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《Nonferrous Metals(Extractive Metallurgy)》 2019-11
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Study on Heat Treatment Process of Preparation of Lithium Iron Phosphate by Coprecipitation Method

WANG Hua-dan;CHEN Fu-jin;GONG Wei-hua;SU Yi;College of Chemical Engineering,Kunming University of Science and Technology;  
Lithium iron phosphate precursor was synthesized by coprecipitation method applying ferrous sulfate,phosphoric acid and lithium hydroxide as raw materials.High-rate lithium iron phosphate composite material(LiFePO_4/C)was obtained after calcination.Effects of temperature on morphology and electrochemical properties of precursor during calcination were studied.The results show that the output phase calcined at 750 ℃ is lithium iron phosphate with good spherical morphology and has the best electrochemical performance with conductivity of 5.10 S/m,tap density of 1.19 g/cm~3,and the first discharge specific capacity of 145.8 mAh/g at 0.1 Crate.Its internal resistance is 139.64Ω,cyclic voltampere curve is up and down in symmetrical with good cycle reversibility.
【Fund】: 国家自然科学基金资助项目(21666015)
【CateGory Index】: TM912;O614.111
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Chinese Journal Full-text Database 1 Hits
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Chinese Journal Full-text Database 1 Hits
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