A facile synthesis of Fe3O4/C composite with high cycle stability as anode material for lithium-ion batteries
A facile synthesis of Fe3O4/C composite with high cycle stability as anode material for lithium-ion batteries
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DOI：
10.1016/j.jpowsour.2013.03.073
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发表时间：
2013-10
影响因子：
9.2
通讯作者：
Peng Wang;M. Gao;H. Pan;J. Zhang;Chu Liang;Junhua Wang;P. Zhou;Yongfeng Liu
中科院分区：
文献类型：
--
作者：
Peng Wang;M. Gao;H. Pan;J. Zhang;Chu Liang;Junhua Wang;P. Zhou;Yongfeng Liu
将纳米Fe 2 O3粉末与乙炔黑（AB）按不同比例球磨，然后在600 °C下碳热还原6 h，制备Fe 3 O 4/C复合材料。研究了Fe_2O_3/AB混合物在碳热还原过程中的结构演变以及Fe_3O_4/C复合材料作为锂离子电池负极材料的电化学性能。结果表明，在还原过程中，Fe 2 O3被完全还原为Fe 3 O 4。Fe 3 O 4颗粒继承了Fe 2 O3的纳米尺寸特征，在复合材料中分散良好。复合材料与60和70重量%，AB加法具有接近的能力约。100次循环后，430 mAh g− 1，保持率分别为85%和95%。由Fe_2O_3/AB混合物转化的Fe_3O_4/C复合材料的电化学性能优于混合物。Fe 3 O 4/C复合材料良好的电化学性能主要归因于Fe 3 O 4纳米粒子在碳基体中的均匀分布和Fe 3 O 4较高的电子电导率。该合成方法易于大规模生产性能优良的锂离子电池上级负极材料。
Fe3O4/C composites are synthesized by ball milling nano-sized Fe2O3powder with acetylene black (AB) in different ratios followed by a carbothermal reduction at 600 °C for 6 h. Structural evolution of the Fe2O3/AB mixtures during the carbothermal reduction and the electrochemical properties of the Fe3O4/C composites as anode materials for lithium-ion batteries are investigated. The results show that Fe2O3has been fully reduced to Fe3O4during the reduction. The Fe3O4particles inherit the nano-size feature of Fe2O3and are well dispersed in the composites. The composites with 60 and 70 wt.%AB additions possess a close capacity of ca. 430 mAh g−1after 100 cycles, showing retentions of 85% and 95%, respectively. The Fe3O4/C composites converted from Fe2O3/AB mixtures show better electrochemical performance than the mixtures. The favorable electrochemical performance of the Fe3O4/C composites is mainly attributed to the homogeneous distribution of the Fe3O4nanoparticles in the carbon matrix and the comparatively high electronic conductivity of Fe3O4. The synthesis method is suggested to be facile in large-scale production of superior anode materials for lithium-ion batteries.