Preparation and Characterization of Porous Spherical LiFePO4/C by Spray Drying and Carbothermal Method
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2007年第S1期
论文作者：于锋 张敬杰
文章页码：853 - 855
摘 要：<正>The porous spherical LiFePO4/C powders were prepared by spray drying and carbothermal method （SDCTM）.Cheaper trivalent iron ion was used as the precursor.The pure olivine phase can be prepared with the spray drying and subsequent heat-treatment.The average particle size is around 10μm,and the value of porosity is 63.04%.The results indicate that the initial discharge capacity decreases with increasing charge/ discharge rate and reduces from 138.8 mAh·g-1 at C/20 rate to 98.3 mAh·g-1 at 2C rate,while the polarization between the charge and discharge plateaux is enlarged from 53 mv to 347 mv.However,the average discharge efficiency is up to 99.5% at 2C rate compared to 80.6% at C/20 rate from the second cycle.
于锋，张敬杰
摘 要：<正>The porous spherical LiFePO4/C powders were prepared by spray drying and carbothermal method （SDCTM）.Cheaper trivalent iron ion was used as the precursor.The pure olivine phase can be prepared with the spray drying and subsequent heat-treatment.The average particle size is around 10μm,and the value of porosity is 63.04%.The results indicate that the initial discharge capacity decreases with increasing charge/ discharge rate and reduces from 138.8 mAh·g-1 at C/20 rate to 98.3 mAh·g-1 at 2C rate,while the polarization between the charge and discharge plateaux is enlarged from 53 mv to 347 mv.However,the average discharge efficiency is up to 99.5% at 2C rate compared to 80.6% at C/20 rate from the second cycle.
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