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GICs技术改性包覆天然鳞片石墨的研究 被引量:3
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作者 张静 郑永平 +2 位作者 邹麟 刘旋 沈万慈 《电池》 CAS CSCD 北大核心 2006年第4期257-259,共3页
利用石墨层间化合物(GICs)技术对天然鳞片石墨进行结构改性。通过XRD和SEM分析,证实了GICs技术改性的包覆鳞片石墨能在充放电过程中更好地维持着包覆后的“核-壳”结构,提高了其循环稳定性。在1C倍率下,50次循环后,球形鳞片石墨和GICs... 利用石墨层间化合物(GICs)技术对天然鳞片石墨进行结构改性。通过XRD和SEM分析,证实了GICs技术改性的包覆鳞片石墨能在充放电过程中更好地维持着包覆后的“核-壳”结构,提高了其循环稳定性。在1C倍率下,50次循环后,球形鳞片石墨和GICs改性鳞片石墨的容量保持率分别为84.6%和99.4%。 展开更多
关键词 锂离子电池 天然鳞片石墨 包覆 石墨层间化合物(gics) 负极材料
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Structure model and synthesis of NdCl_3-FeCl_3-graphite intercalation compounds
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作者 侯仰龙 韦永德 石建新 《Science China Chemistry》 SCIE EI CAS 2000年第5期547-554,共8页
The distribution of the elements and microstructure of NdCI3-FeCI3-graphite intercalation compounds (GICs) were shown by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results show th... The distribution of the elements and microstructure of NdCI3-FeCI3-graphite intercalation compounds (GICs) were shown by scanning electron microscope (SEM) and energy dispersive spectroscopy (EDS). The results show that Nd element intercalates into graphite, forming NdCI3-FeCI3-GICs, and the distribution of Nd and Fe is nearly even. On the basis of the data, a structure model for RECI3-GICs was founded, and the characteristic layer distance and the index of interval energy were calculated. The calculated results agree with experimental ones, and the relative errors are ±2%. Thus it can be seen that the (111) face is optimal direction for intercalation reaction of TbCl3-LuCl3, and the (001) face is that for LaCl3-GdCl3, because of the lowest interval energy. 展开更多
关键词 NdCl_3 graphite intercalation compounds (gics) scanning electron microscope (SEM) structure model.
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