| α-Fe_2O_3/Fe_3O_4复合负极材料的制备与电化学性能研究 |
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| 引用本文： | 石磊,刘洪波,何月德,洪泉,杨丽.α-Fe_2O_3/Fe_3O_4复合负极材料的制备与电化学性能研究[J].功能材料,2010,41(1). |
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| 作者姓名： | 石磊 刘洪波 何月德 洪泉 杨丽 |
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| 作者单位： | 湖南大学,材料科学与工程学院,湖南,长沙,410082 |
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| 基金项目： | 国家自然科学基金资助项目(50872032) |
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| 摘 要： | 通过固相反应法合成出α-Fe2O3/Fe3O4复合产物,利用XRD、Raman、SEM等技术和恒电流充放电方法,探讨了恒温反应时间对材料微观结构、形貌以及电化学性能的影响。研究表明,恒温反应时间对复合产物中各组分的相对含量、形貌与电化学性能影响较大;除首次循环外,复合负极材料在随后充放电过程中库伦效率可达96%以上,循环性能与倍率性能明显优于单相α-Fe2O3负极材料与Fe3O4负极材料。
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| 关 键 词： | 锂离子电池 复合负极材料 α-Fe2O3/Fe3O4 |
The synthesis and electrochemical performance of α-Fe_2O_3/ Fe_3O_4 composite anode electrodes |
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| SHI Lei,LIU Hong-bo,HE Yue-de,HONG Quan,YANG Li.The synthesis and electrochemical performance of α-Fe_2O_3/ Fe_3O_4 composite anode electrodes[J].Journal of Functional Materials,2010,41(1). |
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| Authors: | SHI Lei LIU Hong-bo HE Yue-de HONG Quan YANG Li |
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| Affiliation: | College of Materials Science and Engineering;Hunan University;Changsha 410082;China |
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| Abstract: | α-Fe_2O_3/Fe_3O_4 composite have been synthesized through a solid reaction route.The correlation between reaction time and microstructure,morphology,electrochemical properties of various composites were investigated via XRD,Raman spectrum,SEM and galvanostaic measurements.The results reveal that reaction time has a significant effect on the concentration and electrochemical performances of the α-Fe_2O_3 and Fe_3O_4 composite.The excellent cycling properties were measured and their coulombic efficiency can reach 96% except the 1st cycle.Furthermore,better cycling and rate properties of the composite were obtained compared with those of the single α-Fe_2O_3 and the single Fe_3O_4 anode materials. |
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| Keywords: | lithium ion battery composite anode electrodes |
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