Effect of Carbon Sources on Electrochemical Properties of LiFePO4/C Composite Cathode
Olivine-type LiFePO4/C composite cathode materials were synthesized by a solid-state reaction method in an inert atmosphere.Glycerin,glucose and citric acid were added as different conductive precursors before the formation of the crystalline phase.The effects of the carbon source on the properties of as-synthesized cathode materials were investigated.SEM and LSD measurement indicate that the particle size of the samples produced by glycerin and glucose distributed in a narrow way,while the particle of the sample produced by citric acid varied from submicron to several micron.The galvanostatically charge and discharge tests show that the material obtained by glucose gives a maximal specific discharge capacity of 142.5 mAh·g-1 in the first cycle.Further AC impedance measurements reveal the sample produced by glucose shows the lowest charge transfer resistance.
lithium ion battery cathode material lithium iron phosphate olivine type electrochemical property.
Ruan Yanli Wang Heng Cheng Bowen
School of Environment and Chemical Engineering,Tianjin Polytechnic University,Tianjin Municipal Key Laboratory of Fiber Modification & Functional Fiber,Tianjin,300160,China
国际会议
哈尔滨
英文
2181-2184
2010-07-24（万方平台首次上网日期，不代表论文的发表时间）