中文摘要：

正硅酸盐正极材料因其高理论容量、高安全性能、低成本及环境友好等优点,近几年引起研究者的广泛关注.本文综述了国际上正硅酸盐材料最新研究进展.结合本课题组在该领域的研究,着重从此类材料的合成方法、结构研究、电化学性能及反应机理等方面进行阐述.综合分析正硅酸盐材料各种合成方法的优缺点、结构研究存在的争议以及性能和机理研究上的难点,分析并展望亟待解决的问题和未来可能的发展方向.

英文摘要：

Rechargeable Li-ion batteries fulfilling high energy density,high safety,environmental friendliness,and low cost are demanded urgently for energy storage systems.Due to the structure stability arising from the strong Si-O covalent bond,environmental benignancy and low cost from the characteristics of Fe,Mn,Si elementals,orthosilicates（Li2MSiO4） show promising prospect to meet the demand of high energy density for its two available Li＋ per formula unit.Motivated by these significant advantages,Li2MSiO4 have been intensively investigated in the past few years.In the present work,we gave a review on the progresses of orthosilicate research including the materials synthesis,structure,electrochemical performance and mechanism study.In addition,some aspects of future research,as well as the problems need to be focused are suggested.