关键词: LiFePO4, 锂矿, 制备成本, 电化学性能

Abstract: LiFePO4 was synthesized in aqueous solution with ferrous solution，phosphorus solution，and lithium solution of low trace impurity content prepared with lithium mineral.Cathode material LiFePO4  was acquired by calcining mixer of sugar and LiFePO4.By-products produced in preparing LiFePO4  and lithium solution were reused to prepare LiFePO4.The crystal phases，morphology，and electrochemical performance etc.were characterized by XRD，SEM，and constant current charge-discharge tests.Cost for fabricating LiFePO4  was also calculated.Synthesized cathode material LiFePO4 belonged to pure olivine-type phase with specific capacity of 160.1 mA·h/g and 145.3 mA·h/g at 0.2 C and 1 C，respectively，and the initial coulombic efficiency was 97.3%.Comparing with lithium chemicals as lithium resource，synthesizing LiFePO4  with lithium mineral as lithium resource might decrease cost for more than 12 000 Yuan/t.Meanwhile，circular economy was realized.

Key words: LiFePO4 , lithium mineral, fabricating cost, electrochemical performance