| B对Sn-Co合金结构及电化学性能的影响 |
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| 引用本文： | 沈丁,杨绍斌,吴晓光,米晗. B对Sn-Co合金结构及电化学性能的影响[J]. 高等学校化学学报, 2011, 32(10): 2367-2370 |
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| 作者姓名： | 沈丁 杨绍斌 吴晓光 米晗 |
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| 作者单位： | 1. 辽宁工程技术大学资源与环境工程学院, 2. 材料科学与工程学院, 阜新 123000 |
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| 基金项目： | 高等学校博士学科点专项科研基金 |
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| 摘 要： | 采用固相法合成了Sn-Co/B复合材料, 考察了B对材料的结构和电化学性能的影响. XRD分析结果表明, Sn-Co合金由CoSn相组成, 添加B能使晶粒细化并且形成CoSn2. 恒流充放电测试表明, B的添加提高了Sn-Co合金的循环性能, 但使放电容量略有降低. 当B质量分数为4%时, Sn-Co/B复合物的首次放电容量为216 mA·h/g, 经过30次循环后容量保持率达82.9%, 表现出良好的结构稳定性.
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| 关 键 词： | 锂离子电池 Sn-Co合金 硼 |
| 收稿时间： | 2011-01-04 |
Influence of B on the Structures and Electrochemical Properties of Sn-Co Alloy |
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| SHEN Ding,YANG Shao-Bin,WU Xiao-Guang,MI Han. Influence of B on the Structures and Electrochemical Properties of Sn-Co Alloy[J]. Chemical Research In Chinese Universities, 2011, 32(10): 2367-2370 |
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| Authors: | SHEN Ding YANG Shao-Bin WU Xiao-Guang MI Han |
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| Affiliation: | 1. College of Resource and Environment Engineering, ;2. College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China |
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| Abstract: | The Sn-Co/B composites were synthesized using solid|state sintering and the influence of B element on the structures and electrochemical properties was analyzed. XRD results illustrate that Sn-Co alloy consists of CoSn phase. Adding B results in the refinement of grain size and the formation of CoSn2 phase. Constant-current cyclic testing show that adding B improves the cycle performance of Sn-Co alloy, but reduce its discharge capacity. The initial discharge capacity of Sn-Co/B(4%, mass fraction) is 216 mA•h/g and the capacity retention is 82.9% after 30 cycles, showing the composite has good structural stability. |
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| Keywords: | Lithium-ion battery Sn-Co alloy Boron |
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