| Ni-Si合金材料与Ni-Si/C复合阳极材料的结构和电化学性能研究 |
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| 引用本文： | 张勇福,吴润,黄峰,甘章华,谢锐.Ni-Si合金材料与Ni-Si/C复合阳极材料的结构和电化学性能研究[J].武汉冶金科技大学学报,2010(3):277-281. |
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| 作者姓名： | 张勇福 吴润 黄峰 甘章华 谢锐 |
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| 作者单位： | 武汉科技大学材料与冶金学院,湖北武汉430081 |
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| 基金项目： | 湖北省教育厅中青年人才资助项目（Q20101112）; 武汉科技大学绿色制造与节能减排科技中心开发基金资助项目（B0901） |
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| 摘 要： | 采用大气熔炼-机械球磨二步法制备一系列Ni-Si合金材料和Ni-Si/C复合材料,并运用X射线衍射XRD、场发射扫描电子显微镜FE-SEM和恒电流充放电等测试方法对Ni-Si合金材料和Ni-Si/C复合阳极材料的结构和电化学性能进行了研究。结果表明,Ni-Si合金材料的放电比容量随着Si含量的增加呈上升趋势,但第1周材料充放电的库仑效率下降;采用炭包覆法制备的Ni-Si/C复合阳极材料与Ni-Si合金材料相比,其电化学循环性能大幅度提升,Ni-Si/C复合阳极材料第10周放电比容量保持分数是Ni-Si合金材料的6倍左右,这是因为机械球磨使炭粉均匀地分布在合金颗粒之间,提高了复合阳极材料的导电性。
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| 关 键 词： | 锂离子电池 Ni-Si/C复合材料 大气熔炼 |
Preparation and electrochemical properties of Ni-Si and its C-doped anode materials |
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| Authors: | Zhang Yongfu Wu Run Huang Feng Gan Zhanghua Xie Rui |
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| Affiliation: | (College of Materials Science and Metallurgical Engineering,Wuhan University of Science and Technology,Wuhan 430081,China) |
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| Abstract: | Ni-Si anode materials were made by ball milling in acetone after pure Si and Ni had been melted.The morphology,structure and electrochemical properties of the anode materials were measured by modern analysis devices.Discharge capacity of the anode materials increased with increasing Si content,while Coulomb efficiency decreased in the first cycle.The anode material of w（Si）=75% Si was milled with carbon powder which was distributed in the alloy particle materials.The carbon doping material showed better circulation performance and the capacity-hold-retention after ten cycles was seven times that of the anode materials without doping. |
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| Keywords: | li-ion battery Ni-Si anode material air melting |
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