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粘结剂对锂离子电池Si/C复合材料性能的影响 被引量：7

Effect of binders on performances of Si/C composites for Li-ion batteries
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摘要 以纳米硅粉(Si)、鳞片石墨(FG)和柠檬酸为原料,通过液相固化高温热解法制备硅碳(Si/C)复合材料,采用XRD和SEM表征复合材料的结构和形貌;采用不同的黏结剂聚四氟乙烯(PVDF)和褐藻酸盐(SA)分别对材料的电化学性能进行表征。结果表明:采用PVDF和SA作为粘结剂时,材料首次可逆比容量分别为528.7和538.5mA.h/g,首次库仑效率分别为69.57%和63.38%,但是采用SA作为粘结剂时材料呈现出良好的循环性能,20次循环后容量保持在90%以上。 The Si/C composite was prepared by pyrolyzing the citric acid mixed with nano-silicon and flake graphite powders. X-ray diffractometry （XRD） and scanning electron microscopy （SEM） were used to characterize the structure and morphology of the composite. The electrochemical performance of the composites was investigated by using two different binders polytetrafluoroethene （PVDF） and sodium alginate （SA）, respectively. The results shows the initial capacities of the composite using different binders are 528.7 and 538.5 mA.h/g, respectively, and the initial efficiencies are 69.57% and 63.38%, respectively. However, the composite exhibits a better cycling performance when using the SA binder, and the capacity retention is more than 90% after 20 cycles.
作者 苏明如 王志兴 郭华军 李新海 黄思林 甘雷
机构地区 中南大学冶金科学与工程学院
出处 《中国有色金属学报》 EI CAS CSCD 北大核心 2013年第4期1059-1064,共6页 The Chinese Journal of Nonferrous Metals
基金 湖南省科技重大专项基金资助项目(2009FJ1002)
关键词 锂离子电池 负极材料 SI C复合材料 电化学性能 Li-ion batteries anode Si/C composites electrochemical performance
分类号 TM912.9 [电气工程—电力电子与电力传动]
  • 相关文献

参考文献19

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二级参考文献24

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共引文献24

同被引文献63

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引证文献7

二级引证文献13

中国有色金属学报
2013年 第4期

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