石墨烯改性LiFePO_4正极材料的研究进展

Research progress on modification of LiFePO_4 by graphene

以石墨烯改性LiFePO4正极材料为主线,从磷酸铁锂/石墨烯复合材料的结构与电化学机制、影响电化学性能的因素和制备方法三个方面综述了石墨烯改性LiFePO4的发展现状和最新研究进展,并对当下存在的问题进行了分析和探讨。利用石墨烯改性LiFePO4可以极大地提高LiFePO4电导率,相比其它传统碳材料,石墨烯由于其独特的结构和优良的电化学性能,将是锂离子电池正极改性材料中最具发展前景的碳活性材料,为LiFePO4在锂动力电池中的应用起到了积极的促进作用。

In this paper, the present situation and the latest research progress on the modification of LiFePO4 by graphene were reviewed, involving the structure and the electrochemical mechanisms, the factors that influenced the electrochemical properties and the preparation methods. The current problems of this field were analyzed and discussed. The modification of LiFePO4 by graphene could greatly improve the conductivity of LiFePO4. Compared with other traditional carbon materials, graphene will be the most promising carbon active material for the modification of cathode materials in lithium-ion battery because of its unique structure and excellent electrochemical property. The modification of LiFePO4 by graphene will positively promote the application of LiFePO4 in the lithium ion power battery.