以锂矿为锂源循环制备正极材料LiFePO4

Abstract

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

CLC Number:

TQ131.11

WANG Ping, WU Li-苹, WANG Zi-Cheng. Circulating preparation of cathode material LiFePO4 with lithium mineral as lithium resource[J]. INORGANICCHEMICALSINDUSTRY, 2014, 46(5): 48-.

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Inorganic Acid-Base-Salt Committee of CIESC

Circulating preparation of cathode material LiFePO4 with lithium mineral as lithium resource

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