提高锂离子电池正极材料LiFePO4电导率的方法

橄榄石型结构的LIFePO<,4>作为一种新型的锂离子电池正极材料,具有材料来源广泛、价格便宜、理论比容量高(约170 mAh/g)、热稳定性好、无吸湿性、对环境友好等优点,近年来引起人们的广泛关注,可望成为新一代首选替代LiCoO<,2>的锂离子二次电池正极材料.分析了锂离子电池正极材料橄榄石型LiFePO<,4>的...

Study on the conductivity improvement of positive electrode material LiFePO4 for Li-ion battery

As a new type positive electrode material for lithium ion battery,olivine lithium iron phosphate has advantages of abundance source,low cost,high specific theory capacity（about 170 mA·h/g）,good thermal stability,little hygroscopicity and environmental friendly.It can be expected as the first candidate of positive electrode material instead of lithium cobaltate（LiCoO2） for lithium ion battery.The structural characteristic and the reasons for the loss of initial discharge capacity of olivine-type positive electrode material of LiFePO4 for Li-ion battery are analyzed.The progresses in modified research of electrochemical properties of LiFePO4 at home and abroad in recent years are reviewed.Especially the effects of the methods of optimizing synthetic technology and adding the conductive materials on the LiFePO4 are introduced,and the developing trend of LiFePO4 is also prospected.