Synthesis, Characterization and Electrochemical performance of Li2Mn0.7Fe0.3SiO4 Prepared from Solid-state Reaction

摘要：

Li2MSiO4(M=Mn, Co, Ni) is a potential high capacity cathode material because of its outstanding properties that exchange of two electrons per transition metal atom is possible and the theoretical capacity of Li2MSiO4 can reach as high as 330 mAhg-1. In this family, the cathode performance of Li2MnSiO4 synthesized by solution route has been published recently. However, it seems that the cycle life of Li2MnSiO4 fell short of our expectation. In this work, the Li3Mn0.7Fe0.3SiO4 cathode material was synthesized by traditional solid-state reaction method. The prepared powder was consisted of majority of Li2Mn0.7Fe0.3SiO4 and minor impurities which were examined by XRD. FESEM morphology showed that the products of Li2Mn0.7Fe0.3SiO4 and Li2MnSiO4 have similar particle size (about 50-300 nm). The electrochemical performance of Li2Mn0.7Fe0.3SiO4, especially for reversible capacity and cycle life, exhibited better than those of Li2MnSiO4.

关键词： Lithium manganese iron silicate Cathode material Solid-state reaction Electrochemical performance

作者: Wengang Liu Yunhua Xu Rong Yang

作者单位: Institute of Wear Resistance Material, Xian University of Architecture and Technology, Xian 710055 Schoolc Science,Xian University of Technology,Xian 710048,China

会议类型: 国际会议

会议名称: 10th International Symposium on Eco-Materials Processing and Design(第10届国际生态材料加工与设计研讨会)

会议地点: 西安

会议语种:英文

页码: 17-20

在线出版日期: 2009-01-13（万方平台首次上网日期，不代表论文的发表时间）