| 锂离子电池Sn-Co/C负极材料的制备与性能研究 |
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| 引用本文： | 成志博. 锂离子电池Sn-Co/C负极材料的制备与性能研究[J]. 华南师范大学学报（自然科学版）, 2013, 45(5). |
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| 作者姓名： | 成志博 |
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| 作者单位： | 1.华南师范大学 |
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| 摘 要： | 采用高温碳化裂解技术，并通过高能球磨处理，制备得到改性的高容量Sn-Co/C负极复合材料.采用X射线衍射技术测试材料的物相结构、利用扫描电镜测试材料的表面形貌.同时利用恒电流充放电和交流阻抗技术测试材料的电化学性能.结果表明，高能球磨处理后，Sn-Co/C出现非晶、纳米晶的混合组织.电极的首次放电和充电容量分别为1098.9 mAhg-1和771.3mAhg-1，经40次循环后容量仍保持在425.1 mAhg-1；改性Sn-Co/C具有更高的锂离子扩散系数，这有利于提高合金材料的充放电性能.
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| 关 键 词： | 负极材料 |
| 收稿时间： | 2013-04-03 |
| 修稿时间： | 2013-04-29 |
PREPARATION AND ELECTROCHEMICAL PERFORMANCE OF SN-CO/C ALLOY ANODE MATERIAL FOR LITHIUM-ION BATTERY |
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| Zhi-Bo CHENG. PREPARATION AND ELECTROCHEMICAL PERFORMANCE OF SN-CO/C ALLOY ANODE MATERIAL FOR LITHIUM-ION BATTERY[J]. Journal of South China Normal University (Natural Science Edition), 2013, 45(5). |
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| Authors: | Zhi-Bo CHENG |
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| Abstract: | Sn-Co/C composite material was prepared by carbonization reduction process firstly, then the composite was treated by high energy ball milling.The structural, morphological features,and electrochemical properties of the Sn-Co/C composite were characterized by powder X-ray diffraction,SEM,AC impedance analysis. The experimental results revealed that after ball milling,the morphological of the Sn-Co/C composite became amorphous. In first cycle,the Sn-Co/C composite electrode showed a large discharge capacity of 1098.9 mAhg-1, and a large charge capacity of 771.3mAhg-1,and showed high capacity 425.1 mAhg-1 after 40 cycles.The modified Sn-Co/C showed higher lithium-ion diffusion coefficient,which will help improve the electrochemical properties of the alloy material. |
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| Keywords: | anode material |
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