【摘要】 分别介绍了可以作为锂离子二次电池正极材料的几种磷酸根聚阴离子过渡金属锂盐的研究近况,着重分析了磷酸亚铁锂和磷酸钒锂的现状。LiFePO4为橄榄石结构,具有较高开路电压、高理论容量、电压平台稳定、环境友好等优点,但电子导电率和离子传导率低制约了它的应用,介绍了解决磷酸亚铁锂两低问题的方法;磷酸钒锂为NASCION结构,理论容量比磷酸亚铁锂高,具有一定的研究价值,介绍了磷酸钒锂的制备方法,认为磷酸钒锂最主要的问题是稳定性不高。指出当前锂离子二次电池正极材料应该加快磷酸亚铁锂的工业化进程,加速磷酸钒锂的研究步伐,同时不放松其他更新正极材料的开发。更多还原

【Abstract】 The research status of several poly-anions phosphates as cathode materials are introduced,present status of LiFePO4 and Li3V2(PO4)3 are analyzed emphatically. Olivine-LiFePO4 has many advantages such as high-voltage,high theoretical capacity,stable voltage platform and no pollution.But the low electronic conductivity and ion conductivity inhibits its popularization,settlements fore these two problems are proposed; NASCION-Li3V2(PO4)3’s theoretical capacity is higher than LiFePO4’s,which makes it significant to be studied.In this article preparation me-thods of Li3V2(PO4)3 are advanced,it is proposed that Li3V2(PO4)3’s stability need to be improved.Now it should accelerate the industrialization progress of LiFePO4,speed up the research pace of Li3V2(PO4)3,and develop other new positive materials simultaneously.更多还原