Inorganic Chemicals Industry >
Study on the one-step hydrothermal synthesis of LiFePO4 and its properties
Received date: 2020-01-16
Online published: 2020-06-12
In order to optimize the one-step preparation technology of lithium iron phosphate (LiFePO4) by liquid phase me-thod,LiFePO4 cathode material was synthesized from ferrous sulfate,ammonium dihydrogen phosphate and lithium hydroxide by adding sodium dodecylbenzene sulfonate(SDBS) as surfactant.The effect of one-step hydrothermal synthesis technology on the composition,structure,morphology and particle size of LiFePO4 was studied.The material was characterized by ICP,XRD,SEM and particle size analyzer,and its electrochemical properties were tested.The results show that Li1.02Fe0.994PO4 with micron spherical particle morphology has been synthesized.The first charge-discharge specific capacities at 0.1C ratio are 162.0 mA·h/g and 159.9 mA·h/g,respectively.The Coulomb efficiency is 98.7% and the rate performance(in terms of 1C/0.1C holding rate) is 92.3%,and the holding rate of capacity was 96.4% at 0.1C ratio after 100 times cycle.It showed good electrochemical performance.
Key words: Lithium iron phosphate; Hydrothermal method; Properties
Ju Guo , Shuangzhu Jia . Study on the one-step hydrothermal synthesis of LiFePO4 and its properties[J]. Inorganic Chemicals Industry, 2020 , 52(6) : 36 -40 . DOI: 10.11962/1006-4990.2019-0426
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