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石墨烯包覆磷酸铁锂正极材料的合成及性能研究 被引量：1

Synthesis and characterization of LiFePO_4 cathode materials coated by graphene
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摘要 通过溶胶凝胶法合成了石墨烯包覆的橄榄石型LiFePO4/石墨烯正极复合材料。实验采用在磷酸铁锂前驱体制备过程中加入石墨烯,经高温煅烧后实现了石墨烯与磷酸铁锂的均匀包覆。研究了石墨烯对正极材料的结构和电化学性能的影响。研究结果表明,LiFePO4/石墨烯复合材料的颗粒尺寸比纯LiFePO4明显减小,石墨烯包覆后的LiFePO4材料的电荷转移电阻显著降低,在0.1 C电流密度下的首次充放电比容量达到143.6 mAh/g,循环性能也得到较大提高。 Olivine-type LiFePO4 /graphene composite materials were synthesized by sol-gel method. Graphene was added into the preparation process of LiFePO4 precursor, then the mixture was sintered in high temperature to achieve LiFePO4 coated with graphene evenly. The structure and electrochemical properties of graphene-coating LiFePO4 were investigated. The results indicated that LiFePO4 /graphene particle sizes decreased dramatically by sol-gel method. The charge resistance of LiFePO4 was significantly reduced by coating with high conductive graphene, whereas the initial discharge capacity and cycling performance were greatly increased.
作者 汪贝贝 雍自俊 田哲 周竹发
机构地区 苏州大学材料与化学化工学部
出处 《江苏陶瓷》 CAS 2013年第6期14-16,19,共4页 Jiangsu Ceramics
关键词 溶胶凝胶法 LIFEPO4 石墨烯包覆 sol-gel method LiFePO_4 graphene-coating
分类号 TM912 [电气工程—电力电子与电力传动]
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参考文献17

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二级参考文献30

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江苏陶瓷
2013年 第6期

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