能 |
Study on Microwave Synthesis and Properties of LiFePO4/C Cathode Materials |
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| XU Hui,LIU Weiping,SU Yuanzhi,YANG Xiyun.Study on Microwave Synthesis and Properties of LiFePO4/C Cathode Materials[J].Materials Review,2011,25(12). |
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| Authors: | XU Hui LIU Weiping SU Yuanzhi YANG Xiyun |
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| Affiliation: | XU Hui,LIU Weiping,SU Yuanzhi,YANG Xiyun(School of Metallurgical Science and Engineering,Central South University,Changsha 410083) |
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| Abstract: | The LiFePO4/C cathode materials for lithium-ion battery were synthesized by means of mechanical ball-milling and microwave processing.The effects of different C-suppliers and the amounts of C-coating on the crystalline structure,morphology of particles and electrochemical properties of the resultant products were investigated by X-ray diffraction,scanning electro-microscopy and constant current charge-discharge test.The experimental results reveal that LiFePO4/C cathode material can be synthesized quickly b... |
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| Keywords: | LiFePO4/C cathode material C-coating microwave sythesis lithium-ion batteries electrochemical performance |
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