多壁碳纳米管改性LiFePO_4正极材料进展  

Research progresses of MWCNTs modified LiFePO_4 cathode material for Li-ion batteries

作　　者：杨改[1] 蔡飞鹏[1] 蒋波[1] 胡素琴[1] 王波[1] 王建梅[1] 

机构地区：[1]山东省科学院能源研究所山东省生物质气化技术重点实验室,山东济南250014

出　　处：《功能材料》2012年第B08期1-5,共5页Journal of Functional Materials

基　　金：山东省科技发展计划资助项目(2011GGX10209)

摘　　要：磷酸铁锂(LiFePO4)由于具有低成本、无毒、热稳定性和循环性好的优势被认为是极有应用前景的锂离子电池正极材料,但材料本身的低电导率限制了其大规模应用。利用具有高电导率的碳纳米管对磷酸铁锂进行改性,可以显著提高正极材料的导电性。从不同的LiFePO4正极材料改性方法角度出发,综述了近几年MWCNTs改性LiFePO4正极材料国内外研究进展。多数研究者认为在LiFePO4正极材料中引入MWCNTs后,碳纳米管起到了连接正极材料颗粒的作用,所形成的高效电子传导三维网络显著改善了纯LiFePO4正极材料电导率差的缺陷。最后对MWCNTs改性LiFePO4正极材料研究中存在的问题进行了评述。lithium iron phosphates （LiFePO4） has been regarded as a promising cathode material for lithium-ion batteries due to its advantages of low cost, low toxicity, excellent thermal stability and good cycling property. The major issue with LiFePO4 was its lower electronic conductivity. Carbon nanotubes （CNTs） with excellent electrical conductivity can improve the conductivity of cathode material. In this paper, we reviewed the research progresses of CNTs modified LiFePO4 cathode material in recent years from a variety of modified methods. Most researchers believe that CNTs play a role in connecting the cathode material particles due to the introduction of MWCNTs. The efficient electronic conductive three-dimensional network can improve the poor conductivity of pure LiFePO4 cathode material significantly. Finally, we reviewed the problems that still exist in the MWCNTs modified LiFePO4 cathode material.

关 键 词：碳纳米管 磷酸铁锂 改性 研究进展 

分 类 号：TM912.9[电气工程—电力电子与电力传动]