一氧化碳还原法制备磷酸铁锂—反应机理和动力学

CORC > 厦门大学 > 2008年第14卷

	一氧化碳还原法制备磷酸铁锂—反应机理和动力学; Synthesis of the LiFePO_4 by CO Reduction:Reaction Mechanism and Kinetics
	陈赟华 ; 杨勇 ; CHEN Yun-hua ; YANG Yong
刊名	http://electrochem.xmu.edu.cn/CN/abstract/abstract8580.shtml
	2008-11-28
关键词	磷酸铁锂一氧化碳还原高温原位XRD Li3Fe2(PO4)3 机理动力学 LiFePO4 CO reduction temperature-programmed X-ray diffraction Li3Fe2(PO4)3 mechanism kinetics
英文摘要	由CO还原FePO4和LiOH前驱体合成LiFePO4正极材料,应用XRD、SEM表征材料结构和形貌、充放电曲线测试电化学性能.结果表明,LiOH过量5%合成的LiFePO4样品颗粒度约200 nm,包覆碳后LiFePO4电极0.1C放电容量可达158 mAh/g.高温现场XRD对该合成反应作实时监控,借助时间分辨图谱分析,检测出Li3Fe2(PO4)3中间物.动力学研究表明成核与生长是该合成过程的速控步骤,反应活化能为89.44 kJ/mol.; LiFePO4 cathode material was synthesized by CO reducing FePO4 and LiOH precursors.The structure,morphology and electrochemical performances of such LiFePO4 material were characterized by XRD,SEM and charge-discharge tests.It was shown that the particle size of the LiFePO4 synthesized with 5% excess of LiOH in the precursor was about 200 nm.By carbon coating,the LiFePO4 electrode was able to deliver a reversible capacity of 158 mAh·g-1 at 0.1C discharge rate.Temperature-programmed X-ray diffraction was employed to monitor the reaction during the formation of LiFePO4,and Li3Fe2(PO4)3 was found to be an intermediate by analyzing the time-resolved XRD patterns.Kinetic study indicates that nucleation and their growth is the rate-determining step in the process of the reaction and the activation energy of this reaction was 89.44 kJ/mol.; 作者联系地址：厦门大学固体表面物理化学国家重点实验室,化学化工学院化学系;; Author's Address: State Key Lab for Physical Chemistry of Solid Surfaces and Department of Chemistry,College of Chemistry and Chemical Engineering,Xiamen University,Xiamen 361005,Fujian,China
语种	中文
出版者	厦门大学《电化学》编辑部
内容类型	期刊论文
源URL	[http://dspace.xmu.edu.cn/handle/2288/58130]
专题	2008年第14卷
推荐引用方式 GB/T 7714	陈赟华,杨勇,CHEN Yun-hua,等. 一氧化碳还原法制备磷酸铁锂—反应机理和动力学, Synthesis of the LiFePO_4 by CO Reduction:Reaction Mechanism and Kinetics[J]. http://electrochem.xmu.edu.cn/CN/abstract/abstract8580.shtml,2008.
APA	陈赟华,杨勇,CHEN Yun-hua,&YANG Yong.(2008).一氧化碳还原法制备磷酸铁锂—反应机理和动力学.http://electrochem.xmu.edu.cn/CN/abstract/abstract8580.shtml.
MLA	陈赟华,et al."一氧化碳还原法制备磷酸铁锂—反应机理和动力学".http://electrochem.xmu.edu.cn/CN/abstract/abstract8580.shtml (2008).