高等学校化学学报 ›› 2011, Vol. 32 ›› Issue (10): 2367.

• 研究论文 • 上一篇    下一篇

B对Sn-Co合金结构及电化学性能的影响

沈丁1, 杨绍斌2, 吴晓光2, 米晗2   

  1. 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
  • 收稿日期:2011-01-04 修回日期:2011-06-05 出版日期:2011-10-10 发布日期:2011-09-11
  • 通讯作者: 杨绍斌 E-mail:yangshaobin@yahoo.com.cn
  • 基金资助:

    高等学校博士学科点专项科研基金(批准号: 20092121110004)资助.

Influence of B on the Structures and Electrochemical Properties of Sn-Co Alloy

SHEN Ding1, YANG Shao-Bin2*, WU Xiao-Guang2, MI Han2   

  1. 1. College of Resource and Environment Engineering,
    2. College of Materials Science and Engineering, Liaoning Technical University, Fuxin 123000, China
  • Received:2011-01-04 Revised:2011-06-05 Online:2011-10-10 Published:2011-09-11
  • Contact: YANG Shao-Bin E-mail:yangshaobin@yahoo.com.cn
  • Supported by:

    高等学校博士学科点专项科研基金(批准号: 20092121110004)资助.

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.

关键词: 锂离子电池, Sn-Co合金,

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.

Key words: Lithium-ion battery, Sn-Co alloy, Boron

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