葡萄糖添加量对LiFePO_4/C性能影响的研究  

Effects of glucose addition on properties of LiFePO_4/C materials

作　　者：彭能[1] 黄奇书[1] 雷一锋[1] 张四奇[1] 郑爱勤[1] 

机构地区：[1]广东省工业技术研究院(广州有色金属研究院),广东广州510650

出　　处：《材料研究与应用》2011年第4期263-266,共4页Materials Research and Application

摘　　要：以葡萄糖作为碳源,采用固-液结合法合成了LiFePO4/C材料,用X射线衍射仪、扫描电镜和电化学测试仪对其结构和电化学性能进行了研究.结果表明,加入葡萄糖可得到粒径细小、均匀的LiFe-PO4/C材料;当添加葡萄糖质量分数为9%时,合成的LiFePO4/C材料被碳膜均匀包覆,具有良好的物理形貌和电化学性能,0.2C恒流放电比容量为143.6mAh/g,循环30周后放电比容量保持率为94.8%.In this paper, microstructure and electrochemical properties of LiFePO4/C materials prepared by solid-liquid technique with glucose as the carbon source were studied by X-ray diffraction, scanning electron microscope and electrochemical testing. The results show that small and even LiFePO4/C materials are obtained by adding glucose. When mass fraction of glucose is 9~, LiFePO4/C materials evenly coated by carbon film exhibit a good physical appearance and electrochemical properties. The electrochemical tes ting indicates that maximum discharge capacity of LiFePO4/C materials is 143.6mAh .g^-1 under 0.2C con stant current, and discharge capacity conservation rate is 94.8% after 30 cycles.

关 键 词：LiFePO4/C材料 放电比容量 碳包覆 

分 类 号：TQ131.11[化学工程—无机化工]