常州大学学报（自然科学版）2013，Vol.25Issue(1)：76-81,6.DOI:10.3969/j.issn.2095-0411.2013.01.016
LiFePO4/石墨烯复合材料的电化学性能比较
Comparative Study of Electrochemical Performance of LiFePO4/Graphene Composites
摘要
Abstract
Using hydrothermal-synthesized graphene (H-Gr) and commercial graphene (C-Gr) as the carries, respectively, four LiFePO4/Graphene composites were prepared by a solid-state method with sol - gel -synthesized LiFePO4 (S-LFP) and commercial LiFePO4(C- LFP) as the active ingredient, respectively. The structures and electrochemical performances of those composites were investigated and compared by X-ray powder diffraction (XRD), scanning electron microscopy (SEM), and electrochemical measurements. The experimental results indicated that the C - LFP/H - Gr composite exhibited a highest reversible discharge-capacity of 155.0mA·h·g-1 at 0. 1C rate, followed by C-LFP/C -Gr (144. 6mA·h·g-1) and S-LFP/H-Gr (131. 5mA·h·g-1), and S-LFP/C-Gr showed the lowest capacity of 119.6mA·h·g-1 among four samples. The improved electrochemical capacity of the C -LFP/H -Gr composite might due to the smaller particle size and well-crystallized structure of commercial LiFePO4. On the other hand, LiFePO4 is well-coated by small nanosheets of hydrothermal-synthesized graphene, which not only enhanced the conductivity of composites, but also improved the utilization of the active ingredient.关键词
锂离子电池/LiFePO4/石墨烯/固相法/电化学容量Key words
lithium-ion batteries/ lithium iron phosphate/ graphene/ solid-state method/ electrochemical capacity分类
化学化工引用本文复制引用
周慧,王进,许娟,陈智栋,曹剑瑜..LiFePO4/石墨烯复合材料的电化学性能比较[J].常州大学学报（自然科学版）,2013,25(1):76-81,6.基金项目
江苏省科技支撑计划基金(BE201113) （BE201113）
江苏省企业博士集聚计划基金(2011Z0062) （2011Z0062）
